Ans.
In humans, there are total of 46 chromosomes in each cell that show 23 pairs of chromosome. During reproduction, meiosis occurs in germ cells that leads to formation of daughter cells or gametes that contain half of the chromosomes as present in parent cells. Thus, each gamete (either male or female) contains 23 chromosome.
During fertilization, fusion of male gamete or sperm(with 23 chromosomes) and female gamete or ovum(with 23 chromosomes) to form zygote that develops into multi-cellular offspring with 46 chromosomes.
Thus, 'a child inherit 46 chromosomes from his or her parent (23 chromosomes from each parent).'
Answer:
b. They are carried throughout the body in the bloodstream, and each hormone affects target cells that have receptors for it.
Explanation:
Hormones are secreted by hormonal glands after they get signals to secrete or release the hormone. Then these hormones are carried by the bloodstream to their destination. Each hormone has its target organ or tissue which do not response to other hormones because it the cells in those tissue have specific receptor which binds to specific hormones.
For example, luteinizing hormone in male is produced by the pituitary gland which reach to the testis through blood and influence the Leydig cell to release testosterone. So Leydig cells have receptors for LH not for insulin hormone so it binds specifically to LH hormone. So the correct answer is b.
The dry prairies in Florida are the primary habitats of low shrubs and grasses. The area lacks trees because of naturally occurring fires, and it also holds the rain water for longer period of time, which inhibits the growth of pine trees. It is a habitat for some rare animals including, Florida burrowing owls, Federally threatened crested caracaras, and <span>endangered grasshopper sparrows. </span>
Answer;
Structure B (chloroplasts)
Explanation;
The process of Photosynthesis takes place inside plant cells in small things called chloroplasts. Chloroplasts contain a green pigment called chlorophyll. This pigment is responsible for absorbing light energy or sunlight from the sun that is used to breakdown or split water molecules into hydrogen ions and oxygen atoms, during the light-dependent stage of photosynthesis.
