Fill in the blanks.
I. The structure formed by the fusion of a male gamete with a female gamete is called
and
2. In humans, fertilization is
animals are those which lay eggs.
In humans, male reproductive organs are
and
5. In humans, sperms are produced by
and eggs are produced by
6. Different stages in the life cycle of a butterfly are eggs,
(Give the stages in sequence.)
7. X and Y chromosomes are called
& Chemical substances secreted by endocrine glands are called
9.
gland is called the master gland.
10. Maturation of reproductive organs takes place during
11. Voice box is
in boys than that in girls.
12. Secondary sexual characters start developing during
Answers
Answer:
1. Zygote
2.Internal Fertilization
5. Female
6. There are four stages in the metamorphosis of butterflies and moths: egg, larva, pupa, and adult.
7.The X and Y chromosomes, also known as the sex chromosomes, determine the biological sex of an individual: females inherit an X chromosome from the father for a XX genotype, while males inherit a Y chromosome from the father for a XY genotype (mothers only pass on X chromosomes).
8.The cells in these glands secrete specific chemicals called hormones. Hormones circulate around the body via the blood stream and modulate cellular or organ functions by binding with receptors in the target cells. Hormones that stimulate and control the activity of other endocrine glands are called trophic hormones.
9.Pituitary Gland
10. Adolescence
11. bigger or you can write larger also
12.Secondary sexual characteristics including breast development appear at puberty in response to unopposed action of estrogens formed extragonadally from testosterone.
Explanation:
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Answer:
1. The term used to describe the male and female gametes fusion is fertilization. Fertilization occurs in the Fallopian tube and results in the development of the zygote or fertilized egg cell.
6. The young (called a larva instead of a nymph) is very different from the adults. It also usually eats different types of food. There are four stages in the metamorphosis of butterflies and moths: egg, larva, pupa, and adult.
7.The X and Y chromosomes, also known as the sex chromosomes, determine the biological sex of an individual: females inherit an X chromosome from the father for a XX genotype, while males inherit a Y chromosome from the father for a XY genotype (mothers only pass on X chromosomes).
The cells in these glands secrete specific chemicals called hormones. Hormones circulate around the body via the blood stream and modulate cellular or organ functions by binding with receptors in the target cells. Hormones that stimulate and control the activity of other endocrine glands are called trophic hormones.
10.Further development of the reproductive systems occurs at puberty. ... The increase in sex steroid hormones leads to maturation of the gonads and other reproductive organs. The initiation of spermatogenesis begins in boys, and girls begin ovulating and menstruating.
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