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Sunny_sXe [5.5K]
3 years ago
6

Help me with these please

Biology
1 answer:
jeka943 years ago
5 0
3. is it would spin so fast around the earth that it would make 1 full rotation suck the Earth in.
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Which of these is an advantage of using models to study tectonic plate movements?
wariber [46]

The correct answer is option Observations can be made from outside the "system".

The study of the plate tectonics allows the observation of the movement of the plate tectonics. These observation can be study to determine the pattern of the movement from outside the plate tectonics system and the event occurring due to plate tectonics can be predicted.

5 0
3 years ago
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What do you think will happen to the ph and pco2 levels with hyperventilation?
umka2103 [35]

It will increase blood pH. This is because pCO2 also reduces. pCO2 is critical in the <span>maintenance of blood pH. Dissolved CO2 from respiring tissues dissolves in blood to form carbonic acid. The carbonic acid partially dissociated into H+ ions and its conjugate base (bicarbonate ions). Carbonic anhydrase catalyzes the formation of carbonic acid (in tissues) and vice versa (in the lungs). In the lungs, the carbon dioxide is expelled.  </span> 






7 0
4 years ago
Cytosine makes up 24% of the nucleotides in a sample of DNA from an organism.
Alchen [17]

Answer:

26%

Explanation:

if cytosine makes up 24%, then guanine also makes up 24%.

add these to get 48%.

subtract that from 100% to get a remaining 52%

then split the 52% between adenine and thymine to tell you that 26% is thymine

7 0
3 years ago
Meiosis reduces chromosome number and rearranges genetic information. Explain how the reduction and rearrangement are accomplish
Alisiya [41]

Answer:

Explanation:

Meiosis is a form of cell division that occurs in the sex cells of organisms. It ensures the reduction of a diploid cell to an haploid cell to allow for the formation of a diploid zygote after fertilization (contribution of both parents haploid sex cells to give a diploid zygote). Thus, this process is very essential and important.

The reduction is accomplished by 2 divisions after the duplication of chromosomes

- first division: separation of homologous pairs of chromosomes (this reduces the total in half)

- second division: separation of sister chromatids of a chromosome.

The rearrangement in meiosis occurs by crossing over/genetic recombination.

This is the exchange of genetic material between homologous pairs of chromosome bringing about a rearrangement and genetic variation

An example of a chromosomal abnormality that arises as a result of defects in this process is the Down Syndrome which is caused by a nondisjunction of the chromosomes 21 pair in a sex cell.

This condition produces offsprings that have some characteristic facial features, short stature etc

6 0
3 years ago
Which conservation effort helps to conserve trees?
garri49 [273]
I'd think it's probably the recycling of newspapers, as trees are making of paper can be a reason for deforestation. With recycling of newspapers, fewer trees need to be cut down.
8 0
3 years ago
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