BIOLOGY HIGH SCHOOL

(PLEASE HELP IT IS DUE TODAY)1. Which statement best describes stem cells?

A. Stem cells are commonly found in the brain of adults.

B. Stem cells are flowing through our veins delivering oxygen to the other cells of your
body.

C. Stem cells are only found in prokaryotes.

D. Stem cells are unspecialized cells that have the potential to differentiate into a wide
variety of cell types.

Answers

Answer 1
Answer:

Answer:

the answer to that one is D

Answer 2
Answer:

Answer:

It might be A

Explanation:

It might be A because stem cells are usually found in brain, blood, bone marrow, muscle, skin, heart, and liver tissues.

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Pollution stays in the area where it is produced.
a. True
b. False

Answers

False, because if it is air pollution, the polluted particles diffuse in the air and then travels. In addition, for noise pollution, sound waves travel!

What does stirring do in an experiment

Answers

It mixes all the chemicals in the expiment together. But it can also ruin an experiment depending on what type of experiment you are doing.

A student is given a small amount of unknown tan-colored liquid substance. This unknown liquid is placed into a glass of water and mixed. Despite mixing, the tan liquid remains separated from the water and collects as a large droplet at the top. Which of the macromolecule groups is this liquid MOST likely to be a member of?

Answers

This liquid substance most probably be a member of the group of lipids. Liquids which do not dissolve in water are called hydrophobic substances. Nonpolar substances exhibit this effect. Lipids are a class of large molecules or macromolecules which are hydrophobic. Lipids include cholesterol, fat, and phospholipids. 

Answer:

Lipids

Explanation:

Study Island said so

Which of the following statements is true?A.
Fossils are frequently found in metamorphic rock.

B.
Igneous rocks form from the cooling and crystallization of magma.

C.
Extrusive igneous rocks, found in the Earth's lithosphere, are not subject to weathering.

D.
Sedimentary rocks are formed as a direct result of chemical weathering.

Answers

The awnser is B my good sir

Hi There!

Question - Which of the following statements is true?

Answer - B. Igneous rocks form from the cooling and crystallization of magma.

Why - This is the only statements thats true, because igneous rocks are formed from the cooling of magma.

Hope This Helps :)

Which kind of organism is a autotroph

Answers

Answer:

Explanation:

{Auto-self, troph-food}

An autotroph is an organism that is able to produce its own food, which are usually complex organic substances from simple inorganic substances.

Unlike heterotrophs, they are not dependent on other organisms for their source of energy.

In the flow of energy in an ecosystem, they are commonly referred to as producers because other organisms, mostly animals are dependent on them for energy. This autotrophic ability is a characteristics of most plants, green algae and photosynthetic bacteria.

Autotrophs are in two category viz;

1. Photoautotrophs; which use light as a source of energy to power the synthesis of organic substances in a process called photosynthesis. These organisms possess pigments that makes them capable to capture the photons of light. Examples are green plants, green algae etc.

2. Chemoautotrophs, which use chemical inorganic compounds e.g Hydrogen sulfide, ammonia etc. as a source of energy to synthesize their food. Examples include archaebacteria
It is an organism that produces its own food and supplies energy to heterotroph

Describe an environmental factor that could influence natural selection and decrease genetic diversity?

Answers

definitely climate change 
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