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adell [148]
4 years ago
12

HURRY PLEASE!! Explain how the DNA molecule is stabilized but also able to be changed.

Biology
1 answer:
alexandr1967 [171]4 years ago
7 0
The nitrogenous bases placed in between the DNA double helix strands, like rungs on a ladder, are positioned there because of the hydrophobic effect and are stabilized by hydrogen bonding. The stability of DNA also relies on the interactions between the hydrogen bonds between bases, hydrogen bonds between bases and surrounding water, and base interaction between neighboring bases.

Hydrogen bonds are able to stabilize the DNA double helix by pairing up with their complementary base pairs (guanine with cytosine and adenine with thymine)

Hope this was able to help you! I went through my answer and bolded the more important parts, and parts more useful for answering the question.
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Please help me!! 15 points!!!!!
Karolina [17]

Image 1.1 -

Stomata are little moth-like structures in leaves, that, when open, allow the exchange of gases between the plant and the exterior.

Answer:

B.

Image 1.2 -

Without the existance of stomata, the process of transpiration wouldn't be possible if there weren't structures thata allowed the exchange of gases.

Answer:

A.

Image 2 -

So, we can elminate plants because they can photosynthesise; bacteria because they are prokaryotes and can photosynthesise; archaea because they are prokaryotes; hat leaves us with animals and fungi because these cannot photosynthesise and are both eukaryotes.

But, we cannot skip information. It is also said that the organism found has a cell wall, and animals do not have cell walls.

Answer:

C.

Image 4 -

Option 1 = cilia

Option 2 = flagella

Option 3 = pseudopods

Option 4 = pili (they're a meant to attacht to surfaces only bacteria)

Image 5 -

Runner stems are those that grow horizontally, therefore the fourth image with the long horizontal stems.

Rhizome stems are underground stems that can form roots or shoots through their nodes. Therefore, the third image with white background (the one with 2 drawn plants).

Tuber stems are large underground (mostly) structures used as storages for the plant. Therefore, this corresponds to the first image (the one with the white background.

Bulb stems are short and "bulby" stems, whith thick, leaves. Therefore, the second image (the one with the grass background).

Hope it helped,

BioTeacher101

7 0
3 years ago
Which describes the greenhouse effect? an artificial process a dangerous process a natural process a new process
Yuri [45]
The answer would be a dangerous process, this is because the greenhouse effect traps gasses such as CO2 and other harmful gasses emitted from the Earth, that can ultimately lead to problems in the future.

The greenhouse effect is also the reasoning behind why scientist believes in Global warming and climate change. 

Plus, the greenhouse effect is neither natural, new, nor artificial.
9 0
3 years ago
Read 2 more answers
Which of the following is homozygous dominant? a AA b Aa c aa
GarryVolchara [31]

Answer: a). AA

Explanation: Every trait is controlled by at least a pair of gene. Genes have different forms known as alleles. Alleles can be dominant or recessive. A dominant allele expresses itself in the presence of a recessive allele and masks the effect of a recessive allele. A recessive allele cannot express itself in the presence of a dominant allele and it's effect is masked by a dominant allele. Dominant alleles are usually written in upper cases such as A, T, while recessive alleles are usually written in lower cases such as a, t. The two alleles that determines a trait is called a genotype. A genotype can be homozygous if the two alleles are identical such as in AA or aa

and can be heterozygous if the two alleles are not identical such as in Aa, Tt.

6 0
3 years ago
Plz hurry tyy! I will give branliest!!
sveticcg [70]

Answer:

A scope built of two systems of lenses ... ==> Compound light microscope

Explanation:

8 0
2 years ago
marrisa and seaan are in the process of adopting a baby. One of the documents the adoptionsgency provides is a full medical hist
choli [55]

Answer:

The father's medical history is a record of the diseases and health conditions of the Father. The Father and child are family members who share genes.

Explanations:

They may also have some health conditions in common.

8 0
4 years ago
Read 2 more answers
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