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Reil [10]
3 years ago
15

Natural systems (respiring animals, decomposition, fires, the ocean) contribute approximately 700 giga-tons of Carbon (GtC) to t

he atmosphere each year. About how much Carbon do human activities contribute to the atmosphere each year?
Biology
1 answer:
mina [271]3 years ago
7 0

Answer:

Around 25-30 gigatons.

Explanation:

Although natural processes do produce much more carbon dioxide than humans, its a delicate balance and all of that carbon dioxide is absorbed back. However, when humans arrived, they disrupted that balance, and even with the relatively small amount it is creating big problems.

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2. Tim and Stephanie are devastated when the
saul85 [17]

Answer:

Explanation:

<em>Tim and Stephanie are devastated when they find out their newborn son has hemophilia- sex-linked recessive disease. Tim is shocked because he doesn’t have hemophilia, and figured if his son has it he would have gotten it from him. Is Tim correct in his thinking? Explain. Also explain what their genotypes must be in order for neither parents to have the disease but their son does. Create a Punnett square, and indicate the mother's and father's genotype.</em>

<em />

First of all, the thinking of Tim is wrong. Hemophilia is X-linked and a male (XY) child always inherits his X chromosome from his mother. Hence, <u>the newborn son of Tim must have inherited the allele for the disease from Stephanie.</u>

Now, neither Tim nor Stephanie showed any symptom of hemophilia. It could only mean that Tim is totally free of the hemophilic allele while Stephanie is a carrier for it. Because a man has just one X chromosome, he can either be totally free of the abnormality or affected by it, no in-between. A woman has two X chromosomes, hence, she can be totally free, a carrier, or affected for the disease. Assuming the allele for hemophilia to be h, Tim's genotype would, therefore, be X^HY while that of his wife would be X^HX^h .

The Punnet's square analysis of the cross between Tim and Stephanie is indicated in the attached image.

3 0
3 years ago
What is one possible positive outcome of global warming?
Vladimir [108]

Well we’re all gonna die so like yay but in all seriousness it can have some short term positive effects like spring will come sooner so farmers can plant sooner. Long term the northwest passage with open so it with help with the shipping commerce
3 0
2 years ago
A model cell with damaged DNA was created to explain the importance of checkpoints in a cell cycle. The G2 checkpoint accidental
allsm [11]
E. The cell continued to divide uncontrollably to create more damaged cells.
7 0
3 years ago
Read 2 more answers
What is the gel-like fluid that fills the cell and surrounds the organelles?
GaryK [48]

Answer:

The cytoplasm.

Explanation:

This gel-like fluid helps the cell keep its shape and allows substances to move around the cell.

6 0
3 years ago
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Water and minerals are transported from the roots to the rest of the plant through the phloem. True or false?
Step2247 [10]
True hope it helps!!
7 0
2 years ago
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