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juin [17]
3 years ago
6

____________ are cellular macromolecules containing hydrogen, oxygen, nitrogen, carbon and phosphorous.

Biology
2 answers:
dimulka [17.4K]3 years ago
3 0
B. Nucleic Acids
Only Nucleic Acids contain phosphorus
andreyandreev [35.5K]3 years ago
3 0

Answer:

The correct answer is option B, Nucleic acid.

Explanation:

A nucleic acid is made of chain of structural repeating units called nucleotide. Each nucleotide consists of  nitrogen atom attached to a pentose ( five carbon) sugar which is further attached to a phosphate group. A sugar is nothing but a macro molecule that is made up of carbohydrates consisting of carbon, hydrogen and oxygen.  

Thus, it can be said that a nucleic acid is made up of  

a) Carbon,  

b) Nitrogen,  

c) Hydrogen  

d) Oxygen and

e) Phosphorus

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How do hormones relate to the estrous cycle?
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Estrous cycles give females repeated opportunities to become pregnant throughout their productive lifetime. The cycle is regulated by the hypothalamic-pituitary-gonadal axis, which produces hormones that dictate reproductive events.

Explanation:

5 0
3 years ago
Ben and Sam were conducting experiments on physical and chemical changes in science class. First they added some salt to water a
8090 [49]

Answer:

Sam is correct. It is a chemical change and the contents should be in D. for compound.

Explanation:

This answer is correct because I just took the USA test prep

Good Luck!

6 0
3 years ago
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Nitrogen is a nutrient that organisms need to produce (12) . Plants and animals cannot use the nitrogen that makes up a large pe
Dmitriy789 [7]

Answer:

12. Protein 13. Atmosphere 14. Nitrogen fixation 15. Plants 16. Consumers 17. Urinate 18. Decay 19. Decomposers 20. Ammonia 21. Denitrification

Explanation:

<em>12. Protein</em>

Nitrogen is essential to organisms. It is the main constituent of amino acids, which is the building blocks of protein in organisms.

<em>13. Atmosphere</em>

Nitrogen occurs naturally as gas in the earth’s atmosphere, accounts for about 78% of gases found in the atmosphere. This gaseous Nitrogen which is inert cannot be accessed by plants and animals for use.

<em>14. Nitrogen fixation</em>

For plants to be able to use the gaseous Nitrogen in the atmosphere, Nitrogen fixation has to take place. It involves the turning of gaseous Nitrogen in the atmosphere into ammonia. Nitrogen atoms is combined with Hydrogen atoms by  enzyme called “nitrogenase”. This enzyme is present in nitrogen-fixing bacteria.  

<em>15. Plants </em>

Nitrogen enters the food web when plants assimilate nitrogen compounds from the soil to form nucleotides, amino acids, and other important chemicals in life.

<em>16. Consumers </em>

Consumers are mainly animals that feed on plants in an ecological food web in other to be able to use the amino and nucleic acids formed from Nitrogen as a major component. Consumers can be categorized as primary, secondary, and tertiary consumers.

<em>17. Urinate </em>

Nitrogen is very much concentrated in the urine of animals and also in their faeces. As animals urinate, Nitrogen is being returned to the soil.

<em>18. Decay </em>

Decay starts, as organisms die. The organisms start decomposing.

<em>19. Decomposers </em>

Decomposers are the bacteria in the soil that break down the nucleic and amino acids in dead organisms into nitrates and ammonia through a process called ammonification

<em>20. Ammonia </em>

This is the end result of the decomposition of dead organisms by decomposers

<em>21. Denitrification </em>

Compounds of nitrogen are turned back into gaseous nitrogen by anaerobic bacteria. This prevents

3 0
3 years ago
If photosynthesizing green algae are provided with CO2 containing heavy oxygen (18O), later analysis will show that all of the f
motikmotik

Answer:

The correct answer will be option-D

Explanation:

The process of photosynthesis release oxygen from the plant which is used by the organism on earth during cellular respiration.

The oxygen released by the plants is formed through the splitting of water molecules as a result of the transfer of electrons through the electron transport chain in the thylakoid membrane during the light-dependent reaction.

Since the released oxygen is the result of the light-dependent reaction and not the light-independent reaction or Calvin cycle where heavy oxygen isotope is utilized in the cycle.

Thus, option-D is the correct answer.

8 0
3 years ago
Malthus, an English economist, predicted world wide ___ in the 18oo's.
inna [77]
This question is faulty,  it could either be A - starvation or B - growth
He predicted that humanity would overpopulate (growth) and lead to food supply shortage (starvation) best of luck!
4 0
3 years ago
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