Answer: Capillaries pass oxygen and waste between blood and cells.
Explanation: Capillaries are very thin-walled tubes that connect the arteries to the veins. The walls of these tubes are only one cell thick. Capillaries are found everywhere in the body. These thin tubes allow the food, oxygen, and waste to move between the bloodstream and cells. Waste products pass into capillaries and are carried by the veins to be disposed of in other parts of the body. Capillaries are the only blood vessels thin enough for materials to pass back and forth between cells and blood.
Blood Capillaries pass oxygen and waste between blood and cells. Thus option A is correct.
What are the function of blood capillaries?Capillaries are small type of blood vessels where a single red blood cell can barely fit in them.
They involve in the connection of arteries and veins, facilitate the exchange of certain elements between blood and tissues.
They involve in exchange of oxygen, nutrients, and waste between blood and tissues by two major process called passive diffusion and pinocytosis.
In passive diffusion the movement of a substance from the region of higher concentration to the region of lower concentration occur.
In Pinocytosis, intake of small molecules by the cell of the body like fats and proteins.
The capillaries wall are composed up of endothelium which is a thin cell layer called and surrounded by another thin layer called a basement membrane.
Thus option A is correct.
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Patio and papio cynocephalus do not belong in the same
Patio and papio do not belong in the same species.
The trp operon encodes the genes required to synthesize tryptophan. This operon is regulated by a feedback loop in which tryptophan binds to a transcriptional regulator leading to a change in gene expression from the operon. This is most likely an example of__________. a. inducible gene expression b. repressible gene expression c. constitutive gene expression d. post-translational regulation of gene expression
Answer:
The correct answer is option b. "repressible gene expression".
Explanation:
The trp operon is a classic example of a repressible gene expression. The trp operon controls the biosynthesis of tryptophan from an initial precursor by encoding five genes that translate to three enzymes. These enzymes act as regulators and tryptophan itself acts as the final regulator. Tryptophan inhibits its own production when it binds to the transcription regulator, therefore it is an example of a repressible gene expression.
The energy used in photosynthesis come from what??
Answer:
chloroplasts.
Explanation:
Chloroplast
Chloroplasts are organelles that conduct photosynthesis, where the photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in plant and algal cells. They then use the ATP and NADPH to make organic molecules from carbon dioxide in a process known as the Calvin cycle. Chloroplasts carry out a number of other functions, including fatty acid synthesis, much amino acid synthesis, and the immune response in plants. The number of chloroplasts per cell varies from one, in unicellular algae, up to 100 in plants like Arabidopsis and wheat.
-Also this is science- Which substance would heat up the most during a sunny day, and why?
Air, because it needs the most amount of energy to raise its temperature.
Seawater, because it needs the least amount of energy to raise its temperature.
Sand on the shore, because it has a relatively low specific heat.
Fresh water, because it has high specific heat
Answer: C.
Explanation: Sand because solid molecules are the closest together, and thus causing heat to transfer the fastest.
Answer: C.
Explanation: Sand because solid molecules are the closest together, and thus causing heat to transfer the fastest.
Ways to calculate an "average" include
A. mean, median, and mode
B. mean, median, and percent
C. mean, percent, and mode
D. percent, median, and mode
What roles do species play in ecosystems?
There are some species in every ecosystem that are necessary for the other species in the system to survive. The ecosystem may not be able to continue functioning without the keystone species, which could be a small plant or a large predator.
What are keystone species ?
Scientists may argue over which organisms or plants in a given ecosystem should be called a keystone species because a keystone species does not have a formal name. The idea, according to some wildlife scientists, oversimplifies the role of a single animal or plant in intricate food webs and habitats. On the other hand, referring to a specific plant or animal as a "keystone species" in an ecosystem is one way to educate the general public about how crucial one species can be to the continued existence of numerous others.There are three sorts of cornerstone species referred to by numerous researchers: mutualists, ecosystem engineers, and predatorsThe "keystone" is regarded as one of the most crucial components in any community or arrangement. An organism that contributes to the stability of the system is known as a keystone species in any kind of ecosystem, including marine ecosystems. Ecosystems would look very different without its keystone species. If their keystone species vanished, some ecosystems might not be able to adjust to changes in the environment. That could result in the ecosystem's demise or it could allow an invasive species to take control and significantly alter the ecosystem's course.To know more about keystone species check this:
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2. What is the dependent variable?
O The color of light
O The amount of water
O the number of leaves
O The species of plant
Answer:
I want to sat the number of leaves
Explanation:
I'd have to see like the whole question and background information though-
RNA is chemically similar to DNA except that its sugars have an additional oxygen atom,
and the base thymine is replaced by a structurally similar base called
I can give you one answer and that is that im sure the answer has a weird name so sara is out of the question.
13. Galapagos finches are birds that live on islands
off the coast of South America. The finches on the
various islands are very different from each other.
As a result of the different food resources on the
islands, which of the following structures of the
Galapagos finches experienced the greatest
change through natural selection?
(5 Points)
Head size
Eye shape
Feather color
Beak shape
Galapagos finches experienced the greatest change through natural selection in the beak shape. The correct option is D.
What is natural selection?Natural selection is the variation in individual survival and procreation brought on by phenotypic variances.
The evolution of a population's heritable features across generations is a fundamental mechanism of evolution.
Short beaks of Darwin's finches proved to be an adaptation that rendered them better adapted to grub-eating and poking holes in the ground.
However, Darwin's theory of natural selection was strengthened by Galapagos finches.
Until they all split off to become separate species, Darwin's Finches' advantageous characteristics were chosen for over many generations. These birds possessed distinct beaks, although being almost identical to mainland finches in all other respects.
Thus, the correct option is D.
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A sudden increase in the amount
of available nutrients can create
problems for an aquatic
ecosystem. How?
A. Large numbers of producers can confuse
herbivores.
B. Increased nutrients can cause producers to
compete aggressively with one another.
C. There is not enough oxygen in the
atmosphere to support excessive numbers of
aquatic plants.
Answer:
C
Explanation:
There would be a high amount of nitrates and phosphates, which reduces the amoubt of oxygeb in the tank, that will lead to the difficulty of supportibg the excessive amount of aquatic plants.
Answer:
C. There is not enough oxygen in the
atmosphere to support excessive numbers of
aquatic plants.
Explanation:
n excess amounts, both nutrients can cause an increase in aquatic plant growth and algae blooms, called eutrophication. These algae blooms live at the water surface, in order to easily access oxygen and sunlight. As a result, eutrophication prevents lower water levels from access to sunlight and oxygen in the air.
According to the chart on the content page, which biological molecules have carbons in a ring shape as a part of their structure?
A primitive eukaryote was discovered that displayed a unique nucleic acid as its genetic material. Analysis provided the following information: (a) The general X-ray diffraction pattern is similar to that of DNA but with somewhat different dimensions and more irregularity. (b) A major hyperchromic shift is evident upon heating and monitoring UV absorption at 260 nm. (c) Base-composition analysis reveals four bases in the following proportions. Note that xanthine and hypoxanthine are both purines. (d) About 75 percent of the sugars are deoxyribose, while 25 percent are ribose. Part A Based on these findings, which characteristics does this unique nucleic acid have
Answer:
c and d
Explanation:
(C) Even though this option seem incomplete, the information revealed also shows it's unique.
One characteristic this nucleic acid has that is different from other nucleic acid is the purines. The purines in both DNA and RNA are adenine and guanine while this nucleic acid has xanthine and hypoxanthine which are the found in the tissues and fluids of other organisms.
(d) Also, it's nucleotide has a mixture of two types of ribose sugars which is unusual because a DNA molecule has deoxyribose sugar while a RNA molecule has a ribose sugar - none of the two nucleic acids have a mixture of both types of sugar.
Describe how skin pigmentation is determined, and also
how it is affected by exposure to the sun.
Answer:
pigmentation is determined by the amount of melanin in the skin. Without melanin, the skin would be pale white with shades of pink caused by blood flow through the skin. The extra melanin makes your skin look darker or sun-tanned. In some cases, the sun causes an uneven increase in melanin production, which produces irregular coloring of the skin. The sun can also cause a permanent stretching of small blood vessels, giving your skin a mottled, reddish appearance.
Explanation:
Digestion of food and batteries are an example of which type of energy?
A. Chemical
B. Kinetic
C. Heat
D. Electrical
Which statement best describes weather?
A The temperature is increasing as the cloud cover decreases.
B Wind speeds are greatest during the spring.
C Since 1970, yearly rainfall averages are lower than usual.
D Flash flooding has increased in many areas during the last few decades
True or False. If gametes were produced in the same way as daughter cells in mitosis, there would be a doubling of the chromosome number at fertilisation.
Answer:
true im pretty sure
Explanation:
HELPPP WILL MAKE BRAINILEST! Which of the following is NOT part of the chromosomes?
A)sex chromosomes.
B)Zygote.
C)Chromatin.
D)Centromere.
E)Autosomes.
Answer:
i think its e
Explanation:
Answer:
d
Explanation:
What animals live in the marianna trench?
Answer:
xenophyophores, amphipods and small sea cucumbers (holothurians)
Explanation:
Answer:
The three most common organisms at the bottom of the Mariana Trench are xenophyophores, amphipods and small sea cucumbers (holothurians), Gallo said. The single-celled xenophyophores resemble giant amoebas, and they eat by surrounding and absorbing their food.
Explanation:
Hope this helps:)
Question: Maya designed an experiment to see how much rain falls off the leaves of plants of this type. She placed collecting trays under the leaves and experiment could be repeated. Which of these is NOT a reason why is it important that Maya's experiment can be repeated by someone else. A.to prepare for future experiences B. to show all the error she made in her experiment
C. so other people can see if result were correct D. so other can develop their own search of her work.
Answer: D (so other can develop their own search of her work.)
Someone else does not need to develop their own search of Maya's work. Maya has already completed the experiment. So, the answer to the question should be option D.
Hope this helps!
If conducted accurately identical investigations should produce similar results. Sometimes, errors like measurement errors, can
cause differences in results
Sandra and Jeremy are neighbors who tested different brands of seeds in their gardens for six weeks. They grew identical gardens
in their yards and recorded results. Each of them tried three brands of pea plant seeds and recorded the plants' heights at the end
of each week. They discovered Jeremy's plants were much taller on average than Sandra's plants every week.
Which statement describes a measurement error that may have caused such a significant difference in their results?
Sandra recorded her measurements in centimeters, while Jeremy recorded
his measurements in inches.
They both took measurements on Fridays, but Sandra took hers at 4:00 PM
and Jeremy took his at 5:00 PM
Sandra used a measuring tape to collect data, while Jeremy used a wooden
tuler to take his measurements
mining
D
Sandra measured her plants from the ground while Jeremy measured his
plants from the ends of their roots
Answer:
D Sandra measured her plants from the ground, while Jeremy measured his plants from the ends of their roots.
Explanation:
The statement that describes a measurement error is Sandra measured her plants from the ground while Jeremy measured his plants from the ends of their roots.
What do you mean by Seeds?Seeds may be defined as the unit of reproduction of a flowering plant, capable of developing into another such plant.
Three brands of pea plants are grown in the field of equal dimension, still, there may be a difference in their height that must be identified. This is surely due to a measurement mistake.
Therefore, it is well described above.
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Removing a specific group of trees within a small area over a long period of time is
Answer:
Deforestation
Explanation:
Deforestation
what is the key to stabilizing global population?
Which of the following is NOT one of the potential mechanisms allowing kin recognition among animals? Group of answer choices kin-differential spatial association, so that kin are reliably found in a given place phenotype matching, whereby kin are identified through comparison of their phenotypic attributes with those learned from reliable kin, including oneself kin-differential familiarization, whereb social familiars are treated as relatives. kin-branding, whereby all individuals are labeled actively by each other at birth so that kin can be discriminated from nonkin. genetic similarity detection, whereby phenotypic labels are correlated with one's underlying genotype, allowing for kin discrimination based on that.
Answer:
The correct answer is "kin-branding, whereby all individuals are labeled actively by each other at birth so that kin can be discriminated from nonkin".
Explanation:
Kin recognition, also known as kin detection, is an ability developed by some animals to detect organisms that are genetic related and discriminate among other animals that are not (nonkin). There are some mechanisms that animals use for kin recognition, however labeling actively each other is not one of them. In most cases, animals use kin recognition based on pheromonal cues.
que son los radicales
Answer:
un radical es un átomo, molécula o ión que tiene un electrón de valencia no apareado. Con algunas excepciones, estos electrones desapareados hacen que los radicales sean altamente reactivos químicamente.
Explanation:
Help guys I need this ASAP
Answer:
Probably A
Explanation:
hey guys i found this bug inside my house and i have no clue what it is any help? i get a couple of them every month
Answer:
Oh I see those in my house too. they freak me out like what if they are in my bed
Explanation:
.
what is quardratic equation ??express its formula .....!please gyus follow me
Which of these is the most sustainable city?
A. Johannesburg, South Africa
B. Helsinki, Finland
C. Reykjavik, Iceland
D. Gothenburg, Sweden
Answer:
D
Explanation:
Norway has overtaken its neighbor Sweden to become the world's most sustainable country, RobecoSAM's latest Country Sustainability Ranking reveals.
During the action of a sodium-potassium pump, 50 ATP molecules were spent. Predict how many sodium ions are transported across the cell membrane. A. 50 B. 100 C. 150 D. 200
Answer:
150
Explanation:
each atp moves 3 Na+ and 2 K+ molecules
In rats, gene B produces black coat color if the genotype is B–, but black pigment is not produced if the genotype is bb. At an independent locus, gene D produces yellow pigment if the genotype is D–, but no pigment is produced when the genotype is dd. Production of both pigments results in brown coat color. If neither pigment is produced, coat color is cream. Determine the genotypes of parents of litters with the following phenotype distributions. Part A 4 brown, 4 black, 4 yellow, 4 cream
Answer:
Bbdd and bbDd
Explanation:
From the illustration:
B_dd - black color
bbD_ - yellow color
B_D_ - brown color
bbdd - cream color
In order to produce litters in the ratio 4 brown, 4 black, 4 yellow, and 4 cream; the genotypes of the parents must be Bbdd and bbDd. The cross between the two parents would be such that:
Bbdd x bbDd
4 BbDd - brown color
4 bbDd - yellow color
4 Bbdd - black color
4 bbdd - cream color
See the attached image for the Punnet's square analysis of the cross.
