Answers
Answer:
The second option
Explanation:
The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume. That is why cells are so small.
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Related Questions
using a named examples explain the differences between a specific body defence mechanism and a non- specific body defence mechanism
Answers
Answer:
Specific body defence mechanism are resistance that are directed against only one specific invader while,
Non specific defence mechanism protects against any of an enormous range of possible dangers.
Explanation:
NON SPECIFIC DEFENCE MECHANISM are the first lines of general defence, they prevent entry and minimise further passage of microbes and other foreign material into the body. There are five main non specific defence mechanisms, these include:
--> defence at body surface
--> phagocytosis
--> natural antimicrobial substances
--> inflammatory response
--> immunological surveillance
Using PHAGOCYTOSIS as a named example of non specific defence mechanism. This involves phagocytes such as the macrophages and neutrophils which are able to trap any invading microbes either by engulfing them or by extending long pseudopodia towards them which grasp them and reel them in. These cells are NON SELECTIVE in their targets.
SPECIFIC BODY DEFENCE MECHANISM directs its actions against a specific invader. In addition immunological memory develops which confers long term immunity to specific infections. The immunity could be cell mediated or antibody mediated immunity.
Using CELL MEDIATED IMMUNITY as an example, Cytotoxic T-cells directly inactivate any cells carrying antigens. This means they are SELECTIVE in their targets. They attach themselves to the target cell and release powerful toxins, which are very effective because the two cells are so close together. This leads to destruction of abnormal body cells such as infected cells and cancer cells.
If a DNA strand has the following sequence, what is the sequence of the complementary strand?
ACCTAGTCG
Answers
Answer: TGGATCAGC
Explanation:
Please help, any unnecessary answers will be reported. Thanks :)
Answers
Pls help me and thank you so muchhh
Answers
Answer: the volume would total 120 cubic inches.
Explanation:
This is the equation: Volume = length x width x height. For example, if the measurements of your prism are 6 inches, 5 inches and 4 inches, the equation would look like this: Volume = 6 x 5 x 4.
in which does light travel fastest
Answers
Light waves do not need a medium in which to travel but sound waves do. Explain that unlike sound, light waves travel fastest through a vacuum and air, and slower through other materials such as glass or water.
Answer:
light travel faster in Vacuum and Air
use uterus and vagina in the same sentence
Answers
Answer:
Fertilized eggs attach to the sides of the uterus, which is in the vagina.
On the bottom of trophic pyramids are ____
1) secondary consumers
2)producers
3) decomposers
4)primary consumers
Answers
A student conducted an investigation to study gravitropism. The control group was planted normally, while the experimental group was planted upside down. After seven days, the control group looked normal. The experimental group after 7 days the roots started to grow toward the direction of gravity. Which statement best explains why the experimental group started to grow toward the ground?
Answers
Answer:
gravity?
Explanation:
What unit of time on Earth is based on the rotation of the Earth?
A.day
B.hour
C.month
D.year
Answers
Answer:
year
Explanation: Every year the earth rotates one time so that is right.
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A population of birds exhibits Type II survivorship. A predator is introduced that feeds on hatchlings, causing a change in the survivorship of the birds. Which of the following would most likely represent survivorship of the birds after the introduction of the predator? the answer choices are the images below.
Answers
Answer:
D
Explanation:
I took the test and got it correct
The fourth graph would most likely represent survivorship of the birds after the introduction of the predator. Thus, option D is correct.
What the population of birds exhibits Type II?A population of birds exhibits Type II survivorship. A predator is introduced that feeds on hatchlings, causing a change in the survivorship of the birds. A survivorship curve refers to a graph showing the number or proportion of individuals surviving to each age for a given species or group. There are three types of survivorship curves as follow:
Type I curves depict individuals that have a high probability of surviving to adulthood. For example, large mammals have type 1 survivorship curves, because they have a. low infant mortality and high rates of survival into old age.
Type II curves also called as intermediate type, it depict individuals whose chance of survival is independent of age. For example, most birds have type 2 survivorship curves birds die more or less equally at each interval of their age.
Therefore, The fourth graph would most likely represent survivorship of the birds after the introduction of the predator. Thus, option D is correct.
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The elements or compounds that are produced by a chemical reaction are called what?
Answers
Answer:
Product
Explanation:
When combining two elements or creating a compound, we can call the outcome a product
The predicted values for the four phenotypes form a ratio. The simulated values match this predicted ratio.
Answers
Answer: 9:3:3:1 and approximately
Explanation: just did it
Answer: 9:3:3:1 and approximately
Explanation: edge 2022
How does the aorta compare in size to the other blood vessels near it?
Answers
Answer: Its wider and thicker than most blood vessels
Answer: The aorta is the largest blood vessel in the body. This artery is responsible for transporting oxygen rich blood from your heart to the rest of your body. The aorta begins at the left ventricle of the heart, extending upward into the chest to form an arch.
Blood vessels are the channels or conduits through which blood is distributed to body tissues. The vessels make up two closed systems of tubes that begin and end at the heart. One system, the pulmonary vessels, transports blood from the right ventricle to the lungs and back to the left atrium.
Explanation:
What structures allow each protist to move?
Amoeba:
Euglena:
Paramecium:
Answers
Amoeba moves using pseudopodia.
Euglena moves using flagellum.
Paramecium moves using cilia.
What are the structures that allow the movement in different protists?
Pseudopodia, or protruding portions, are used by amoebas to move. Its meaning is "false feet." These are membrane elongations of the cell. With its pseudopod, an amoeba can reach out and grab a surface, using it to propel itself forward.Flagellums (plural flagella), a long whip-like structure that functions as a little motor, help euglena move. On the anterior (front) end, the flagellum spins in order to propel the cell through the water.Cilia have the ability to move in unison to advance a Paramecium. When a barrier is reached, the cilia travel in the opposite direction, somewhat reversing the Paramecium's forward motion.
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Rabbits must be always aware of predators that may catch and eat them. In
natural selection what would we consider these predators?
Answers
Answer:
There are many rabbit predators that will attack or eat the rabbit, including man. In fact, rabbits have more than most.
Explanation:
Depending in which part of the world you live, will determine the most likely predators you need to be aware of. With domestic/pet rabbits, perhaps the most common predators are pet dogs, pet cats and foxes. However, don't think these are the only ones. Many people are surprised to learn that large birds are a predator to rabbits, especially if the rabbit is a baby, young or a small breed type. Such birds, depending on where you live, include Hawks, Sparrow Hawks, Owls, Falcons, and kestrels. Other rabbit predators include Weasels, ferrets, badgers, stoats and snakes.
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Cells and transport proteins are physically prevented from passing through the filtration membrane. This has the following effect on filtration: Cells and transport proteins are physically prevented from passing through the filtration membrane. This has the following effect on filtration: increased osmotic pressure in the filtrate that draws plasma through the membrane decreased osmotic pressure in the filtrate that increases the amount of filtration increasing osmotic pressure in the glomerular capillaries that reduces the amount of filtration neutral change in osmotic pressure with no effect on filtration
Answers
Answer:
The correct answer is ''increasing osmotic pressure in the glomerular capillaries that reduces the amount of filtration.''
Explanation:
Osmotic pressure is understood to be the force that must be applied to a solution when the flow of solvent needs to be stopped by means of a membrane with semi-permeable characteristics.Colloidal osmotic pressure in glomerular capillaries: it is the pressure exerted by proteins in the blood, which tends to recover the filtered water. To generate and maintain glomerular filtration, filtration pressure is required. That is, glomerular filtration is a physical phenomenon regulated by hemodynamic changes that affect the glomerulus and, although it is the initial excretion mechanism, it is not the exclusive regulator. Water, ions and some nutrients are mainly reabsorbed in the proximal tubule by different mechanisms. The water will follow a passive transport process by osmotic drag. The activity of the tubule is highly dependent on maintaining a fluid osmotic pressure similar to that of plasma. Since proteins and other elements that participate in the maintenance of the plasma osmotic pressure do not cross the glomerular barrier, in the tubule, the isoosmotic pressure with the plasma is fundamentally conditioned by the content of water and salt (dissociated as chlorine and Na +) of the ultrafiltered.
Cells and transport proteins are physically prevented from passing through the filtration membrane for this the correct answer is to increase osmotic pressure in the glomerular capillaries that reducing the amount of filtration.
Osmotic strain is known to be the pressure that needs to be carried out to an answer whilst the glide of solvent wishes to be stopped with the aid of a membrane with semi-permeable characteristics.Colloidal osmotic strain in glomerular capillaries: it's far the strain exerted with the aid of using proteins withinside the blood, which has a tendency to get better the filtered water. To generate and keep glomerular filtration, a filtration strain is required.What is glomerular filtration?That is, glomerular filtration is a bodily phenomenon regulated with the aid of using hemodynamic modifications that have an effect on the glomerulus and, even though it is the preliminary excretion mechanism, it isn't the different regulator.
Thus it is clear that the above answers are well explained.
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PLS HELP IVE BEEN ASKING FOR 2 DAYS OML NOBODY WILL HELP ;( ME GO CRY
Answers
Answer:
A.
Explanation:
Bc the rest are not reasonable
Answer:
A. to maintain desirable traits
Explanation:
I'm positive that this is correct
2. What is plate tectonics?
a. The joining of the Earth’s plates into one plate
b. Movement of the Earth’s plates on the mantle
c. The ring of volcanoes around the Pacific Ocean
d. The way scientists measure earthquakes
Answers
Answer:
Suppose we add up alternate Fibonacci numbers, Fn-1 + Fn+1; that is, what do ... L(1)=1 and L(3)= 4 so their sum is 5 whereas F(2)=1; L(2)=3 and L(4)= 7 so their ... What is the relationship between F(n-2), and F(n+2)? You should be able to find a ... Fib(N); K (an EVEN number!), Lucas(K) and Fib(K) in each expression like ...
Explanation:
Summarize the benefits and drawbacks of becoming a veterinarian,
Answers
Answer:
Drawbacks: Veterinary school is long and extensive, some surgeries can take hours, sometimes you may get an uncooperative animal, you might have to deal with putting an animal down, which can be hard. You also might be scared for live with graphic images, lol.
Benefits: Vets get paid a lot, they help animals, they help animals live the best life, people are VERY appreciative of the work they do for animals, they are always around animals, so they may see the cutest puppies!
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Tendrá la intensidad de la luz un efecto en la velocidad de la fotosíntesis, cuando los períodos de exposición están limitados a la duración normal de la luz para una planta
Answers
Answer:
ver explicacion
Explanation:
La fotosíntesis es el proceso mediante el cual las plantas verdes fabrican su propio alimento en presencia de luz solar, clorofila, dióxido de carbono y agua.
La intensidad de la luz afecta la tasa de fotosíntesis, cuanto mayor es la intensidad de la luz, mayor es la tasa de fotosíntesis y viceversa. Cuando hay una mayor intensidad de luz, hay más luz disponible para impulsar las reacciones de la fotosíntesis.
Which is the answer?
Answers
I thin the answer is b I think I hope I'm sure did u pass it
Which of the following statements are true?
A All compounds are molecules, but not all molecules are compounds.
B All molecules are compounds, but not all compounds are molecules.
Something is either a compound or molecule, it can never be both.
D
Molecules and compounds mean the same exact thing.
Answers
Answer:
I think A is true
Explanation:
Any combination of atoms is a molecule, but when its a combination of atoms from different elements, its known as a compound.
Which best describes a possible negative impact of irrigation of farmland?
Answers
Answer: Food can be produced in dry areas. Increased runoff can pollute bodies of water. Food can be produced through drought years. Water can improve the livelihood of farmers.
Answer:
B. Increased runoff can pollute bodies of water.
Explanation:
Hi. Is this correct?????
Answers
Answer:
Yes, that is correct.
Explanation:
Describe the animal, the crayfish
Answers
Answer:
Hey mate......
Explanation:
This is ur answer......
Crayfish is a nocturnal freshwater crustacean that resembles a small lobster and inhabits streams and rivers.Hope it helps!
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enzymes for carbohydrates
a insulin
b protease
c lipase
d amylase
Answers
Answer:
maybe its B
but dont qoute me on that
Darwin's theory of natural selection
Answers
Darwins theory of evolution by national selection
more individuals are produced each generation that can survive. phenotypic variation exists among individuals and variation is heritable
what is the number of cells at the beginning of meiosis
Answers
is this in order ?
if not could you reorder them ? thank you.
! no links pls !
Answers
Answer: Eukaryotic Cell, Nucleus, DNA, Chromosome, Gene, and Allele.
Explanation:
Which best describes an acid?
(F)
a soapy substance that is nonreactive
with metals
(G)
a neutral substance made of oppositely
charged particles
(H) a caustic substance that has a high
number on the pH scale
(I) a sour liquid that forms gas bubbles
when mixed with copper
Answers
Answer:H) a caustic substance that has a high
number on the pH scale
Explanation: