Which of the following must be true for natural selection to occur?
O A. The ecosystem cannot contain predators.
B. A population cannot have competition for resources,
C. A population must be stable.
D. The ecosystem must have limited resources,

Answers

Answer 1
D. The ecosystem must have limited resources

Related Questions

The increase in temperature with depth in the Earth is called the geothermal ____

Answers

Answer:

Geothermal gradient

Explanation:

Answer:

.energy..

Explanation:

We use electrical devices that produce motion, light, and sound. Which aspect of energy explains why these devices are possible?

Answers

Answer:

The suns energy or the solar energy

Explanation:

Pls Answer it for 50 points pls What is arsenic???

Answers

Arsenic is natural element widely distributed in the earth's crust.

There are two forms of arsenic organic and inorganic.

Symbol: As

Electron configuration: [Ar] 3d¹⁰4s²4p³

Atomic number: 33

Atomic mass: 74.9216 u

Electronegativity: 2.18

Answered by Gauthmath must click thanks and mark brainliest

Which major processes were needed for the origin of life on Earth?

Answers

Answer:

I think it's a climate

Which of these is the main cause of habitat fragmentation? O A. Reduction in genetic diversity O B. Migration of mammal species O C. Demand for land use O D. Extinction of bird species​

Answers

Answer:

C. Demand for land use

Explanation:

Habitat fragmentation usually occurs because of human activities such as new roads, parking lots, and housing developments. Organisms need their specific habitat for survival, and fragmentation is a leading threat to many terrestrial animals.

Why is avian influenza (H5 N1) rarely transmitted from poultry to humans? Why is it is often lethal
in humans? Why is it rarely spread from person to person?

Answers

Answer:

Lacks the right key to unlock many cells.

Explanation:

Avian influenza (H5 N1) rarely transmitted from poultry to humans because it lacks the right key to unlock many cells in the upper respiratory tract so due to this action the virus is rarely transmitted to humans. Sometimes it is lethal to humans due to absence of antibodies for this type of virus. It is rarely spread from person to person due to inability to enters the other human body.

What is the powerhouse of the cell called?

Answers

Mitochondria is called the powerhouse of the cell.

Hope this helps! Have a great day :)

Mitochondria are known as the “powerhouse of the cell.”

In the Avery, MacLeod, and McCarty experiment, the transforming extract from virulent bacteria was treated with DNase, RNase, or protease before being mixed with nonvirulent bacteria. The appropriate control for this experiment is to treat the transforming extract from heat-killed virulent bacteria with:

Answers

Answer:

Nothing

Explanation:

A. Control variables generally entail little or no system change. To see if the method worked, the researchers required a positive control in which the heat-killed virulent bacteria invariably transformed the non-virulent microorganisms. This positive control involves adding "nothing" to both the heat-killed virulent bacteria before mixing them with the non-virulent bacteria.

If new genetic variation in the experimental populations arose solely by spontaneous mutations, then the most effective process for subsequently increasing the prevalence of the beneficial mutations in the population over the course of generations is

Answers

Answer:

binary fission

Explanation:

Binary fission is the main type of reproduction of prokaryotic organisms. In binary fission, the prokaryotic cell first duplicates its DNA and then divides into two cells, each one receiving one complete DNA molecule. Since binary fission is a type of asexual reproduction, this process increases the prevalence of beneficial mutations in a bacterial population. Moreover, transduction refers to the process by which a virus transfers genetic information from one bacterium to another bacterium. Conjugation is also a sexual mode of transfer of DNA from a donor (F+) to a recipient (F−) bacterial cell by direct cell-to-cell contact. Finally, transformation refers to the transfer of genetic material by which bacteria take up exogenous DNA from the environment and integrate it in their genomes.

Why making anti-viral medicines is harder than making anti-bacterial medicines ?

Also Is Virus a living parasites?​

Answers

Answer:

Making anti-viral drugs is more difficult than making anti-bacterial medicines because viruses have very few biochemical mechanisms of their own. They make use of host machinery which replicates. So it is very much difficult to find the targets where these drugs get interfered by not making any harm to the host. Thus, it is not easy to design an antiviral drug with high safety and effectiveness.

Explanation:

And i would say virus is a parasites but not a living parasite according to md

Answer:

Because antivirals can damage host cells where the viruses reside.

I hope this helps

all viruses are obligate parasites,that is they lack metabolic machinery of their own to generate energy or to synthesize proteins,so they depend on host cells to carry out these vital functions...

On your first research mission you make an amazing discovery by finding a new species living in the hostile environment of the Sahara desert. After observing it carefully you determine that it is not an autotroph, it is multicellular, and it does not contain any chitin. What is the best classification for it

Answers

Answer:

Animalia

Explanation:

A multicellular organism is an organism composed of two or more cells. Multicellular organisms include animals (i.e., organisms from kingdom Animalia), plants, and most fungi. Moreover, an autotroph is a living organism that can produce its own food by using materials from inorganic sources (e.g., water, carbon dioxide, etc); whereas a heterotroph is an organism that cannot produce its own food and thereby needs to eat other organisms, like plants or animals, to survive. Multicellular autotrophs are typically plants; whereas multicellular heterotrophs include all animals, fungi and some parasitic plants. Finally, chitin is a polysaccharide (polymer) of N-acetylglucosamine, which is found in the cell wall of fungi, as well as in the exoskeleton of some animal groups such as, for example, insects, crustaceans, etc.

What is one of the causes of mechanical weathering?

A. acid rain
B. oxidation
C. animal actions
D. carbon dioxide

Answers

C. animal actions

Others are chemical examples.

i think your answer might be animal actions

Khi nói về các hoocmôn tuyến tụy, phát biểu nào sau đây sai?

Answers

Explanation:

The exocrine component of the pancreas is the pancreatic islets. The endocrine cell of the pancreas produces hormone insulin. The major hormones released by the endocrine gland inside the pancreatic are glucose and glucagon, which control blood glucose levels, and cortisol, which inhibits insulin and glucagon production.

Heather is doing an acid-base reaction. She has 25.00 mL of hydrochloric acid of unknown concentration in a flask. She wants to add a basic solution to the acid drop by drop, until all the acid has reacted.

Answers

Answer:

lwlwlelpepwpspsppa

Explanation:

ookeieorooroekrkrkrklrkdkdodkekiekeieie

Does anyone know the answer for 1?

Answers

The correct answer of question number 1 is D. Sill

how does baby get its shape in the womb of an woman?​

Answers

Answer:

Uterus (also called the womb): The uterus is a hollow, pear-shaped organ located in a woman's lower abdomen, between the bladder and the rectum, that sheds its lining each month during menstruation. When a fertilized egg (ovum) becomes implanted in the uterus, the baby develops there.

what is the main reason for using a data table to collect data?​

Answers

Answer:

the correct awnser is a to understand better

Answer:

the correct answer is a because tables make data easier to understand

Plants and algae most recently shared a common ancestor 480 million years ago, and plants colonized land shortly after that. Light, water, minerals, and dissolved gases surround the whole body of a submerged green alga, and the buoyancy of water provides physical support. What part did plants evolve to absorb water and minerals on dry land

Answers

Answer:

vascular tissues

What is the correct structure of ATP? A. Ribose sugar, Adenine base, 3 Phosphate groups B. Triglyceride head, Ribose sugar, 3 fatty acids C. Ribose sugar, Phosphate group, Nitrogen Base D. Deoxy Ribsose sugar, Adenine base, 3 Phosphate groups

Answers

Answer:

The correct structure of ATP is

A. Ribose sugar, Adenine base, 3 Phosphate groups

Explanation:

The structure of ATP is a nucleotide, consisting of a nitrogenous base (adenine), a ribose sugar, and 3 serially bonded phosphate groups.

Based on his experiments, Mendel concluded that each trait was controlled by two _____.

Answers

Mendel stated that each individual has two alleles for each trait.

Which of these does not affect an individual’s metabolic rate?

A-their height

B-The genes they inherited

C-The muscle to fat ratio

D-The amount of exercise They do

Answers

none of these. all affect metabolic rate.

Which cells contain chloroplasts?

Answers

Specialised parenchyma cells known as chlorenchyma found in plant leaves contain chloroplasts.

This allows them to perform a photosynthetic function and responsible for storage of starch.

So, the correct answer is ' ChIorenchyma ' and parenchyma.'

Can someone help me answer these questions!?

6. The first tree used to divide the dinosaur into two separate groups are the structure of their hips. What are the two groups and what do the group names mean?

Answers

The two groups are Tyrannosaurus Ornithomimus and Tyrannosaurus Coelophysis which are different from one another in shape and body structure.

The word Ornithomimus means ''bird mimic,” because it resembles the bird i.e. they are toothless and had beaklike jaws while on the other hand,  Coelophysis means 'hollow form' and the specie has hollow limb bones that makes Coelophysis is a lightly body dinosaur that make it a fast hunter.

https://brainly.com/question/24373044

Que es nada
Respondan cualquier cosa

Answers

Can you please say the question in English I don’t know this language

Individuals with a mutation in the gene for apolipoprotein B-100 produce very low levels of this protein, which is a component of LDL. How would accumulation of fat in the liver be affected and would this result in hypercholesterolemia or hypercholesterolemia

Answers

Answer:

Fats would accumulate in the liver and the individual would show hypocholesterolemia

Explanation:

Familial hypercholesterolemia is a genetic disorder caused by a reduction and/or defect in the low-density lipoprotein (LDL) receptor. Moreover, apolipoprotein B is the unique protein component of LDL, which plays a critical role in lipid metabolism by binding the LDL receptor. Familial defective apolipoprotein B-100 refers to an inherited disorder associated with mutations of the apolipoprotein B-100 that leads to moderate or severe cases of hypercholesterolemia. Mutations in apolipoprotein B-100 are associated with a reduction in the binding capacity of LDL to the LDL receptor, thereby leading to hypercholesterolemia.

Why is the unit of velocity called derived unit?​

Answers

Answer:

Because it is a vector quantity, it has a direction too such that derived unit is made up of two or more fundamental units. That is mere and second. That is why it is called as a derived unit as its unit is metres per second.

Hope this helps...Have a good day!!

what traits could a plant that it would help it grow better in space

Answers

LED lights shine above to give the plants the energy they need to grow, and expandable plastic walls provide protection for the leaves as they get taller. So far, astronauts have just grown red romaine lettuce

Answer:

LED lights shine above to give the plants the energy they need to grow, and expandable plastic walls provide protection for the leaves as they get taller. So far, astronauts have just grown red romaine lettuce, but in the future, they will grow cabbage and tomatoes with seeds from the next SpaceX delivery.

Explanation:

Please Mark me brainliest

PLEASE HELP NEEDEDASAP

Answers

Answer:

My best guess would be the first option.

Explanation:

For example, when people began chopping down trees and making settlements in South America, fire ants started to move north in search for new homes. Eventually, they've became a huge problem to North America due to North America having no natural predators capable of eating these violent ants.

Answer:

Por ejemplo, cuando la gente comenzó a talar árboles y hacer asentamientos en América del Sur, las hormigas rojas comenzaron a moverse hacia el norte en busca de nuevos hogares. Con el tiempo, se han convertido en un gran problema para América del Norte debido a que América del Norte no tiene depredadores naturales capaces de comerse estas violentas hormigas.

GRACIAS

 

0

Explanation:

write the names of hybrid layer variety of hen.

please answer the correct one.

I will mark as brain list​

Answers

Answer:

These are some popular Hybrid Layers:

Bovans Goldline.

Copper Black (French Copper Marans / Rhode Island Red)

Black Tail, Gingernut Ranger (Rhode Island Red / Light Sussex)

Blue (Andalusian / Barred Plymouth Rock)

Amber (Rhode Island White / Rhode Island Red)

Warren, Marans Cuivre (Rhode Island Red / Marans cross)

Differentiate between communicable and non-communicable diseases. Give one example of each​

Answers

Answer:

hope this helps helps you a lot

my handwriting is bad sorry for that bhai

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