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".
What is used to move fluid across the cell’s surface, or move the cell itself if it does not have flagella. A. Cilia B. Sodium-potassium pump C. Microtubules D. Flagella
Answer:
A. cilia
Explanation:
like flagella but smaller and around
A leukemia patient may suffer from low blood platelet count. What might occur because of the lack of platelets in the patient's blood?
A. The patient may develop lesions in the vein and artery walls where large clots will obstruct blood flow.
B.The patient may have internal bleeding and cuts may not stop bleeding.
C. The patient may suffer from many infections which could affect heart rate and blood pressure.
D. The patient may feel excessively tired because the blood cannot carry enough oxygen.
Answer:
B. The patient may have internal bleeding and cuts may not stop bleeding.
hopefully this helped :3
Answer:
Answer:C) The patient may have internal bleeding and cuts may not stop bleeding.
Explanation:
Platelets are cells that form scabs to help stop the bleeding of wounds. When you have low platelets, you can have fewer scabs at a time, so wounds will bleed more. If you have dangerously low platelets, any wound you have will not close and you will not stop bleeding without outside help.
Choose the incorrect statement from the following sentences. i.Chlorenchyma is specialized parenchyma that has chlorophyll pigment. ii.Apical meristem is responsible for growth of plants at root and shoot tips. iii.Parenchyma has thick cell wall and prominent nuclei. iv.Sclerenchyma gives stiffness and hardness to plants.
the third statement is wrong. Parenchymal cells have thin walls and the nuclei are not visible.
Describe under what conditions you might expect your cells to undergo anaerobic respiration. Be specific as to why these conditions would prevent normal cellular respiration to proceed. What product is produced under anaerobic conditions and is it harmful?
Answer:
Explanation:
Cells start undergoing anaerobic respiration when energy requirement is high and there is not sufficient availability of oxygen to produce required energy .
For example , when we we run fast , energy requirement by muscle cell is high but available oxygen level is not sufficient so cells start anaerobic respiration which produces lactic acid and this product creates tire-ness.
For normal respiration , oxygen is required . If there is lack of oxygen , aerobic respiration is not possible .
In yeast cells , alcohol is produced by anaerobic respiration. Alcohol is not harmful . In muscle cells , lactic acid is produced which is harmful .
What are two things that cause ocean waves?
Answer:
Wind, and movement.
Explanation:
Oil _____.
is a renewable resource
can be used directly from the ground
is the least polluting energy source
must be removed from the earth using drills
Oil well is a renewable resource
can be used directly from the ground
is the least polluting energy source
must be removed from the earth using drills
Some people have sustained brain damage and lost the ability to identify color. Other people sustained different brain damage and lost the ability to detect motion. What does this indicate about our visual system
Which of the following is a requirement for a population to be in Hardy-
Weinberg equilibrium?
A. One allele must provide a benefit.
B. The population must be very large.
C. There must be a high mutation rate.
D. Immigration must outpace emigration.
SUBMIT
Answer:
B. The population must be very large.
Explanation:
In this project, you will analyze claims about the causes of inherited genetic variation. You will then make your own claim based on prior knowledge. Next, you will defend your claim by conducting research to gather information that supports it. Finally, you will present your claim and defense in a typewritten paper.
Answer:
The two major causes of the inherited genetic variation are 1-mutations during DNA replication and 2-crossing over during meiosis
Explanation:
The mutations are changes in the genetic information that may be inherited when they occur in germline cells (i.e. sperms and ova). Mutations include single nucleotide polymorphisms (SNPs), insertions and deletions (collectively named indels), and major chromosome arrangements such as, for example, aneuploidy, centric fusion, duplications, etc. On the other hand, the crossing over or recombination is the exchange of genetic material between non-sister chromatids of homologous chromosomes during Prophase I of Meiosis. Recombination is a phenomenon that generates new genetic combinations in the gametes and thus increase genetic diversity. Both germline mutations and crossing over events increase genetic variation in the offspring of the next generation, thereby these phenomena represent sources of inherited variation.
what factor is found in a scientific claim
Answer:
similar results in multiple tests of the claim
Explanation:
on some of my study cards
Describe how Stella’s view of these plant cells and their parts changed as she transitioned through the three levels of magnification. Be sure to identify at least one cell structure or part of the leaf cells in your description.
Answer:
The three different views show different level of magnification.
Explanation:
At the first level the structure of plant cell is not clear however upon more magification the view is clarified and the upper epidermis and the lower epidermis are both visible in the third view which is the most magnified. The parts of leaf cell are visible the most evident of them is the epidermis which protects the outside of the cell and also Palisade Mesophyll is visible which helps in photosynthesis.
Answer:
At the first level, the structure of the plant cell is not as clear, but when the image is at 100x, the plant cell is magnified and a lot of detail can be seen. At 400x, which is the most magnified, the details are more and the image is larger, allowing Stella to take note of it. Palisade Mesophyll is part of the cells of the leaves and helps in photosynthesis.
Areas on the moon called maria Select one: a. are seas of water. b. consist of basaltic lava. c. formed a million years ago. Clear my choice
Areas on the moon called maria consists of basaltic lava. Option B is correct.
The areas on the moon called maria are not actually seas of water, as option a suggests. Instead, they are large, dark, flat areas on the moon's surface. These areas were formed by ancient volcanic activity.
Maria are made up of basaltic lava, which is a type of lava that is low in viscosity and can flow easily. When volcanic eruptions occurred on the moon in the past, this lava flowed out onto the surface and covered large areas, creating the maria.
These volcanic eruptions and the formation of the maria took place billions of years ago, not just a million years ago as option c suggests. They are remnants of the moon's early history when volcanic activity was more prevalent.
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In some ecosystems, mountain lions eat deer, coyotes, and rabbits. Which of the following terms best describes these mountain lions? A. Secondary consumers. B. Producers. C. Primary consumers. D. Decomposers.
they aren't decomposes or producers
obviously we'd know that
so the remaining options are
primary and secondary consumers
these rabbits and deer, coyotes
are the primary consumers
so, this lion is the secondary consumer
which is option A
Being a predator of different carnivores makes the mountain lion a secondary purchaser as opposed to a manufacturer, or a decomposer.
What are secondary purchasers?The organisms that eat the number one customers are meat-eaters (carnivores) and are referred to as secondary consumers. The secondary customers have a tendency to be large and fewer in quantity. This continues on, all the way up to the pinnacle of the food chain.
Which animals are secondary customers?In temperate regions, as an instance, you'll discover secondary clients inclusive of puppies, cats, moles, and birds. different examples encompass foxes, owls, and snakes. Wolves, crows, and hawks are examples of secondary consumers that reap their strength from number one purchasers through scavenging.
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Two dangers associated with the exposure of X-ray
Answer: Children are Especially Vulnerable to X-Ray Damage and Dental X-Rays Every Six Months, and Probably Every Year, May Cause More Harm Than Good
What two changes occurred on Earth during the most recent Ice Age?
Answer:
became very cold, most animals became extinct they did
Explanation:
correct is it
-yoda
The Two changes that occurred on earth during the most recent Ice age are :
The Weather was extremely cold Most animals went extinctThe recent Ice age
The last ice age occurred about 11700 years ago. This was a period when the glaciers covered most part of the earth. Because of the glaciers covering most parts the weather was extremely cold and this lead to the extinction of most animals that could not survive in severe weather conditions.
Hence we can conclude that the two changes that occured on earth during the most recent Ice age are :
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WILL MARK BRAINLIEST!!! AP BIOLOGY QUESTION
Elements bond together to make molecules essential for living things. Which of the following is used to build nucleic acids and some lipids?
Nitrogen
Phosphorus
Potassium
Calcium
Answer:
Nitrogen and Phosphorus
Explanation:
Nucleic acids and lipids are the major organic molecules that are essential for the survival of the living. Nitrogen is the element that builds nucleic acids and lipids. Thus, option A is correct.
What are nucleic acids and lipids?Nucleic acids are defined as biopolymers made of various monomeric units of nucleotides joined together. The nucleotides are composed of phosphate, sugar, and a nitrogenous base. They include RNA and DNA which are important genetic materials of the living. The nucleic acid is made of C, H, O, N and P.
On the other hand, lipids are the macromolecules that are made of fatty acids and glycerol that make them insoluble in water and they include oils and waxes. They are composed of carbon, oxygen, and hydrogen.
Therefore, option A. nitrogen makes the lipids and nucleic acid.
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A marine biologist discovers a new marine animal that has a coelom, but it does not develop from the mesodermal tissues. Under which category should she classify this animal? A. pseudocoelomate B. acoelomate C. coelomate
Answer:
A. pseudocoelomate
Explanation:
The body cavity of these animals is filled with fluids. Internal organs are covered by the fluid-filled space. The body cavity serves as the hydrostatic skeleton and has other functions such as digestion of food and waste removal.
What is the correct chronological order of important evolutionary events? Group of answer choices Evolution of bipedalism; regular use of stone tools; enlargement of brain to around 1,450 cc; increase in enamel thickness.
Answer:
evolution of bidepadlism,
increase in enamel thickness,
regular use of stone tools, enlargement of brain to around 1,450 cc
Explanation:
How will loud music affect the number of tadpoles that develop into frogs in a pond?
Answer:
the loud music may scare the frogs thus meaning they may not want to come out to mate
which of these is the most ethical reason for using a simulation rather than an experiment with live animals
Suzanne has type A- blood. Which blood type could she receive in a blood transfusion? A) A+ B) O- C) O+ D) B-
Answer:
Those with A+ can only receive red blood cells from A or O blood types.
Answer:
O-
Explanation:
because.
The Grey Cat.
Each day you take a walk at a different time following the same route. Along your path there is a bus stop with a bench located at the bottom of a hill. Upon this bench sits a grey cat. Each day, as you pass this grey cat, you say “hello cat”. You’ve recognized that each day, as you do this, a bus consistently comes over the hill. The consistency of this events sparks your interest, it seems to go beyond the possibility of coincidence. In order to satiate your curiousity you have decided to design an experiment to investigate the anomoly.
Working with just the information provided, create a GOOD Hypothesis about the above scenario. Generate an experiment to test your hypothesis, and write an experimental design. Your experimental design writeup must clearly define all essential aspects of the experiment.
Note: Avoid suppositions at all cost! Work with only the information provided. This is science.
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.
A normal chromosome and its homolog carrying an inversion are given. The dot (•) represents the centromere.Normal: A B C • D E F G H I JInversion: a b c • d g f e h i jWhat type of inversion is present and what is the name of the structure that will form during synapsis?
Answer:
Paracentric Inversion
Explanation:
Some of the mutations that occur in chromosomes involve inversions. These imply a structural change that affect the genes´ order in the chromosome.
In the inversion, the chromosome suffers two ruptures, and then it is reconstituted. The problem is that this reconstitution occurs inverted. These two ruptures might occur in the same chromosomic arm, or it might involve the centromere. The first case is known as paracentric inversion while the second case is called pericentric inversion. Note: The exposed example is a product of paracentric inversion, as the centromere is located between C and D genes, and the inversion involves E, F, and G genes.
During meiosis, when homologous chromosomes mate, and a structure known as inversion loop is formed. The chiasms within them make a place to inviable gametes. The crossover event inside the loop produces create a bridge between the two homologous chromosomes, and the fragment without centromemer is lost. After that, the bride breaks, and the two homologous chromosomes segregates. The final result is two viable gametes identical to the ones of the progenitors, and two inviable gametes, result of inversion.
Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely Group of answer choices
Answer:
the cell is most likely a plant cell in cytokinesis
Explanation:
Cytokinesis simply means the division of the cytoplasm. It happens after the telophase stage of the cell division and leads to the formation of two distinct cells.
Cytokinesis in animal cells involves the constriction of the plasma membrane from the equator of the cell outward until two distinct cells result. The process starts from the anaphase and continues through the telophase stage of the cell division.
Due to the presence of cell walls in plant cells, cytokinesis does not just involve the constriction of the plasma membrane but the formation of cell plates at the equator of the cell. The cell plate fuses with the plasma membrane, eventually dividing the cell into two with the formation of cell walls between the two membranes of the cell plate.
The cell is most likely a plant cell undergoing cytokinesis.
CYTOKINESIS:
Cytokinesis is the process whereby the cytoplasm divides into two halves. Cytokinesis proceeds nuclear or mitotic division. Cytokinesis occurs in both plant and animal cells with similar result, however, they occur differently. In plant cells, a cell plate forms in between the cell, which serves as the point of division into two cells. However, in animal cells, a cleavage furrow is rather formed. Therefore, the cell observed to be forming cell plate is most likely a plant cell undergoing cytokinesis.Learn more: https://brainly.com/question/10606931?referrer=searchResults
Modern domesticated pigs are descendants of the wild boar(Susscrofa). Through the domestication process, human have artificially selected for certain traits. Identify two of these traits, and briefly explain how they benefit modern society. Be sure to identify the trait, explain why it was artificially selected and how it benefits modern society.
Answer:
Meat for food and small size for pets
Explanation:
Artificial selection is the process by which humans control desirable phenotypic characteristics in plants and animals by applying selective breeding techniques to perpetuate these traits in the population. A example of artificial selection includes the process of domestication of modern pigs (Sus domesticus). It has been shown that the modern pigs derived from the wild boar (Sus scrofa), which were domesticated separately 9,000 years ago in China and Western Asia. For example, by artificial selection, humans have domesticated moderns pigs to use them as livestock for direct consumption (i.e., for their meat). Moreover, there are pig populations that have been artificially selected as pets (e.g., miniature Vietnamese Pot-Bellied pigs).
DNA is the genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes. Which statement accurately describe the variables in this study? A. The amount of folic acid and DNA synthesized are both dependent variables. B. The amount of folic acid and DNA synthesized are both independent variables. C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable. D. The amount of folic acid is the dependent variable, and the DNA synthesized is the independent variable. E. The amount of folic acid and DNA synthesized are neither dependent nor independent variables.
Answer:
The correct answer is - C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Explanation:
DNA is the genetic material of most of the living organisms. In this question, Joe wants to study to see the effect of folic acid on the synthesis of the DNA. Folic acid ae the essential nutrients or vitamin for the synthesis of nitrogen bases of the DNA that are purines and pyrimidines. A dependent variable and an independent variable are two important part of any experiment.
A dependent variable is a variable being tested and measured. In the experiment Jon is conducting, the amount of DNA becomes a dependent variable that is being tested and measured in the presence of folic acid. And folic acid is the independent variable tested to check the formation of DNA in bacteria.
Thus, the correct answer is - C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Answer:
The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Explanation:
Edmentum
what is the term that describes what occurs when genetic drift results in the formation of a new population that has less variation than the original population had A. Speciation B.Founder effect C.Mutation D. Sexual selection .
Answer:
A. Speciation
Explanation:
Speciation is how a new kind of plant or animal species is created. Speciation occurs when a group within a species separates from other members of its species and develops its own unique characteristics.
When the genetic drift occurs due to various factors and results in the formation of a new species it is called speciation. Thus, option A is correct.
What is speciation?Speciation is the formation of a distinct species from the original population because of the genetic drift that caused evolutionary changes essential for survival.
The species are separated from their original population leading to variation in the gene pool resulting in reproductive isolation and finally, the new species is formed.
Therefore, option A. speciation results in distinct species.
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_______identify the organ or structure Opening (valve) between stomach and small intestine.
Answer:
The pyloric sphincter valve
Explanation:
The pyloric sphincter is a thin, circular band of visceral muscle surrounding the pyloric opening at the inferior end of the stomach. It is found at the border of the stomach's final segment , the pylorus, and the small intestine's first segment, duodenum.
Gregor mendel concluyo que cada guisante tiene dos unidades para cada rasgo y cada gameto cotiene una unidad . Las unidades de mendel se conocen ahora como
Answer:
Las unidades de Mendel se conocen ahora como GENES
Explanation:
Durante sus experimentos, Mendel demostró que las características de las plantas de guisante (por ejemplo color de la flor, color de la semilla, forma de la semilla, altura de la planta, etcétera) eran heredadas, y denominó "elementos" a las unidades portadoras de dichas características. Es decir que cada elemento o unidad discreta, era el responsable de que la planta exprese una u otra característica. Estableció que estos elementos se redistribuían independientemente uno de otro, generación tras generación. Con el paso del tiempo y el avance de las investigaciones, estas unidades o elementos fueron denominados Genes.
A scientist is attempting to produce a large quantity of Insulin. In order to transfer the gene for Insulin production into the bacteria that will be
making it, the scientist should use an
A. Bacteriophage
B. Micropipette
C. Escherichia coli
D. Virophage
To transfer the gene for Insulin production into the bacteria that will be making it, the scientist should use a Micropipette. The correct option is B.
What is a micropipette?A micropipette is an electronic lightweight pipette. The topmost part is called the plunger, the bottom is the pipette from where the liquid is transferred. It has a measurement scale to measure.
The transfer of genes for insulin production. The gene transfer can be done accurately with measurement, so a micropipette will be used here.
Thus, option B. Micropipette is correct for the transfer of genes.
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