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3 years ago

Summarize how energy flows from sunlight to atp and how matter cycles between photosynthesis and cell respiration.

1 answer:

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During the process of photosynthesis, the plant use energy from the sun to synthesize nutrients from water and carbon dioxide. Thus, the process of energy transformation occurred when light from the sun is converted into chemical form of energy known as nicotinamide adenine dinucleotide phosphate (NADPH). In plant cell, ATP and NADPH is used to assemble carbon dioxide molecules and other carbon chain into glucose which then linked together to form cellulose used by the plant to grow new stems and leaves. However, cellular respiration is the process where the body converts the energy stored in food into form of energy that body can use.

In conclusion, during the process of photosynthesis, carbon dioxide is pulled out from the atmosphere while carbon dioxide is released into the environment during the process of cellular respiration.

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Describe the four structural roles of the skeletal system.<br> The Human SKELETAL SYSTEM

makkiz [27]

Answer:

1. Support

2. Protection

3. Movement

4. Supply & Storage

Explanation:

1. Support : It provides a framework to support the organs and tissues of the body.

2. Protection: It protects our internal organs. The skull protects the brain; the thorax (sternum, ribs and spine) protects the heart, lungs and other viscera (organs within the thorax).

3. Movement: It provides a framework for muscles to attach. Then when the muscles contract they pull on the bones of the skeleton, which act like levers to create movement.

4. Supply & Storage: The bones that make up the skeleton are a source of both red blood cells (which transport oxygen) and white blood cells (which fight infection), which are formed within the bone marrow.

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3 years ago

Read 2 more answers

Based on fossilized evidence, there are scientific claims made about the evolution of certain species. If a scientist studying t

Eva8 [605]

Answer: For the scientist to have alternative hypothesis considered, it is imperative he takes certain steps, this steps will ascertain the scientific claims already made about the evolution of species.

Therefore,the scientist will simply test the alternative hypotheses inorder to know that they are incorrect.

This testing of hypotheses to ascertain their incorrectness is very useful in the study of fossils.

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3 years ago

What two gasses probably dominated Precambrian Earth's atmosphere

masha68 [24]

Nitrogen and Oxygen

4 0

3 years ago

To be meaningful, a measurement should have

MAXImum [283]

The answer is c) a number and a unit

8 0

3 years ago

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Complete each statement.

beks73 [17]

7. Adenine (A), Guanine, Cytosine and Thymine are the four nitrogenous bases in DNA.

8. In DNA Cytosine always forms hydrogen bonds with guanine.

9. The sequence of nucleotides carries the genetic information of an organism.

10. The process of replication produces a new copy of an organism's genetic information which is passed on to a new cell.

11. The double-coiled shape of DNA is called a double helix

Explanation:

There are four nitrogenous bases in the DNA of an organism. Two of the bases are pyrimidines eg: Thymine and cytosine while 2 of the bases are purine bases namely adenine and guanine. The purine of one strand forms a hydrogen bond with pyrimidine of the parallel strand of DNA.

The bases are present in nucleoplasm as dNMPs and in DNA they are present as dNTPs (deoxyribonucleotide triphosphate). During replication, these dNMPS keeps on bonding with other dNMPs in the presence of ATP and as DNA Polymerase, ligase topoisomerase etc. These nucleotides form the DNA strands and they are responsible for coding proteins. The sequence of DNA is also termed as gene.

The double helix structure of DNA was given by Watson and Crick. Each strand has an alternative backbone of sugar and phosphate group. The four bases bonds with glycosidic and phosphodiester bonds with sugar and phosphoric acid.

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3 years ago