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Lisa [10]
3 years ago
15

Please can anyone help me ill make you the brainiest, I need help with these questions!

Biology
1 answer:
labwork [276]3 years ago
4 0

Answer:

the moles of oxygen react only 1.05 moles

Explanation:

because the formula of methane is CH4 so it has 10 molecule so 10.5 ÷10 =1.05

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I'm doing a course on animal welfare and this is the question. How would you answer it?
Vlad [161]
I would choose the second option because animal are not objects that don’t feel anything they kinda like human(they have feelings).
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3 years ago
Explain the purpose of the placenta and describe how a fetus gets its nutrients.
marusya05 [52]

Answer:

The placenta is the temporary association of fetus and maternal tissue. It is meant for nutrition and transport of different substances.

Explanation:

The placenta is a temporary association of fetal and maternal tissues. The placenta is formed from the trophoblast of the blastula. These trophoblasts   form chorionic villi which later forms the placenta. The chorion and allantois also take part in the formation of the placenta. Hence, the human placenta is known as the chorioallantoic placenta. The process of formation of the placenta is known as placentation.  

The placenta has several functions but the major function is to provide nutrition to the fetus. The developing fetus gets nutrition from the mother's body by the placenta. The placenta provided with blood vessels which help in the transportation of different substances. It also helps in gas exchange between the mother and baby. Thus it plays a vital role in fetal respiration. The metabolic wastes diffuse through the placenta. Placenta also stores fat, glycogen, which participates in protein metabolism.

7 0
3 years ago
15. Proteins are super important because they contain
son4ous [18]

Answer:

Hair and nails are mostly made of protein. Your body uses protein to build and repair tissues. You also use protein to make enzymes, hormones, and other body chemicals. Protein is an important building block of bones, muscles, cartilage, skin, and blood.

Explanation:

5 0
3 years ago
Read 2 more answers
Which type of lens can be rotated to select different magnifications?
stich3 [128]

Answer:

objective lenses

Explanation:

objective lenses with different magnifications, screwed into a circular "nosepiece" which may be rotated to select the required lens.

4 0
3 years ago
What are two things that all non vascular plants share?
Zepler [3.9K]
<span>They do not have a phloem or xylem.</span>
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3 years ago
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