C. Mutations may produce new characterists .
You have to understand that MAY is also in the answer, therefore SOMETIMES changes in genetic makeup can happen, but not always.
I hope this helps you!
The spores produce two types of gametophytes: each microspore develops into a microgametophyte (male gametophyte), which ultimately produces male gametes (sperm), and each megaspore produces a megagametophyte (female gametophyte), which ultimately produces female gametes (eggs).
Answer:
The mutagen might alter the DNA sequence, thereby altering the accessibility to transcription factors and thus activate the expression of oncogenes involved in cell proliferation
Explanation:
The DNA molecule consists of two antiparallel strands of nucleotides that wind around each other. Each DNA strand is formed by a backbone containing sugar (deoxyribose) and phosphate groups. This arrangement allows for DNA replication and transcription (and consequently also protein synthesis) to occur. If a mutagen agent binds to DNA, this might modify its structure, thereby altering DNA replication and transcriptional activity.
Answer:
<h2>(b). two capillary beds.</h2>
Explanation:
- A human has a complete circulatory system that plays an important role in the circulation of the blood in the body of the human.
- Generally, there are two vessels that are responsible to transport the oxygenated blood and deoxygenated blood in the body.
- Generally, the artery carries oxygenated blood except for the pulmonary artery and the other is the vein that transports the deoxygenated blood except for the pulmonary vein.
- Capillaries are the microscopic vessel that is originated from the artery and connects the venules.
- When they are present in the form of a network is generally known as capillary beds and plays an important role in the exchange of nutrients, gases and other materials between the tissues cells and the blood.
- They are categorized as two capillaries bed, three capillaries bed and some other on the basis of the capillary in a network.
- Two capillary beds play an important role in the delivery of blood from the heart to the thumb and from thumb to the left ventricles.
Answer:
that's very broad, is that the whole question?