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Ostrovityanka [42]
3 years ago
10

Hair is made from a

Biology
1 answer:
fomenos3 years ago
8 0

Answer:

The answer is d

Explanation:

keratin is a protein molecule that is found in hair follicles fingernails and in some skin cells.

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Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic? (2 points)
Elan Coil [88]

Photosynthesis is an example of a chemical reaction <u>because it is a process in which carbon dioxide and water are combined to form glucose and oxygen.</u> It is an endothermic reaction because <u>it requires solar energy. </u>

<u> </u>

Further explanation:

Photosynthesis is the process by which green plants and some organisms convert solar energy into chemical energy. This <u>process takes place in the chloroplast</u> of the cell. Chlorophyll is the green pigment found in the chloroplast that helps in the absorption of sunlight. The plants use this <u>light energy to transformed carbon dioxide and water into glucose and oxygen.</u> This process is known as an endothermic chemical reaction.

The tiny pores present on the surface of green leaves help in the exchange of gaseous such as carbon dioxide enters the plant for the process and oxygen is removed from the plant after the process is completed. These tiny pores are called stomata. Glucose is the end product of photosynthesis which is utilized by the plant as a source of energy. It helps in the growth and development of the plant. The remaining sugar molecules are combined to form a complex substance called carbohydrate.

<u>The complete process occurs in two steps: light-dependent reaction and light-independent reaction</u>. The light-dependent reaction occurs in the thylakoid membrane in the presence of solar energy. The light-independent occurs in the absence of solar light or usually in the dark. It occurs in the stroma of the cell. It is a carbon fixing reaction in which sugar molecule is produced.

Learn More:

1. Learn more about meiosis <u>brainly.com/question/1600165 </u>

2. Learn more about the process of molecular diffusion in a cell <u>brainly.com/question/1600165 </u>

3. Learn more about human sperm and egg cell <u>brainly.com/question/1626319 </u>

<u> </u>

Answer Details:

Grade: High School

Subjects: Biology

Topic: Photosynthesis

Keywords:

Photosynthesis, endothermic, organism, chemical, chloroplast, absorption, carbon dioxide, stomata, glucose, carbohydrate, thylakoid, stroma.

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4 years ago
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3 years ago
1. What has to be added to a substance to cause a phase change?
CaHeK987 [17]

Answer:

To cause a phase change, you either add heat energy to a substance to cause it to evaporate, melt, or sublimate, or you subtract heat energy, or take it away, to make the substance freeze or condense. Hope it helps!

Explanation:

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Evidence of evolution 1. make drawings to explain the difference between homologous and analogous structures. 2. define vestigia
Shtirlitz [24]
Ok this is going to make me work sadly with a time restraints that I have I will be unable to draws the first picture however the rest I can do. 2. vestigial structures are generally parts of an animal's body that is unnecessary and no longer used. specifically whales have vestigial pelvis bones and as you know they dont walk as for my body the appendix is also a good example it kinda just sits there waiting to become infected. 3. embryos from separate organisms in very early stages look VERY alike and can be incredibly difficult to tell them apart from one another. 4. Everyone's favorite dioxy ribonucleic acid or DNA can show ancestry they do this by being similar like my DNA isnt exactly the same as my mothers however there are more then enough similarities in our DNA to tell that we are related. This works for any and all animals as long as they have salvageable DNA so dinosaurs dont count. using DNA we can also tell that I'm more closely related to a dolphin than a shark and I'm more closely related to sharks than sponges. hope I answered what you were looking for thoroughly
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3 years ago
The following describes a lab on natural selection.
marishachu [46]
The spoon is best use for consuming macaroni over toothpicks, The scissors are better at collecting than consuming, The plastic cup represents the stomach of the bird
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