Answer:
14. Which of the following is an independent variable in the investigation? (A) Year in which the sample was collected
15. To evaluate the reliability of the results, it would be best to know which of the following? (B) The number of males in each sample
Explanation:
Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter. In the exposed example, the Year in which the sample was collected is an independent variable.Probably the year in which the sample was collected is not the cause of phenotypes differentiation between males, but it is a variable that reflects the change of armor-plate through the years. With this information, scientists can make assumptions and reach a conclusion about the phenotypic variation of the trait in sweet water through the years.
The sample size is very important during a scientific investigation. The correct sample size depends on the investigation project. We need to study a correct amount of individuals to obtain conclusive and reproducible results or, on the contrary, the results will not be informative or robust at all. When sampling wild animals, many times it is difficult to obtain the ideal number of individuals, especially in aquatic animals that are hard to reach, so we have to manage with the amount that we are able to get. However, if we are working with a few individuals, or the samples are not comparable in size with each other, it is very important to consider this in the discussion and conclusions of your work. The risk with small-sized samples is that we might be studying individuals with extreme phenotypes that are not representative of the whole population. This is why it is important to get a certain number of animals, to analyze those that are most representative, and eliminate the outliers.In the exposed example, per sample, we need to get approximately the same amount of male fishes to perform a reliable comparison between years and the phenotypic changes in time.
Answer:
14. A
15. B
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The Fitness of Water. For each of these statements about water, decide whether the statement is true and describes a property that makes water a desirable component of cells (T); is true but describes a property that has no bearing on water as a cellular constituent (X); or is false (F). For each true statement, indicate a possible benefit to living organisms.
a. Water is a polar molecule and hence an excellent solvent for polar compounds.
b. Water can be formed by the reduction of molecular oxygen O2.
c. The density of water is less thaan the density of ice.
d. The molecules of liquid water are extensively hydrogen-bonded to one another.
e. Water is odorless and tasteless.
f. Water has a high specific heat.
g. Water has a high heat of vaporization.
Answer:
A) True
The polarity of water is what makes it an ideal transport vehicle for nutrients and micronutrients that are water-soluble. Within organisms, water can be used to transport nutrients and even waste from one part of the body to the other. In the case of humans, urine is used to get rid of soluble waste from within the body.
B) True
During the process of photosynthesis, carbon dioxide (CO2) and water (H2O) are taken from the air and soil respectively. Oxygen is able to produce water when it is reduced. Hydrogen during this process is oxidized.
C) False
Ice floats on water. Hence it cannot be denser than water. Rather, water is denser than Ice. Because of the structure of hydrogen bonds, when they are iced, the bonds tend to pull apart, thus making ice expand somewhat. This expansion creates microscopic pockets of air in the molecules thus given them buoyancy.
D) True (X)
E) True (X)
F) True
Heat Capacity refers to the amount of heat a substance like water can absorb before it's temperature rises by 1 degree. This property is important, because, were it not for the high specific heat capacity of water, many people and plants would have boiled over.
G True (X)
Heat of vaporization is the kind and amount of energy required to alter one gram of liquid into a gas at boiling point
Cheers
which statement describes two organ systems working together to deliver nutrients to cells?
A. The excretory system removes excess nutrients from blood as it
makes urine.
B. The blood absorbs the nutrients that the digestive system obtains
from food.
C. The respiratory system transfers oxygen removed from nutrients
to the blood.
D. The molecules of important nutrients are made from food in the digestive system
Answer:
option B is the correct answer
Explanation:
the circulatory system and digestive system both are working to deliver food to each and every cell.
plz mark my answer as brainlist plzzzz.hope this will be helpful to you and plzzz.
B) The blood absorbs the nutrients that the digestive system obtains from food the two organ systems work together to deliver nutrients to cells.
The circulatory system and digestive system both are working to deliver food to each and every cell.
How do organ structures get meals to the cells?The digestive system converts the ingredients we consume into their simplest bureaucracy, like glucose (sugars), amino acids (that make up protein), or fatty acids (that makeup fat). The damaged-down meals are then absorbed into the bloodstream from the small intestine and the nutrients are carried to every mobile in the body.
These frame structures are all characteristic to maintain the cells in your frame: the circulatory, respiration, and digestive structures provide the nutrients and electricity your cells need to stay. The immune gadget protects these cells from pathogens.Your circulatory gadget, which consists of your coronary heart, blood, and blood vessels, is liable for transporting vitamins to the cells of your body. Particularly, nutrients are transported at some stage in your frame thru your blood thru capillaries, tiny blood vessels that join arteries to veins.
The cell consists of three components: the cell membrane, the nucleus, and, between the 2, the cytoplasm. In the cytoplasm lie complicated arrangements of first-class fibers and loads or maybe hundreds of minuscule but awesome structures known as organelles.
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Which of the following is a terrestrial planet?
A. Earth
B. Jupiter
C. Saturn
Answer:
A
Explanation:
Answer:
a
Explanation:
During photosynthesis, plants use carbon dioxide and water to make sugars and oxygen. Is this a chemical change? Why or why not?
In the morning, Jorge watched a cartoon about a sarcastic rabbit. Later, in his psychology class, he viewed
the image above and readily identified it as a rabbit instead of a duck. Which of the following best explains
this phenomenon?
Answer:
The correct answer is - priming.
Explanation:
Priming is a phenomenon that explains the behavior of an individual when an individual experiences a certain stimulus that influences response to a subsequent stimulus, unknowingly of the connection. This effect is known as the priming effect.
In this case, watching a cartoon of a rabbit acts as the stimulus that influences the response of identifying the image of duck as a rabbit. He is experienced priming effect.
In a cross of purple flowered heterozygous plants (Pp), the letter P represents the allele for purple flowers and the letter p represents the allele for white flowers.
What is the probability that an offspring of this cross expresses plants with purple flower phenotypes?
A. 0
B. 1/4
C. 1/2
D. 3/4
Answer:
D. 3/4
Explanation:
I took the test and got it right.
Graphite and diamond are polymorphs of carbon
True or false
Answer:
they are polymorphs
Explanation:
just trust me
Answer:
Graphite and diamond are considered to be polymorphs. The answer is True I am pretty sure. They are made of sheets of carbon I am pretty sure.
What are the answers too those
Answer:
a, d, b, c, a, c, d, b, a, d,
Explanation:
A cross between a plant with red flowers (R = dominant) and a plant with white flowers (r = recessive) yielded 47 plants with red flowers and 51 plants with white flowers. What are the genotypes of the parent plants? Explain.
A. The results are close to a 1:1 ratio of plants with red flowers to plants with white flowers. Therefore, the genotypes of the parents are Rr and rr.
B. The results should yield plants with red flowers and plants with white flowers in a 3:1 ratio due, so the geneotype of each parent is Rr. The number of offspring was not large enough to produce the expected results.
C. The results differ from the predicted values. Therefore, the genotypes of the parents cannot be determined.
D. The results should show a ratio of 3 plants with white flowers to 1 plant with red flowers, so the genotypes of the parent plants are RR and rr.
Answer:
A. The results are close to a 1:1 ratio of plants with red flowers to plants with white flowers. Therefore, the genotypes of the parents are Rr and rr.
Explanation:
I took the test and got it right.
what is inactive when sleeping
Answer:
parts of your brain including the precuneus, basal forebrain, and basal ganglia are deactivated during sleep.
Explanation:
How have human populations used surface currents over time?
Answer:
Changes in land use through time with extrapolations
Explanation:
Population data and projections are from UNDP
All three types of worms that undergo asexual reproduction use which process?
binary fission
O budding
fragmentation
O spore formation
Answer:
Budding is the answer to this.
Answer:
budding
Explanation:
Which of the following is NOT involved in photosynthesis or cellular respiration?
a
cytokinins
b
chlorophyll
c
carbon dioxide
d
water
Answer:
a
Explanation:
Cytokinins are not involved in photosynthesis or cellular respiration. They are plant hormones that help regulate cell division and growth. On the other hand, chlorophyll, carbon dioxide, and water are all involved in photosynthesis and/or cellular respiration. The correct option is A.
What are Cytokinins?Cytokinins are plant growth hormones that stimulate cell division and delay senescence. They play a role in plant growth and development, but they are not involved in photosynthesis or cellular respiration. On the other hand, chlorophyll, carbon dioxide, and water are all involved in photosynthesis.
Chlorophyll is a pigment that absorbs light energy and converts it into chemical energy, while carbon dioxide and water are used to make glucose and oxygen through the process of photosynthesis.
Cellular respiration is the process by which cells convert glucose and oxygen into energy. Both carbon dioxide and water are produced as byproducts of cellular respiration. Therefore, all the options except cytokinins are involved in either photosynthesis or cellular respiration.
Therefore, the correct option is A.
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describe how a supernova and neutron star are related?
Answer:
Neutron stars are one of the possible ends for a star. They result from massive stars which have mass greater than 4 to 8 times that of our Sun. After these stars have finished burning their nuclear fuel, they undergo a supernova explosion. ... It collapses so much that protons and electrons combine to form neutrons.
Suppose you are a research assistant in a lab studying DNADNA-binding proteins. You have been given the amino acid sequences of all the proteins encoded by the genome of a certain species and have been asked to find candidate proteins that could bind DNADNA. What type of amino acids would you expect to see in the DNADNA-binding regions of such proteins
Answer:
The correct answer would be - Positively charged amino acid at pH 7 such as lysine, arginine, and histidine.
Explanation:
We know that DNA is a negatively charged molecule and proteins bind with them. This binding takes place between negative DNA molecules and positively charged amino acids of DNA binding protein.
Amino acids form hydrogen bonds with the nitrogen bases or phosphate groups of the DNA. Therefore, the DNA binding amino acid sequence should be of positively charged amino acids like lysine, arginine, and histidine at pH 7.
Explain the benefits for the administration of an isotonic solution?
why gasoline is it important for the environment
Answer:
As the cleanest-burning fossil fuel, natural gas plays an important role in improving the environment by reducing air pollution and greenhouse gas emissions across the U.S. Natural gas produces half as much carbon dioxide and an even smaller fraction of other air emission generated by coal.
Explanation:
What is one reason why rock layers are not horizontal?
They were formed at an angle.
They were formed veritcally.
The area was once covered by water.
A force pushed the rock layers after they were formed.
Answer:
the last one, as they would be pushed together either going up or down when tectonic plates shift.
Explanation:
Answer: A force pushed the rock layers after they were formed.
Explanation:
Question 4
What structure is the brain's "thermostat?"
7. a) How does a vaccine relate to the virus that it protects against? (1 point)
Will be marking brainliest!
Answer:
A vaccine usually is the virus in an altered way, like, most vaccines like the flu shot is a dead flu virus, so by injecting a dead flu virus in your body you learn how to protect yourself from it.
Explanation:
Which graph should be used to represent the
percent composition of the human body?
bar graph
line graph
pie graph
Answer:
I think its pie graph cause the other ones don't sound good...
Explanation:
i don't know I'm just here for the points... so yeah there u go I think this is the answer. so pie graph is the answer.
Define Global Warming
Answer:
a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.
Answer:
a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.
Explanation:
What are these please
The increased subsidence of southern Louisiana, from 3 ft to 12 ft every 100 years, contributed to the effects of Hurricane Katrina.
Which of the following is not a cause of this subsidence?
A)
the extraction of groundwater
B)
the extraction of oil and gas
C)
the loss of freshwater wetlands
D)
the lack of tall trees such as cypress
E)
the practice of building on hilly areas
Answer:
Types of Wetlands
tupelo gum trees
Tupelo Gum Pond, Source: Missouri Dept of Conservation
Answer: E.) the practice of building on hilly areas
Explanation: got it right on edge 2021! :)
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Answer:
Number 1
Explanation:
Through the process of transformation, bacteria cells can take up plasmids that contain recombinant DNA
TRUE or FALSE
Answer:
true
Explanation:
What causes currents to move around in circular patterns
Answer: Coriolis effect
Explanation:
Hope this help to your question.
Answer:
Coriolis effects causes wind currents to move in circular patterns.
Explanation:
What is the next stage after the body plan is established?
Answer:
Origin. 20 out of the 36 body plans originated in the Cambrian period, in the "Cambrian explosion", However, complete body plans of many phyla emerged much later, in the Palaeozoic or beyond.
Where in the world is the highest temperature, relative to precipitation?
Geology- approximately how much more energy is released in a 7.5 richter magnitudue earthquake than a 5.5?
Answer:
About 2000 thousand times more
Explanation:
The amount of energy released in a 7.5 richter magnitudue earthquake than a 5.5 is 4,462,369,085,588,121 Joules greater than 5.5 scale.
What is the Richter magnitude scale?The Richter scale or the Richter magnitude scale is a measure of the strength of earthquakes, which are developed by Charles Francis Richter and was presented in his landmark 1935 review paper, where he called it the magnitude scale. This paper was later revised and renamed as the local magnitude scale, which is denoted as ML .
The Richter magnitude of an earthquake can be determined from the logarithm of the amplitude of waves which are recorded by seismographs.
The energy of the earthquake with magnitude 5.5 is 4,466,835,921,510 J and with magnitude 7.5 is 4,466,835,921,509,631 J.
The energy released = 4,462,369,085,588,121 Joules
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