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madam [21]
3 years ago
14

What type of bond keeps each individual DNA strand together?

Biology
1 answer:
bekas [8.4K]3 years ago
7 0
The answer is Hydrogen bonds
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What is the most likely reason that horses and mountain goats have hooves?
melisa1 [442]
<span>a. They have homologous structures because they have a common ancestor.

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What should I do I don't know
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A molted external skeleton. 
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A woman, S.R., had a maternal grandfather with hemophilia A (OMIM 306700), an X-linked recessive condition that reduces blood cl
Sidana [21]

Answer:

Hemophilia is a x-linked recessive inherited bleeding  disorder. in this disease blood does not clot properly due to the decreased level of blood clotting factor VIII (8) or factor IX (9).

In x-linked recessive condition, the disease is transmitted from father (affected male) to his daughter and mother (affected female) to her son and skip of generation getting affected is also occurs.

  • there will be 50% chance of her (S.R.) each son to be affected with hemophilia.

Explanation:

Hemophilia is caused due to mutation of one gene which is responsible for the making of proteins of  blood coagulation factor viii or ix. the affected person bleeds continuously from any injury and that can cause serious issues.

here,

grandfather of s.r is affected (xₐy) and grandmother is normal (xx) will produce

                                                   ↓

 s.r's mother who is a carrier (xₐx) [as xₐy and xx will produce 100% carrier xₐx daughter]

                                                    ↓

s.r's mother is a carrier (xₐx) but her father is normal (xy) will produce,

                                                   ↓

s.r who has 50% chance of being carrier (xₐx) and 50% chance of being normal (xx) [as she is the only child] and she has a normal (xy) partner, they will give,

                                                     ↓

  1. if s.r is a carrier (xₐx) then one of her son will be affected (xₐy)   [as xₐx and xy =xₐy]
  2. if s.r is normal (xx) then her son will be normal (xy) [as xx and xy will give xy]

here,<u> 50% chance of her son to be affected with hemophilia</u> [as S.R of being affected is more considerable].

8 0
3 years ago
A chronic bone disease that is characterized by the abnormal breakdown of bone followed by abnormal bone formation is known as
Sidana [21]

Answer:

Paget's disease

Explanation:

  • When cellular deforming and remodelling of many bones takes place and this occurs as a chronic condition then this is known as Paget's disease.
  • There is excessive breakdown of bone as well as disorganised formation of new bones.
  • Such problem leads to weakening of the bone due to which complications such as deformity, fracture and arthritis occurs.
  • The disease does not spread from one bone to another and the entire skeleton is not affected in such a disease, it only affect few or more bones.
  • There is currently no known cure for the disease.
4 0
2 years ago
Why are groups of small cells better than one large cell at moving material in
quester [9]

Answer:

C. They have a greater surface-to-volume ratio.

Explanation:

Because these smaller cells can access and pass through the membranes of the other cell membranes and permeable coverings easily and voluntarily unlike larger cells. It is also efficient for these smaller cells to penetrate and travel, delivering and transporting goods and materials such as nutrients, oxygen and waste throughout the body without consuming enough energy and conserving lesser space.

For simple reasons, they are faster, more efficient and consumes little space, and most especially depletes lesser energy. So, many small cells have more surface area than one large cell.

5 0
3 years ago
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