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Dvinal [7]
3 years ago
6

The umbilical cord connects the embryo to the

Biology
2 answers:
grin007 [14]3 years ago
3 0
B.fetus hope i could help


Elenna [48]3 years ago
3 0
The answer is C. Placenta.
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Living cells cannot use heat to provide the activation energy for biochemical reactions because ________. Which choice(s) comple
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Considering the following;

I. Heat is not readily available to all living cells.

II. Heat at excessive amounts denatures proteins.

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IV. When a critical temperature is reached, proteins no longer function

Answer;

I and IV

Explanation;

Living cells cannot use heat to provide the activation energy for biochemical reactions because heat is not readily available to all living cells and also when a critical temperature is reached, proteins no longer function.

Too much heat can kill an organism by rendering its organelles, cells, tissues and organs permanently inoperable and un-salvageable. The same process can be observed in tissues at low temperatures, and is the cause of frostbite. This is because enzymes are denatured by high temperature and inactivated by low.

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3 years ago
What are pteridophytes?​
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Answer:

A pteridophyte is a vascular plant that disperses spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. Ferns, horsetails, and lycophytes are all pteridophytes.

Explanation:

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3 years ago
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Directions: Select each correct answer. More than one answer may be correct. It has been theorized that all of the modern contin
Firdavs [7]

the answer to this question is all of these (a,b,c)

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4 years ago
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What best explains why there's fewer secondary consumers than producers?
monitta

Answer:

because of inefficiency

Explanation:

The organisms that eat the primary consumers are meat eaters (carnivores) and are called the secondary consumers. ... Because of this inefficiency, there is only enough food for a few top level consumers, but there is lots of food for herbivores lower down on the food chain. There are fewer consumers than producers.

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last answer. Breaks down sugar before respiration can begin. Glycolysis breaks down glucose. glucose=sugar

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