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slega [8]
3 years ago
7

Why must dna be able to make copies of itself ​

Biology
2 answers:
dem82 [27]3 years ago
5 0

DNA Replication How DNA Makes Copies of Itself. Before a cell divides, its DNA is replicated (duplicated.) Because the two strands of a DNA molecule have complementary base pairs, the nucleotide sequence of each strand automatically supplies the information needed to produce its partner

worty [1.4K]3 years ago
4 0
If DNA never replicated, meiosis and mitosis would slowly halve the size of the genome until each cell would die


In other words it is important for DNA to double itself to account for the cells splitting during mitosis/meiosis.
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List the four spheres of the earth and describe three examples of processes that represent an exchange of
lesantik [10]

Answer:Four spheres of earth are:1)Lithosphere(land)  2)Hydrosphere(water) 3)Biosphere(living things) 4)Atmosphere(air).

Energy and matter flow through Earth's four spheres.Energy flows through the atmosphere and hydrosphere mostly by convection.The continuous cycling of matter and energy through earth's system makes life on earth possible .Others are driven by energy from the sun.

Explanation:

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3 years ago
Follicle stimulating hormone (FSH) is secreted by which gland?
Slav-nsk [51]
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The table shows the number of cells at each stage of the cell cycle in a root tip meristem. One complete cell cycle takes 24 hou
topjm [15]

Answer:

im completing a challenge

Explanation:

3 0
3 years ago
A client comes to the physician's office for a follow-up visit 4 weeks after suffering a myocardial infarction (MI). The nurse t
frutty [35]

The question is incomplete.

The complete question is:

A client comes to the physician's office for a follow-up visit 4 weeks after suffering a myocardial infarction (MI). The nurse takes this opportunity to evaluate the client's knowledge of the ordered cardiac rehabilitation program. Which evaluation statement suggests that the client needs more instruction?

A. "Client performs relaxation exercises three times per day to reduce stress."

B. "Client walks 4 miles in 1 hour every day."

C. "Client's 24-hour dietary recall reveals low intake of fat and cholesterol."

D. "Client verbalizes an understanding of the need to seek emergency help if his heart rate increases markedly while at rest."

Answer:

Option B. "Client walks 4 miles in 1 hour every day."

Explanation:

A myocardial infarction (MI) or heart attack occurs when there is no sufficient blood supply to the heart due to less blood flow which causes damage to the heart muscle.

After 4 weeks of MI, a client will be provoded more instruction on the basis that " Client walks 4 miles in 1 hour". The physician should suggest him to walk for 2 miles in less than 1 hour as walking 4 miles in 1 hour can cause another MI due to increase in the oxygen demand of heart.

Therefore, client should be provided precautions regarding appropriate exercise. Client will be notified about the cardiac rehabilitation program that include relaxation exercises, to follow low-cholesterol diet, and seeking emergency help if heart rate increases suddenly.

Thus, the correct option is B.

4 0
3 years ago
Does fuel burn more slowly in places with lower atmosphere pressure
likoan [24]
Fuel does burn faster
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3 years ago
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