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Dmitriy789 [7]
2 years ago
12

Why do sexually reproducing organisms need gametes? Why don’t asexually reproducing organisms need them?

Biology
1 answer:
Nana76 [90]2 years ago
5 0
Gametes are reproductive cells that unite during sexual reproduction to form a new cell called a zygote. Sexual reproduction needs zygotes to reproduce that is why gametes are needed. Asexual reproduction doesn’t need gametes because there is only one parent and there is no fusion of gametes.
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Transport of a substance from the lumen (cavity) of an organ into one side of a cell and out the other side of the cell into the
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Transport of a substance from the lumen (cavity) of an organ into one side of a cell and out the other side of the cell into the extracellular fluid is called <u>transcellular transport</u>.

The two routes of transport of substances across the epithelium of the gut are by transcellular method and paracellular method.

Transcellular transport refers to the transport of solutes across a epithelial cell layer through the cells.  The best example is the movement of glucose from the intestinal lumen to the extracellular fluid by the epithelial cells. The epithelial cells use the active transport to generate the transcellular transport. Active transport refers to the transport of substances from a region of its lower concentration to a region of its higher concentration against the concentration gradient using cellular energy.

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3 years ago
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Which one of the following statements presents a condition of the Hardy-Weinberg principle? A. Gene flow is present. B. Genetic
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The statement in the given question that presents a condition of the Hardy-Weinberg principle is that random mating occurs. The correct option among all the options given in the question is option "C". There are definitely certain conditions under which the Hardy- Weinberg principle occurs and they are when there is no gene flow, no mutations happen, no generic drift occurs and random mating occurs. This principle also states a very important aspect and it is that genotype and allele frequencies will always remain constant from one generation to another if there is absence of other evolutionary inflrnce.


3 0
3 years ago
How heat energy from the sun powers the water cycle?
Karolina [17]

Answer:

Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds.

Explanation:

4 0
2 years ago
Roles of gases between photosynthesis and cellular respiration?
Basile [38]

Answer:

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Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water. While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. It is the released oxygen that is used by us and most other organisms for cellular respiration. We breathe in that oxygen, which is carried through our blood to all our cells. In our cells, oxygen allows cellular respiration to proceed. Cellular respiration works best in the presence of oxygen. Without oxygen, much less ATP would be produced.

Cellular respiration and photosynthesis are important parts of the carbon cycle. The carbon cycle is the pathways through which carbon is recycled in the biosphere. While cellular respiration releases carbon dioxide into the environment, photosynthesis pulls carbon dioxide out of the atmosphere. The exchange of carbon dioxide and oxygen during photosynthesis and cellular respiration worldwide helps to keep atmospheric oxygen and carbon dioxide at stable levels.

Explanation:

6 0
3 years ago
Briefly explain the relationship between cells, organs and tissues
Mazyrski [523]

Answer/Explanation:

Cells of a similar type are organized together to make tissues. Different types of tisues come together to perform a similar function as part of organs.

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