Answer: It is when the population growth rates are regulated by density of a population. This is important in a multicellular organism for several reasons. It would affect the birth and death rates of the organism.
Explanation:
Density dependence refers to the dependence of population growth on density. Natality and mortality rates depend on the number of individuals. The concept is closely related to competition between individuals for resources.
---------------------------
The concept is related to the logistic growth model.
Populations that express a logistic growth model are mostly composed of multicellular organisms.
Population growth depends on density. Natality and mortality depend on the population size, meaning that there is no independence between population growth and population density.
When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate.
The population per capita growth rate decreases as population size increases.
While growing, the population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.
K is a constant that equals population size at the equilibrium point, in which the natality and the mortality rate get equal to each other.
Assuming that population size is N, when
N<K, the population can still grow. N approximates to K, the population´s growth speed decreases. N=K the population reaches equilibrium, N>K, the population must decrease in size because there are not enough resources to maintain that size.Usually a sigmoid curve represents the logistic growth model.
So what does it mean?
That the natality and moratality rate depends on the number of individuals in the population.
As the population grow, the number of individuals increases, and competition for resources increases.
When the population reaches the critical point of being equal to carrying capacity, means that the environment can not support more individuals.
There are not enough resources for all of them, and competition increases affecting the reproductive rate and population growth.
So after this point, the population size decreases.
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Which statement best describes cellular respiration?
Cellular respiration is a process that produces ATP from NADP
Cellular respiration is a process by which all organisms convert sugar into kinetic
energy
Cellular respiration is identical to photosynthesis
The products and reactants of cellular respiration are the same
the primary wave is the slowest wave among the seismic waves true or false
help fast with homework
The broad waves of related waves is called: : Radiation Spectrum Force Energy please help
Answer:
The asnwer is spectrum
Explanation:
A type of behavior an organism is born with is a(n) response. O A. learned B. synthetic O C. innate OD. preventative
Answer:
(C) Innate response.
Explanation:
An organism's innate response is the one that it is born with. Instinct. Something that comes... from within it. :)
Which one of the following is not made of calcite?
a. chert
b. travertine
c. chalk
d. coquina
HELP ME HURRY PLEASE
Answer:
people think science tests should be more hands on opposed to sitting down in on spot for hours. I think it should be hands on so kids can remember and have a fun time doing so.
Explanation:
(go into more depth and add more words.)
Please help I'm in a test...
The process that transport rocks, soils, and sediments to a different location is called _____.
A Weathering
B Erosion
C Deposition
Answer: B
Explanation: I had a test with this question and got it right
A geneticist crossed tall pea plants and obtained 971 tall pea plants and 315 short pea plants in the F, generation.
TT
What were the genotypes of the parents that produced the offspring in the Punnett square shown, it T is the allele for tall, and t is the allele
for short?
ATT
BTT
D. TITI
Answer:
BTT Esa es la respuesta gracias
Answer:
B. TT
Explanation:
I took the test
Which is a difference between plant and animal cells?
A) An animal cell can produce energy, because if has mitochondria.
B) A plant cell has a well defined shape, because it has a cell wall.
C) A plant cell can store genetic information, because it has a nucleus.
D) Molecules can only pass into an animal cell because it has a cell membrane.
Answer:
B. A plant cell has a well defined shape because it has a cell wall
Explanation:
When you compare an animal cell to a plant cell you can see that a plant cell has a cell wall while and animal cell only has a cell memebrane. The cell walls of the plant help the plant by providing support and keeping it's shape.
The difference between plant and animal cells is plant cell has a well defined shape, because it has a cell wall.
What are the functions of cell wall?The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.
The main functions of the cell wall are to provide structure, support, and protection for the cell. The cell wall in plants is composed mainly of cellulose and contains three layers in many plants.
The cell wall is composed of a network of cellulose microfibrils and cross-linking glycans embedded in a highly cross-linked matrix of pectin polysaccharides.
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How is a polar molecule different from a nonpolar molecule?
A.polar molecules have charges separated like poles of a magnet.
B. Polar molecules have charges evenly distributed across their poles.
C. Polar molecules are attracted to the lipids of the phospholipids of the plasma membrane.
D. Polar molecules are always larger than nonpolar molecules.
Answer: I think its b
Explanation:
if not a
A polar molecule is different from a nonpolar molecule in the fact that a polar molecule has charges separated like the poles of a magnet. Thus, the correct option for this question is A.
What is a Polar molecule?A polar molecule may be defined as a type of molecule in which one end of the molecule is slightly positive, while the other end is slightly negative. For example, water is an example of a polar molecule.
Being a polar molecule, water is separated by a positively charged hydrogen atom and a negatively charged oxygen atom. Polar molecules are asymmetric in nature and significantly contain lone pairs of electrons on a central atom or atoms with different electronegativities bonded together.
Non-polar molecules are symmetric with no unshared electrons. These molecules have resulted from an unequal distribution of electron density.
Therefore, polar molecules have charges separated like the poles of a magnet. Thus, the correct option for this question is A.
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who do this please
Which of the following best describes the role of roots and stems in a plant?
Roots and stems transport water and minerals to the leaves so that photosynthesis
can occur.
Roots and stems help the plant move and keep cool in hot weather.
Roots and stems transport water and minerals to the flower to attract bees so that
pollination can occur.
Roots and stems are where photosynthesis takes place
Answer:
Roots and stems transport water and minerals to the leaves so that photosynthesis can occur
Explanation:
What are some similarities and differences between the two broad categories of cells
Answer:
Prokaryotes Vs. Eukaryotes
- Prokaryotes have a nucleoid, eukaryotes have a nucleus
- Prokaryotes do not have membrane bound organelles, eukaryotes do have membrane bound organelles
- Prokaryotes have a cell membrane, and so do eukaryotes
- Prokaryotes have ribosomes, and so do eukaryotes
What r the types of allergy??????
Answer:
of Allergies
Drug Allergy.
Food Allergy.
Insect Allergy.
Latex Allergy.
Mold Allergy.
Pet Allergy.
Pollen Allergy.
Explanation:
Answer:
food, flowers, touch, dirt etc/
Explanation:
I need help now!!
Which of the following best describes why a cell would not be able to reproduce if its
nucleus were damaged?
A. The nucleus is responsible for creating the sugars needed to perform cell division.
B. The nucleus is responsible for creating the energy used to perform cell division.
C. The nucleus is responsible for housing the genetic information needed for cell
division.
D. The nucleus is responsible for letting the materials in that are needed for cell division.
Answer:
B
Explanation:
I don't know...but I think the answer is B
how does latitude affect a climate zone
Help!! it’s for a test!!
Identify the boundary separating watersheds?
A. Drainage basin
B.Valley
C. Plateau
D. Divide
Sickle-cell anemia is an autosomal recessive condition. This means that:
a. Two copies are needed for the condition to occur
b. Individuals can be a carrier for the condition
c. Families can go many generations without realizing that it occurs in their family
d. All of the above.
Answer:
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Low genetic variation or a lack of genetic diversity increases the risks of extinction. Scientists have observed this in cheetah populations. Captive feline cheetahs at a breeding colony for large cats were exposed to a viral pathogen that killed roughly 50% of the cheetah population. None of the lions in the large cat population developed symptoms or were affected. Scientists know that lions have a more extensive genetic variation, which means they had the gene variations in their immune system necessary to fend off the disease. Describe the evidence that supports how the cheetah population is likely experiencing a lack of genetic diversity. Suggest one way humans can intervene to increase genetic diversity. Predict a potential adaptation that could result from this increase in diversity. (Please be longer than a few sentences)
Answer:
Because the pathogen killed off 50% of the population that means half of the population was susceptible to the disease, meaning that genetic variation is incredibly low because 50% of the species is the same. Humans can fix this by interbreeding cheetahs with different traits, or even breed them with a different species that is compatible for reproduction.
Explanation:
Half of the population was susceptible to the disease since the pathogen killed off 50% of the population, which means that genetic variation is extremely minimal because 50% of the species are the same.
What is genetic diversity?Genetic diversity refers to the total number of genetic traits that make up a species' genetic composition.
It varies greatly depending on the number of species present as well as across species, and it can be linked to a species' longevity.
A group that is genetically homogeneous and exposed to a new pathogen without the gene variant to stop the disease could go extinct.
By performing a skin graft surgery where a portion of skin from a donor cheetah is given to a recipient cheetah, which is easily accepted if it is an inbred population, evidence to support the loss of genetic diversity of the cheetah population can be gained.
By implementing captive breeding programs, encouraging females to breed with various males in order to produce offspring with various traits, protecting the natural habitat, fostering coexistence of the cheetah species with other species and humans.
Also reducing competition for the same food source, we as humans can take action to increase the genetic diversity in the cheetah population.
Thus, these are the evidence that supports how the cheetah population is likely experiencing a lack of genetic diversity.
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Three specific anatomical structures that make monkeys special or at least different and successful in its natural environment.
Answer:
Monkeys unlike most mammals (besides humans) have imposable thumbs which helps them to climb trees and open nuts and fruits.
Monkeys also have powerful tails which they use to hang on branches and to assist them in balance.
Along with imposable thumbs and strong tails, monkeys have long and flexible legs and arms which makes it easy for them to get around and climb trees.
I hope this helps! :)
The brain is formed by a variety of nervous tissues and connective tissues. The tissues are highly organized and work together to complete a variety
of tasks
How is the brain classified?
А. tissue
B. organ <
C. organ system
D. organism
_______ are created through the process of translation
1. lipids
2. proteins
3. nucleus acids
4. carbohydrates
Answer:
2 proteins
Explanation:
The protein synthesis occurs in two steps, namely transcription and translation
Which of the following characteristics evolved as a result of the evolution of a larger brain size?
adaptive human body type
use of symbols
walked upright
use of tools to get food
Answer:
blood
Explanation:
use food can help my brain or water can help work my brain use blood
Answer:
use of symbols
Explanation:
A larger brain allows for more intelligence. To use symbols, you need more intelligence
Anatomy and physiology chapter 1
Answer:
whats the question?
Explanation:
i dont see it
Sexual and asexual reproduction allow for transfer of genetic material to offspring. Which
of the following is true regarding how asexual reproduction differs from sexual
reproduction?
1.Asexual reproduction is for changing environments, sexual reproduction is for stable
environments
2.Asexual reproduction produces genetically identical offspring; sexual reproduction
produces genetically different offspring.
3.Meiosis is a form of asexual reproduction; mitosis is a form of sexual reproduction
4.Asexual reproduction is for plants; sexual reproduction is for animals,
answer: asexual reproduction produces genetically identical offspring; sexual reproduction produces genetically different offspring
explanation:
asexual reproduction is when a single organism uses its own DNA as a template to create another organism (through binary fission, fragmentation, budding, etc.) that is genetically identical
sexual reproduction is when two organisms create a combination of DNA (through a mixing of genes during meiosis, reproduction, etc.) to create an organism that is genetically different
*FIRST CORRECT GETS BRAINLIEST AND 25 POINTS*
Answer:
needs more information to answer
A type of cellular transport is shown.
ATP
Which description best identifies this type of cellular transport?
Answer:
I would say A
Explanation:
I looked at my ap bio notes
How do scientists learn about the age of the solar system and its planetary bodies? Select the two correct answers.
a. comparing the composition of the gaseous planets to the rocky planets
b. using radiometric dating of meteorites
c. measuring distances between planets
d. analyzing impact craters on planetary body surfaces
Answer: B, C
Explanation: Scientists use radiometric dating of meteorites and analyze the impact craters on planetary body surfaces to learn about the age of the solar system and its planetary bodies.
Using radiometric dating of meteorites and analyzing impact craters on planetary body surfaces are the two methods that tells us about the age of solar system.
The age of solar system and its planetary bodies can be find out by using radioactive dating techniques. Scientists have find out that the Solar System is 4.6 billion years old due to this technique. The other way to find out the age of solar system and its planetary bodies by counting the number of impact craters occurs on planetary body surfaces so these two methods provides information about the age of solar system and its planetary bodies
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Comet tails _____.
always point toward the sun
are only seen when comets are near the sun
are caused by intense air friction
are made of carbon and magnesium
Answer:
always point toward the sun
Explanation:
Answer:
are only seen when comets are near the sun
Explanation:
The characteristic "tail" of a comet is only visible when it is close to the sun. The center of a comet is a solid mass, called the nucleus, made of ice, frozen gas, rock, and dust.