Answer:
Adenine binds to guanine.
Explanation:
Rules of the base pairing are:
A with T
Purine base, adenine (A) pairs with the pyrimidine base, thymine (T).
C with G
Pyrimidine base, cytosine (C) pairs with purine base, guanine (G).
<u>(Option A is correct).
</u>
<u>(Option B is incorrect).
</u>
Nitrogenous bases are positioned in the inside helix structure like the rungs of a staircase due to hydrophobic effect and are stabilized by hydrogen bonding.
<u>(Option C and D is correct).
</u>
Answer: yes
Explanation: you need glucose to have energy
<h2>Functions of spleen</h2>
Explanation:
The major functions of spleen besides filtering the blood of foreign materials and phagocytosis of old defective erythrocytes are:
- Initiate immune responses against infections by liberation of antigen and activation of lymphocytes (T and B cells)
- Secretes bactericidal agents which act against invading bacteria
- Secretes interleukins which promote the growth of lymphocytes or antibodies that act against pathogens
- Reservoir: Pools blood by storing thrombocytes, immature erythrocytes.
- Hematopoiesis: Blood cells like erythrocytes, lymphocytes and monocytes develop and mature in spleen especially during the early fetal life.
Answer:
2. Hip bones
Explanation:
More than 40 million years ago, whales had ancestors who walked on land. Even now, they have a feature they inherited from them - hip bones. Scientists used to think that they are vestigial, i.e. that they lost their function. However, recently they discovered that these bones help whales (and other marine mammals who have them, such as dolphins) maneuver better mating.
Whales developed the rest of the listed features later, when they became marine animals. This is why they are incorrect.
Could you possibly tell me what exactly you need help with? As my computer already has viruses, I am surely not going to click on any of those. Sorry!
