Hypothesis: There is a synchrony between the time the bus passes over the hill, the time the cat is positioned on the bench and the time I talk to the cat.
An experiment will be established to prove or deny this hypothesis. This experiment will try to answer if there is a synchrony between the bus, the cat and me.
First, I will write down the time I usually leave the house for the bus stop and then I will look for a schedule of the buses in my city, to evaluate the times when each one passes above the hill to which I refer.
It is necessary that I clock the time spent between my home and the bus stop to which I am going, so that I can relate to the bus schedule.
I must also install a camera system at the bus stop to observe the times the cat arrives at that location.
Every day, for a month, I will write down the time I left home, the time I arrived at the bus stop, the time the cat arrived at the bus stop and the time the bus passed. At the end of this period, I will do average calculations to find out how many times our schedules have been synchronized. Through these data I will conclude whether the hypothesis is false or true.
Active transport makes it possible for cells to:______.
a. transport out secretory products and waste material against concentration gradients.
b. take up nutrients from the environment against concentrations gradients.
c. maintain nonequilibrium intracellular concentrations of ions such as Na , K , Ca2 , and H .
d. establish an electrical potential across the membrane.
e. All of the above are correct.
Answer:
e. All of the above are correct.
Explanation:
Active transport is a type of transport in living systems in which molecules/ions/substances are moved or transported against their concentration gradient i.e. from a region where the substance is LOW to a region which it is HIGH, across a membrane. Since molecules are transported across a memembrane against their concentration gradient, an energy input in form of ATP is needed to do so.
Active transport is used in living systems to transport out secretory products and waste material against concentration gradients, take up nutrients from the environment against concentrations gradients etc. Since ions are substance moved by active transport from a low region to high region, there is an imbalance in the intracellular concentration of ions, such as Na, K etc.
Since there is no equilibrium in the concentration of ions on opposite sides of the membrane, an electric potential is formed across the membrane i.e. one part of the membrane will be more positively charged than the other.
A population of 100 butterflies living on an acre of land loses three-quarters of its members when a sudden freeze in the spring occurs just after they emerge as caterpillars. This population has undergone a reduction in population size due to
Answer:
The correct answer is - a density independent factor.
Explanation:
Any external cause or change that leads to the change in the size of a population regardless of the density of the particular population known as a density independent factor in ecology.
Density independent factors are the factors that are not affected by the size of the population size of the species such as weather, climate and natural disasters.
Thus, the correct answer is - a density independent factor.
Question 4 of 18
These box plots show the prices for two different brands of shoes.
65 70 75 80 85
Brand A
HTH
20
65
80 85
95
Brand B
TH
TT
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Price ($)
Which statement is the most appropriate comparison of the spreads?
Answer:
Brand B
Explanation:
brand B is correct
Please help! will give brainlist!
Answer:
mark me i will send you the essay
The paranasal sinuses are lined with a membrane that creates mucus during allergies or the common cold. Presence of mucus and swelling of the membranes can cause a "sinus headache." If Regina has a cold and she feels the pain of a sinus headache inferior to her eyes, which bone is housing the affected paranasal sinus?
Answer:
The maxillary sinus, that is, the sinus located in the upper jaw, would be affected.
Explanation:
Sinusitis is a very traditional disease that is associated with headache, discomfort, and increased mucus making.
The causes can be viral or bacterial or even by some inhaled noxa, sinusitis of this type is bilateral, different from sinusitis of dental cause that are usually unilateral.
The paranasal sinuses are the sinuses that pneumatize the head, that is, they generate an internal air current in the bones to be able to heat and disinfect them from those noxas that are inhaled (that is why they are covered by a ciliated mucosa that drags the noxa to the outside and also its structure is pseostratified with mucous cells that secrete mucus enveloping the noxa).
Another function of the paranasal sinuses is to be able to alleviate the weight of the head, since the shell and the bones that remain in the head formation are very heavy, thus generating these cavities filled with air to alleviate the feeling of "heavy head" "When they become inflamed and filled with mucus, they are obliterated or with a reduced space, so the head feels heavier for some people.
The paranasal sinuses are the maxillary sinuses that are in the upper jaw, the sphenoid sinuses that are in the sphenoid, the ethmoid sinuses that are in the ethmoid and the frontal ones that are in the frontal bone that is vulgarly called as the forehead.
If fossil species A is consistently recovered from geological deposits beneath layers containing fossil species B, then A is considered to be older than B. This relative dating technique is based on the principle of Group of answer choices fluorine analysis. paleomagnetism. geolayering. superposition.
Answer:
superposition
Explanation:
Dating consists of ordering geological events according to the time they occurred, which ones occurred first, and which ones occurred latterly. This dating can be done by using the superposition geological principle.
Sediments can be incrusted in horizontal layers in the ground, called stratum. Different stratum can give us information about the environment in the past. They keep information about the age and the conditions under which the sediments got deposited.
Some geological principles allow us to date, relatively, the age of different geological events in the past.
Sediment layers place in a temporal sequence, let us know that the older layers are located in an inferior position concerning the newer layers. Hence, fossil species placed in more inferior layers are supposed to be older than fossil species found in more superficial layers.
What happens when carbon dioxide is passed over lime water? What happens when excess carbon dioxide is passed over lime water? Explain in 2-3 statements and write two balanced chemical equations.
Answer:
in 1 it forms insoluble CaCo3 which is white in excess it forms soluble calcium hydrogen carbonate which is colourless
1:Ca(OH)2{aq}+CO2{g} - CaCO3{s}+H2O{l}
2:CaCO3{s}+H2O{l}+CO2{g} - Ca(HCO3)2{aq}
answer the questions.
Answer: 1. How can a healthy lifestyle lead to a healthy heart.
The heart is one of the vital if not the most vital organ of the human body,this is because it is the heart that pumps blood into systemic circulation so that the other body organs,tissues and cells can function adequately.
Any disease or injury to the heart virtually affects all other parts of the body. Therefore a healthy and proper functioning heart is important and this can only be achieved through a healthy lifestyle.
Lifestyles such as;
- Regular exercise/physical activity which will help one to loose excess weight and maintain physical fitness because when one is overweight,fat deposits on the wall of the artery narrowing the lumen/wall, this in-turn causes blood to exert more pressure as it moves through the artery and in-turn lead to hypertension and other heart conditions.
- Stop or limit the intake of alcohol because it increases your chances of getting stroke,heart attack and hypertension through the damage of heart muscles.
- Drinking enough water; this helps the kidney to filter away waste from the body preventing the waste from building up/accumulating in the body especially the heart and as such causing heart problems.
Managing of stress very well to prevent a higher risk of heart disease.
-Eat a healthy diet and manage your blood cholesterol level to prevent damage to heart muscles and blood vessels which will in-turn lead to cardiovascular disease.(High density cholesterol HDL is the good type of cholesterol and low density cholesterol (LDC) is bad for the body.
- Regular visit to a cardiologist when one has a family history of hypertension or any other heart disease.
2. HOW IS HYPERTENSION A BLOOD RELATED DISEASE?
Hypertension is a blood related disease because hypertension is caused when the force of blood along the lumen of artery (artery wall) is higher than normal. This exerted pressure by the blood gets too intense enough to cause a heart problem or a hear disease.
When the pressure gets too intense enough to rupture the artery wall,the individual comes with a heart condition known as stroke.
Technology can have good and bad effects. What is a bad effect of spraying
pesticides on crops?
Answer:don’t put pesticides that will harm humans on your crops.
Explanation: many pesticides in today’s world will get people sick and cause disease.
Which of the following statements is false? Unselected We clear and swallow over 2 million alveolar macrophages per hour. Unselected Alveolar surfaces are usually sterile. Unselected Remarkably efficient alveolar macrophages crawl freely along the internal and external alveolar surfaces. Unselected Huge numbers of infectious microorganisms are continuously carried into the alveoli.
Answer:
Remarkably efficient alveolar macrophages crawl freely along the internal and external alveolar surfaces
Explanation:
The alveolar macrophages are present on the internal lumenal surfaces of the alveolar ducts, the alveoli, and the bronchioles.
Alveolar macrophages are phagocytes that uses several surface receptors to release many secretions, to interact with other cells and molecules.
But the alveolar macrophages are intact to the inner surface only and do not crawl freely along the internal and external alveolar surfaces.
Hence, the correct option is " C".
Mutations in a gene occur at a rate of one nucleotide every 10 million years. The gene sequence differs by 6 nucleotides between two related organisms. How long ago did these organisms split from a common ancestor
Answer:
Total time split from a common ancestor = 30 million
Explanation:
Given:
Number of nucleotide = 6
Number of organism = 2
Rate one nucleotide = 10 million year
Computation:
Total time split from a common ancestor = [Rate one nucleotide / Number of organism]Number of nucleotide
Total time split from a common ancestor = [10 million / 2] 6
Total time split from a common ancestor = [5 million] 6
Total time split from a common ancestor = 30 million
Chemicals used in chemotherapy treatments to fight cancer can also harm cells in hair follicles and bone marrow. What characteristic do these cells most likely share with cancerous cells?
Answer:b
Explanation:
A storm brings two formerly separated populations of beetles together. They look very similar. Under the biological species concept, which of the following would show that the two populations are different species?
A. One population breeds in spring, the other in fall.
B. Males of the two populations have different flight patterns in courtship.
C. When individuals from the two populations mate with each other in the laboratory, the eggs fail to hatch.
D. All of the above is correct.
E. None of the above is correct.
Answer:
The correct option is D: All of the above is correct.
Explanation:
The biological species concept says that species are population groups that, in a real or potential way, can reproduce among each other and that are reproductively isolated from other groups.
Individuals belonging to a species cannot mate with members of other species, and if they do there is not any reproductive success.
The mechanisms of reproductive isolation might be divided in prezygotic and postzygotic.
Prezygotic or Premating mechanisms:
Ecological or due to habitat isolationSeasonal or temporal. This is the case described in option A "One population breeds in spring, the other in fall". These species are reproductively isolated because they differ in their breeding season.Sexual or ethological. This is the case described in option B "Males of the two populations have different flight patterns in courtship". Males belonging to each species behave differently during courtship. MechanicalGametes incompatibilityZygotic or Postmating Mechanisms:
Hybrid inviability. This is the case described in option C which states that "When individuals from the two populations mate with each other in the laboratory, the eggs fail to hatch". Eggs fail to hatch because the zygote is inviable. Hybrid sterilityHybrid decreased fertilityThe graph shows the frequency of two alleles for a genetic trait in a population. A graph entitled Frequency of 2 Alleles in a Population has generation number on the horizontal axis, and frequency on the vertical axis, from 0 to 1. Allele Upper A has a 0.5 frequency at generations 1, 2, 3 and 4. It has a 0.45 frequency at generation 5. Allele a has a 0.5 frequency from Generations 1 through 4 and then has a frequency of 0.55 at generation 5. Which question is a biologist most likely to ask after seeing this graph? Did the observer make the wrong observations in generation 5? How many individuals were observed in each generation? Is there a theory that explains the results in the graph? Will the frequency of the alleles in this population change again?
Answer:
C. Is there a theory that explains the results in the graph?Explanation:
i tack test
Next make at least four genetic matches of offspring by moving the chromosomes from a sperm and egg cells together to form a diploid offspring. in the table record The genotype and phenotype of each offspring as shown in the example.
Explanation:
A- represents gene for normal skin
a- represents a gene for albinism
Genotype Aa × As
Gametes A a A a
Gamete A a
A. AA Aa
a. Aa. aa
You are relaxing, having a snack and watching TV, when suddenly the entire house begins to shake violently. The activity of your ________ quickly decreases, while that of your ________ increases. autonomic nervous system; somatic nervous system parasympathetic division; sympathetic division sympathetic division; somatic nervous system sympathetic division; parasympathetic division somatic nervous system; autonomic nervous system
Answer:
parasympathetic division; sympathetic division
Question
Q2. A student places peaches into a pure water solution
Give two differences you would expect to find in the water
after ino hours.
Answer:
The correct answer - peaches will swell.
Explanation:
In the hypotonic solution, solution has a higher water potential than that of the cell of peach, so water will move from a region of higher water potential to a lower water potential across via osmosis.
Peaches have more solutes than pure water as it has higher sugar content than pure water. Hence, endosmosis will take place which means the water molecules will move from outside to inside of the peaches through wall of peaches takes place. Due to this, peaches will swell eventually.
Thus, the correct answer - peaches will swell.
The list below represents some dominant and recessive traits observed in pea plants.
Dominant
Recessive
Green pods (G) Yellow pods (g)
Smooth seeds (S) Wrinkled seeds (s)
To produce 100% offspring with yellow pods and wrinkled seeds, what parental genotypes must a researcher use?
O GGSS X Ggss
ggSS X GgSS
O GGss X SSGG
ggss X ggss
Answer:
ggss x ggss
Explanation:
To produce 100% offspring having yellow pods (g) and wrinkled seed (s), we need to cross two organisms having yellow pods and wrinkled seeds.
You'll understand more by the Punnett square in the attached file.
A lichen is an organism that structurally appears to be a single organism. But a lichen is actually two different organisms—a fungus and green algae—living together as one organism. The fungal partner derives its nutrition from the photosynthesizing algae. How does a lichen differ in its photosynthetic activity from Elysia chlorotica, the sea slug that’s considered to be a photosynthesizing animal? A. In lichens, the fungi photosynthesize on their own, while Elysia chlorotica forms a relationship with a photosynthesizing plant. B. In lichens, the relationship with the algae lasts throughout the life cycle, but in Elysia chlorotica, the relationship occurs only during the immature juvenile stage of the slug’s life cycle. C. Lichens can photosynthesize only because of the living algal partner, while Elysia chlorotica incorporates chloroplasts from algae into its cells. D. In lichens, the association between the fungi and algae is permanent, while Elysia chlorotica associates with a photosynthesizing organism only when it requires food.
Answer:
Option C
Explanation:
Lichens can photosynthesize only because of the living algal partner, while Elysia chlorotica incorporates chloroplasts from algae into its cells.
Elysia chlorotica which is a form of sea slug feeds on a specie of the genus Vaucheria (an algae) and then retains only the chroloplasts of these algae which it uses for its own supply of energy.
The algal partner in lichens is the photosynthesizing partner. It produces food and this is its role in the relationship. The fungi are heterotrophs and cannot photosynthesize food. The fungi contribute to the relationship my absorbing mineral and water and presents it to the algae.
Answer:
Lichens can photosynthesize only because of the living algal partner, while Elysia chlorotica incorporates chloroplasts from algae into its cells.
Explanation:
What is most likely to happen to a population of mice that becomes isolated on an island?
Many different species will form as they evolve and fill different niches on the island.
The population of mice will adapt to life on the island but will still be able to breed with the mainland population.
Many different species that are capable of breeding with each other will form.
The population of mice will evolve into a new species of mouse that is adapted to all the different niches that are found on the island.
The most likely thing that will happen to a population of mice that becomes isolated on an island is Many different species will form as they evolve and fill different niches on the island.
What is population?Population refers to group of organisms occupying a specific geographical lol cation and interacting with their environment at a particular time.
Therefore, The most likely thing that will happen to a population of mice that becomes isolated on an island is Many different species will form as they evolve and fill different niches on the island.
Learn more about population below.
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Answer: D.) The most likely thing that will happen to a population of mice that becomes isolated on an island is Many different species will form as they evolve and fill different niches on the island.
Explanation: got 100 on the test
Not all of the members of everyday categories have the same. Most fish have gills, fins, and scales. Sharks lack the feature of scales, yet they are still categorized as fish. This is most problematic for the __________ approach to categorization.
Answer:
species to
Explanation:
In the F2 generation of Mendel’s crosses
In the f2 generation of mendel's crosses, all plants had the dominant trait,all plants had both the dominant and recessive alleles. one in four plants had two alleles for the recessive trait.
Answer:
one in four plants had two alleles for the recessive trait.
Explanation:
Which is the BEST example of technological design? a. Researching a new AIDS treatment medication. b. Researching the origin of the cosmos. c. Researching North American swallow migration patterns. d. Researching oceanic current cycles.
Answer:
it can be any if u give an explanation to support it
Explanation:
but i would say A as it requires lots of advanced medical technology designs to come that far as it can be quite expensive
hope this helps
i would appreciate it if u can heart and like my answer and maybe even give it 5 stars or brainliest pls i beg u thx !!! : )
Answer:
The answer is A i just tried it
Explanation:
what's the difference between infectious diseases and non-infectious diseases?
Answer:
[tex]\boxed{\sf {view \: explanation}}[/tex]
Explanation:
Infectious diseases are contagious and can be spread from one person to another. Non-infectious diseases are not contagious and cannot be spread from one person to another.
Few examples of infectious diseases include influenza, SARS, and common cold.
Few examples of non-infectious diseases include cancer, diabetes, and many heart diseases.
enlist the sources of nitrogen fertilizer
Answer: hope this helps....
Explanation: organic sources of nitrogen include alfalfa meal, which supplies 2 percent to 3 percent nitrogen and lasts approximately one-third of the year. Dairy and poultry manure also can release suitable amounts of nitrogen fresh or composted manure can also be from an acceptable organic source such as small independent farms.
Answer:
nitrogen is the main source of fertilization to plants
Explanation:
the main and big source of nitrogen fertilizers are atmospheric nitrogen which has to be converted into nitrates because plants cannot pick up the atmospheric nitrogen directly but now genetic engineering has produced plants that can fix nitrogen directly from environment its main source is nitrogen cycle
Which is least likely to be impacted by runoff from a factory? A) river B) groundwater C) lake D) ocean
Answer:
Groundwater
Explanation:
The factories mostly need large quantities of water to carry out their production precesses, however, as well as they need natural recources for their operation, they also dispose of them and a large part of the environmental contamination is due to the release of substances emitted by these. It´s very easy for toxic waste to contaminate rivers, lakes and aceans. Groundwater on the other hand is more complicated to contaminate because it´s found in aquifers below the surface of the arth, making by these factories to reach these places; althouh not impossible.
In pea plants there is a dominant allele (A) for green pods and a recessive allele (a) for yellow pods. Suppose a heterozygous plant is crossed with a plant that has yellow pods. Complete the sentences about this monohybrid cross with the correct terms.
The phenotype of the heterozygous plant is
The genotype of the heterozygous plant is
The genotype of the plant with yellow pods is
The genotype of the gametes produced by the heterozygous plant is
The genotype of the gametes produced by the plant with yellow pods is
The expected frequency of F_1 plants with yellow pods is
The expected frequency of F_1 plants with the genotype AA is
Aa
75% A and 25% a
25%
50% A 50% a
0%
green pods
75% AA and 25% Aa
AA
yellow pods
75%
aa
50%
100% A
100% a
Answer and Explanation:
The phenotype of the heterozygous plant is green podsThe genotype of the heterozygous plant is AaThe genotype of the plant with yellow pods is aaThe genotype of the gametes produced by the heterozygous plant is 50% A 50% aThe genotype of the gametes produced by the plant with yellow pods is 100% a The expected frequency of F_1 plants with yellow pods is 50%The expected frequency of F_1 plants with the genotype AA is 0%Cross) a heterozygous plant is crossed with a plant that has yellow pods
Parental) Aa x aa
Phenotype) Green pods Yellow pods
Gametes) A a a a
50% 50% 100%
Punnet Square) A a
a Aa aa
a Aa aa
F1) 2/4 = 1/2 = 50% Aa, Plant with Green pods
2/4 = 1/2 = 50% aa, Plant with Yellow pods
In the given case, the correct terms are:
The phenotype of the heterozygous plant is green pods The genotype of the heterozygous plant is Aa The genotype of the plant with yellow pods is aa The genotype of the gametes produced by the heterozygous plant is 50% A 50% a The genotype of the gametes produced by the plant with yellow pods is 100% a The expected frequency of F_1 plants with yellow pods is 50% The expected frequency of F_1 plants with the genotype AA is 0%It is given that A gives green color which is dominant and a gives yellow pods which is a recessive trait. So in heterozygous conditions, only the dominant character will express itself therefore green color pods
The phenotype of heterozygous plants is Green podsIn heterozygous conditions, the alleles of a genotype are different. Therefore one allele is A and the other is a
The genotype of the heterozygous plant is AaThe yellow color of pods is a recessive trait and recessive trait if expressed only in the same alleles conditions that mean it is given by allele a. Therefore, the genotype of yellow pods is aa
The genotype of the plants with yellow pods is aaThe alleles in the heterozygous conditions are A and a so half of the gametes will have A and the other half have a
The genotype of gamete produced by heterozygous plants are 50% A and 50% aThe yellow pods are obtained by genotype aa. All the gametes are a
The genotype of gametes produced by the plants with yellow pods is 100% aCross:
A a
a Aa aa
a Aa aa
In the cross, there are 2 genotypes produced as aa out of four. So 2/4 × 100 will give 50%
The expected frequency of F1 plants with yellow pods is 50%There are no genotypes obtained as AA in the cross. Therefore, 0 out of 4 offspring will give 0%
The expected frequency of F1 plants with genotype AA is 0%Learn more:
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What is the relation between Genes and DNA?
Answer:Gene and DNA are the two genetic terminologies mainly used to determine the characteristics of a living thing. In general, a gene is a short section of DNA and DNA- Deoxyribonucleic acid is a molecule which carries the genetic instructions or the hereditary materials
Explanation:The difference between DNA and gene are summarized below
Difference between Gene and DNA
Gene DNA- Deoxyribonucleic acid
Genes are the DNA stretches which encode for specific proteins. DNA is a biomolecule, which contains genetic information
Regulates the traits of an organism. Regulates gene regulation.
Gene is a specific sequence present on a short stretch of DNA. DNA made up of two long chains of polynucleotides wound together
Genes are made up of either DNA or RNA. DNA is a polymer of nucleotides
A gene is located on a chromosome. DNA is located within the nucleus of the cell.
Are coded with heredity information. Encodes the genetic instructions.
Feedback inhibition prevents cells from:____________.
a. the harmful effects of enzyme activation by covalent modification of unneeded enzymes.
b. making products that are not needed by inhibiting the activity of enzymes in biosynthetic pathways allosterically.
c. irreversibly inhibiting critical enzymes.
d. destroying enzymes by proteolytic cleavage when they are needed in biosynthetic pathways.
e. accumulating unnecessary proteins.
Answer:
b. making products that are not needed by inhibiting the activity of enzymes in biosynthetic pathways allosterically.
Explanation:
The feedback inhibition is a method of cellular control were the active cellular enzymes is inhabited and it allows the cells to regulate how enzymes are needed to produce at the end. This feedback acts as a first enzyme amino acid production and is usually complete through the allosteric site. It changes the shapes and behavior of the active cell.answer asapppp
Prokaryotes, like most living organisms, need movement to locate food and to survive. If a prokaryote needed to move to a new food source.
which structure would it use for locomotion?
pilli
2
capsule
-flagellum
so
chromosome
Answer: The answer is flagellum
Explanation: Prokaryotes are single-celled organisms belonging to the domains Bacteria and Archaea, and flagellum is a whip-like structure that allows a cell to move. They are found in all three domains of the living world: bacteria, archaea, and eukaryota, also known as protists, plants, animals, and fungi. Also The primary role of the flagellum is locomotion, but it also often has function as a sensory organelle, being sensitive to chemicals and temperatures outside the cell. Flagella are organelles defined by function rather than structure. Flagella vary greatly.
( hope this helped )
Answer:
Flagellum
Hope this helps!
Explanation: