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3 years ago

Describe how humans benefit from photosynthesis

Biology

2 answers:

slamgirl [31]3 years ago

4 0

Answer:

Equally importantly, photosynthesis is the source of oxygen and also removes carbon dioxide from our atmosphere. Oxygen is required for cellular respiration, the process by which food is broken down into energy. Thus, human beings are also solely dependent on photosynthetic plants for their oxygen requirements.

Explanation:

gulaghasi [49]3 years ago

3 0

Answer:

The energy we get from the food we eat originally came from plants, which absorbed energy from the sun. Photosynthesis is also important because of the oxygen it produces. They recycle the carbon dioxide we breathe out and turn it back into oxygen so that we never run out.

Explanation:

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1. What animals do you think<br> Darwin was describing in his<br> entry?

AveGali [126]

Is there a picture to go with this?

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3 years ago

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What is the type of inheritance shown in the following pedigree? Blue represents no disease symptoms, pink represents having dis

klasskru [66]

Answer:

Explanation:

If the disorder is recessive, neither parent has to have the disorder because

they can be heterozygous. The characteristic features of autosomal recessive inheritance is as follows:-

•Appears in both sexes with equal frequency

• Trait tend to skip generations

• Affected offspring are usually born to unaffected parents

• When both parents are heterozygous approx. 1/4 of the progeny will be affected

• Appears more frequently among the children of consanguineous marriages.

The given pedigree follows these features. So the correct option is 'Autosomal recessive trait'.

Please correct me If I am wrong :)

7 0

3 years ago

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Predict phenotypes associated with nondisjunction of sex chromosomes.

Mnenie [13.5K]

Answer: The new daughter cells will have an abnormal amount of genetic material. That is called aneuploidy and it is the presence of an abnormal number of chromosomes. Different clinical conditions are the result of this nondisjunction.

Explanation:

Normal cells are diploids, that means they have two copies of each gene, one of each chromosome. So normal cells have two homologous chromosomes, one from each parent.

During anaphase of cell division, each pair of chromosomes is separated by the mitotic spindle. The separated chromosomes are then pulled by the spindle to opposite poles of the cell, and eventually will end up in the new daughter cells.

Nondisjunction is the failure of homologous chromosomes to separate properly during cell division, so it is the miss segregation of them. The new daughter cells will have an abnormal amount of genetic material. <u>Different clinical conditions are the result of this nondisjunction.</u>

Sex chromosomes participates in sex determination of an individual. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY) So nondisjunction of sex chromosomes could be:

XX: one cell with no chromosome and the other cell with two X chromosomes.
XY: one cell with no chromosomes and the other cell with XY chromosomes.

According to which gametes are fused during fertilization, different phenotypes can be given. For example, if a gamete with one chromosome fuses with another gamete with two chromosomes, the result will be an individual with three chromosomes (it could be XXY, or XXX) called trisomy.

Triple X syndrome is characterized by an extra X chromosome in females. Those affected are often taller than average, but most females have a normal sexual development. Klinefelter syndrome is known XXY individuals, and it causes infertility in males, breast growth, less body hair and weaker muscles.

And if a gamete with no chromosome fuses also with another gamete with no chromosome, the result is a nullisomy. But due to the lack of genetic material, the nullisomic gametes are rendered unviable for fertilization.

And if a gamete with no chromosome fuses with another gamete with one chromosome (normal) the result is a monosomy, the presence of only one chromosome from a pair. The result can be an individual who is X or Y. People with Turner syndrome have one X chromosome and it is the only monosomy that is seen in humans because other cases monosomy are lethal.

Any of those examples is called aneuploidy and it is the presence of an abnormal number of chromosomes.

3 0

2 years ago

4After completing their study of the carbon cycle, three students wrote statements making claims related to this topic. Read eac

mario62 [17]

Answer:

Incorrects:

Claim 1: When forests are cleared, we take away an opportunity to remove carbon from the atmosphere.

Claim 2: Carbon moves through biological systems and returns to the atmosphere through photosynthesis.

Claim 3: The amount of carbon involved in rapid cycling is much less than 1 percent of the total amount of carbon on Earth.

Explanation:

The carbon contained in forest products makes a small and manageable contribution to the global carbon balance. Globally, the net effect on atmospheric concentration is negligible, unless the rate of decomposition in geographically displaced product stocks is different from that in the forest ecosystem from which it was removed. However, controlling these rates through proper management can lead to some degree of mitigation of increases in atmospheric CO2.
During the carbon cycle, animals and plants release carbon dioxide into the atmosphere through cellular respiration, and plants capture carbon dioxide through photosynthesis.
The amount of carbon involved in rapid cycling it is the largest since it includes the carbon exchange between living beings, and is intertwined with the carbon cycle through long-term geological processes

8 0

3 years ago

if a flower were orange would it more likely be pollinated by insects or by the wind give at least one reason for your answer

yan [13]

It would more likely to be pollinated by insects.

This is because the bright color of the petals can attract insects towards the flower thus sticking some pollen grains and transfer them to the stigma (female part of flower).

On the other hand, the color of petals do not really have effect on the wind pollination. Therefore this explains why wind pollinated flowers usually have small or dull colored petals.

4 0

3 years ago