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Advocard [28]
3 years ago
7

Who was the first person to see cells?

Biology
1 answer:
Stella [2.4K]3 years ago
6 0
<span>Robert Hooke was the first person to see cells.</span>
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What is a complete protein?
masya89 [10]

If you’re a big fan of quinoa, or chia seeds, you may have heard them touted as complete proteins. In a nutshell, that means they contain all of the nine essential amino acids required to build and repair protein tissues in the body. But the question is: does that matter?

The short answer is no, not really. But first, let's back up a step.

Animal-based foods like eggs, dairy, fish, and meat are complete proteins; while most plant foods are incomplete—meaning certain amino acids are missing from the protein puzzle.

Some people believe that in order to utilize plant protein efficiently, you must eat so-called "complementary proteins" together. Rice and beans are a good example of complementary proteins, because the amino acids that are missing from beans are found in rice and vice versa.

plz mark me as brainliest :)

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3 years ago
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What kind of doctor is neil shubin
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Neil Shubin is a paleontologist  and evolutionary biologist.
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Discussion
Viefleur [7K]

Answer:

The answer to these questions are the following:

1. sucrose solution (higher concentration of water molecules in the onion cells) >> red onion cells will shrink >> smaller diameter

2. distilled water (higher concentration of water molecules in the surrounding solution) >> red onion cells will become turgid >> higher diameter

Osmosis refers to the movement of a solvent (usually water molecules) across semipermeable biological membranes, which occurs from a region of higher concentration to a region of lower concentration. There are three classes of solutions that have different effects on cells due to the process of osmosis:

1. In a hypotonic solution, the cells will become turgid  

2. In an isotonic solution, the cells will become flaccid.  

3. In a hypertonic solution, the cells will shrink (plasmolysis)

When plant cells are placed into a hypertonic solution where there is a greater concentration of solute outside the cells (as in this case sucrose solution), water molecules will move from inside the cells to outside the cells, thereby cells will shrink due to water loss

When plant cells are placed into a hypotonic solution that is diluted in comparison to the content of the cell (as in this case plant cells placed in distilled water) water molecules will move from outside the cells to inside the cells, thereby cells will become turgid.

Learn more about this topic here:

brainly.com/question/11789335?referrer=searchResults

brainly.com/question/11269438?referrer=searchResults

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3 years ago
According to the system of biological classification, human beings, cats and elephants are placed in the same ?
nasty-shy [4]
Class, As the classification system goes phylum (eg. chordata), class (eg. mammalia), order (eg. carnivora), family (eg. felidae), genus (eg. panthera), species (eg. leo) and all the following are in the same class- mammalia 
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3 years ago
At the end of meiosis 1:
sergey [27]
The answer is E
Explanation:
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