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aniked [119]
3 years ago
11

What is an index fossil?

Biology
2 answers:
QveST [7]3 years ago
6 0
Used to define and identify geological times.<span />
dimulka [17.4K]3 years ago
3 0

Answer:

A fossil found in rocks from one time period

Explanation:

An index fossil is an fossil of an organism which lived at only one time during the evolutionary history. The index fossils are useful since they are only obtained from rock of one particular evolutionary time zone.  Restricted presence of index fossils represents the fact that they lived during a relatively brief period of geologic history. These fossils are used for dating and correlating the various time zones of evolutionary history

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What is the primary product of light independent reactions
SOVA2 [1]

The primary products of the light independent reactions  (after one turn of the cycle) are:

a)  two G3P molecules

b)  three ADP

c) two NADP+

However ADP and NADP+ are not really "products". They are regenerated and later used again in the Light-dependent reactions.  Each G3P molecule is composed of three carbons.

For the Calvin cycle (Light independent cycle) to continue, 5 out of  the 6 carbons provided by the two G3P molecules are used to regenerate ribulose 1, 5 phosphate. Therefore there  remains only one carbon for the next turn of the cycle.

One  molecule of glucose requires 6 turns of the cycle. Any extra G3P is used to make starch, sucrose and cellulose.



7 0
3 years ago
In the previous question a female dragon homozygous for tail spike mated with a male that was homozygous for no tail spike. what
OlgaM077 [116]
I believe the answer would be “B” Srry not good with science
6 0
3 years ago
Which element is essential to making up all organic molecules?.
goldenfox [79]

Answer:

This element is carbon.

Explanation:

You might be quick to think the answer is something like hydrogen and oxygen because both form to make water. But understand that the question is not asking about important elements in life, just which element makes up organic molecules. This element happens to be carbon.

It's important to understand that carbon is lucky in that it has 4 valence electrons and is able to bond with other important elements, like F, N, and especially H. The bond between C-H is essential in organic chemistry because it represents the structure of an organic molecule and helps with the IUPAC naming of organic molecules. It also suffices to say that there is a cycle for carbon in the carbon cycle, which transports carbon from one place in our world to the other.

So, it suffices to say that carbon is in fact essential for making up organic molecules.

5 0
2 years ago
One cup of vanilla milkshake provides 254 cal and 332 mg calcium; one cup of nonfat milk has 86 cal and 301 mg calcium. Choosing
kow [346]
<h2>Nutrient density</h2>

Explanation:

  • Nutrition is molecules in food that all living beings need to cause vitality, to develop, create, and recreate. Supplements are processed and afterward separated into fundamental parts to be utilized by the creature. There are two fundamental kinds of supplements, macronutrients, and micronutrients. The three fundamental classes of macronutrients incorporate sugar, protein, and fat. The two kinds of micronutrients are nutrients and minerals, and these are additional particles that cells need to make vitality.
  • "Nutrient density" signifies the amount you get of a certain something, given the nearness of something different. On account of nutrient density, the "things" you get, the supplements, are dissected in relationship to the amount they "cost" you, regarding calories. Essentially expressed, nutrient density implies what number of supplements you get from nourishment, given the quantity of calories it contains. nutrient density is a simple method to associate supplements with calories. No nourishments are more supplement thick than entire, naturally developed food sources.

5 0
3 years ago
.
bonufazy [111]

Answer:

The link reaction occurs after glycolysis and before the Krebs cycle. It begins with pyruvate, which loses a carbon as carbon dioxide is formed - leaving a 2-carbon molecule. The link reaction terminates with the production of acetyl coenzyme A.

Explanation:

so ya coenzyme A.

8 0
3 years ago
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