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Zigmanuir [339]
4 years ago
7

Why does DNA duplication occur before cell division?

Biology
1 answer:
Westkost [7]4 years ago
7 0

Answer:

Because it tells the history of you're family and all the cultures

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Since most personal watercraft (pwc) do not have brakes, what must be done in order to avoid an obstacle?
Alex_Xolod [135]

With Personal Watercraft having no brakes, the best thing to do in avoiding obstacles is to take caution and slow down while operating the Personal Watercraft boat but when obstacles are ahead and you need to use methods, it is best to apply throttle and after that, steer quickly.

7 0
4 years ago
If you wanted to increase the rate of photosynthesis in a plant, you would develop a plant with which of the following character
ale4655 [162]
If you wanted to increase the rate of photosynthesis in a plant, you would develop a plant with many, broad leaves. This helps to get more sunlight. The correct answer is C, many, broad leaves. 
5 0
3 years ago
Read 2 more answers
Answer questions about aspects of Watson-Crick model of DNA structure
tino4ka555 [31]

Answer:

a. The directionality of the complementary strand is antiparallel. The double-stranded DNA is antiparallel comprising two strands, which run alongside each other, however, point in reverse directions. In a double-stranded molecule of DNA, the 5 prime ends of one strand align with the 3 prime ends of the other strand, and vice versa.  

b. The mediation of base pairing is done by non-covalent hydrogen bonds. It is reversible, that is, the strands can separate and can come combined again without any chemical modification.  

The specificity of base pairing is illustrated by hydrogen bonds that is, the first strand produces hydrogen bonds only with a particular base in the second strand, and these two bases produce a base-pair.  

c. The interaction or association of non-covalent type, that is, hydrophobic interaction and hydrogen bonding. Collectively, they both are strong. In the process, one base associate with the other base on the complementary strand.  

d. The phosphate backbone possesses the tendency to associate with water on the outside of the molecule, and this is favorable chemically as both the strands are held together by hydrogen bond and hydrophobic interaction.  

The polar molecules of sugar can produce hydrogen bonds with the surrounding molecules of water. The negatively charged phosphate group associate with the positively charged ions. The nonpolar nitrogen bases are found within the molecule and associate favorably through stacking interactions.  

6 0
3 years ago
How do living organisms move CO2 into fossil fuels?
Afina-wow [57]

Answer:

Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO 2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels

Explanation:

3 0
3 years ago
"In which type of burn are the superficial cells of the epidermis destroyed, but the dermis remain mostly unaffected?"
Mariana [72]

Answer:

The correct answer is first degree burn.

Explanation:

Burns are classified into first degree, second degree, and third-degree burns. The first-degree burn is considered the mildest burn out of all three types. The example of first-degree burn is common sunburn.

In the first degree burn, the skin epidermis is affected but the dermis layer is not harmed. The area of burn appears red and is quite painful. No formation of blister occurs in the first-degree burn and it heals in 3-5 days.

The skin becomes dry at the burn area and it peels off and new skin comes which removes the old skin. Therefore the correct answer is first-degree burn.

4 0
3 years ago
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