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3 years ago

SOMEONE HELP ASAP!! 20 POINTS!!

Biology

2 answers:

grin007 [14]3 years ago

8 0

The C horizon is the answer.

lorasvet [3.4K]3 years ago

3 0

The C horizon because it lays on the bedrock of the earths crust.

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1. Lipids, carbohydrates, and DNA all exist in human cells as long molecular chains. Which of the following describes how DNA di

Nutka1998 [239]

Answer:

1. D. Only DNA contains genetic information

2. D. Nitrogen and Phosphorus

Explanation:

1. Lipids are insoluble in water unlike other molecules. It stores energy within the fat tissues and cushion internal organs against trauma.

Carbohydrates are sugar units such as monosaccharides, disaccharides molecules which makes up starch that is fuel to your cells.

DNA is a type of nucleic acid that contains genetic information which influences your personal characteristics.

2. The family Rhopalodiaceae has the ability to perform nitrogen fixation, which allows diatoms to fix atmospheric nitrogen. And phosphorus has been found in some diatom species in the Black sea region which does not affect its reproduction rate and also helps in carbon cycle.

5 0

3 years ago

Place the following in the correct order as they occur in CELL RESPIRATION.

Goryan [66]

Electrons and h+ ions pop off and are picked up by NADH.
1 C is stripped from 3-C PGA and makes Co2.
Coenzyme A attaches to 2-C molecule making Acetyl Co-A.
Resulting 3 C molecule is stabilized BEFORE entering the mitochondria.
Acetyl Co-A enters mitochondria and drops off 2-C molecules.
In cytosol, 6-C glucose and 2 ATP split into two 3-C molecules (glycolysis).
2-C molecule combines with 4-C molecule and breaks into two 3-C molecules
Krebs cycle spins twice; each time stripping 1 carbon to make Co2 as a by-product.
With each cycle of Krebs, electrons and H+ ions pop off, are picked up by NADH and FADH2 and taken to ETC
4 molecules of ATP are generated.

5 0

2 years ago

Consider the following three populations of birds. Assume HW equilibrium. With these birds red coloring is recessive, while brow

bixtya [17]

Answer:

Red allele frequency will be highest in population II

Population III can undergo bottleneck effect

The frequency of the brown allele will least likely be altered in the population I

Explanation:

Population I -

Total population - $670$

Brown birds - $603$

Red birds - $67$

Population II

Total population - $100$

Brown birds - $90$

Red birds - $10$

Population III

Total population - $30$

Brown birds - $27$

Red birds - $3$

Frequency of red birds in population I

$\frac{67}{670} = 0.1$

Frequency of red birds in population II

$\frac{10}{90} = 0.11$

Frequency of red birds in population III

$\frac{3}{30} = 0.1$

Red allele frequency will be highest in population II and it will be equal to $\sqrt{0.11} = 0.33$ as compared to $0.31$ in case of population I and III