33- Because both are ovary where the integuments of the ovary and the ovule fuse together forming a single seeded fruit.
34- Pollination process is necessary for the maturing of the ovary.
34- Pollination provides the flower with male cells needed for fertilization and stimulates the auxins necessary for developing the ovary into a mature fruit.
35- The maturation of the fruit and seeds leads to the end of the flower and may lead to the death in some plants.
35- Due to consumption of stored food and inhibition of hormones.
36- Man belongs to class mammalian.
36- In which the embryo develops inside the uterus till birth.
37- Man shows a high degree of care.
37- Where the young requires several years of raising due to the mental progress that god provided hins to be superior over other creatures.
38- The testes in man lie outside the body cavity in the scrotal sac.
38- Because this position is suitable to the spermatogenesis since this process requires low temperature.
39- Between the seminiferous tubules exist interstitial cells.
39- These interstitial cells secrete the male sex hormones.
40- In male reproductive system exists a prostate gland which surrounds the bladder's neck.
40- To secrete the nutritive fluid that also facilitates the motility of sperms and neurtralizes the acidity of the urine around them.
41- Male ejects 300-500 millions sperms per ejaculation.
41- These huge numbers of sperms, play an important role in their travel to reach the female ovum and to fertilize it.
42- The acrosome play an important role in fertilization.
42- It secretes enzymes which dissolve the hyaluronic acid which held the cells of the membrane which surround the ovum.
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43- Uterus play the main role in pregnancy.
43- Provides a safe place for completion of fertilization and embryo development till birth.
44- Each fallopian tube has a funnel-shaped.
44- This funnel-shaped opening with finger - like processes to receive the ova as they are shed by the ovary.
45- The vagina is elastic.
45- To allow distension during birth.
46- The period of such breeding cycle differes in various mammals.
46- In some mammals such as lion and tiger the cycle is annual, in cats and dogs per 6 months and in rabbit and rats is frequently per month.
47- The pituitary gland secretes FSH.
47- Stimulates the formation of graafian follicle.
48- After formation of graafian follicle the endometrium becomes rich in blood vessels.
48- Because it secretes esterogen which stimulates the growth of the endometruim. The lattter becomes rich in blood vessels and glands.
49- The pituitary gland secretes LH.
49- L.H causes the ovulation and converts the graafian follicle into corpus luteum.
50- The corpus luteum preserves the pregnancy.
50- Because it secretes the progesteron which preserve the endometrium during pregnancy.
51- The ovulation process stops during pregnancy.
51- Due to the existance of progesteron in blood during pregnancy.
52- Although the degeneration of the corpus luteum in the fourth month, the pregnancy remains.
52- Due to the formation of placenta which replace the corpus luteum to secrete the progesteron.
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53- The oral contraceptives consist of a combination of synthetic estrogen and synthetic progesteron.
53- Natural hormones are destroyed by the liver almost immediately, but the synthetic ones resist destruction.
54- The oral contraceptive stops menstrual cycle.
54- Because it stop ovulation.
55- Using of coil does not prevent menstruation.
55- Because coil doesn't prevent ovulation, but prevents the fertilized ovum to be implanted in the uterus.
56- Intended abortion is very dangerous.
56- It may destroy the endometruim and causes bleeding and infection.
57- The embryo of mammals is surrounded by the amniotic membrane.
57- This membrane contains amniotic fluid which protects the embryo against dryness and shocks.
58- Finger-like projections grow from the outer surface of the chorion.
58- This is the placenta, across it food and oxygen transfer from the mother's blood to the embryo by diffusion.
59- Both margins of the amnion join.
59- To form the umbilical cord.
60- In the ninth month the attachment between the fetus and the uterus becomes loosened.
60- The placenta dissociates gradually, thus progesteron decreases and the attachement decreases.
61- The milk of the mother is very important for the new-born baby.
61- The milk of the mother is the most valuable nutritive and emotional supply, protecting him from many somatic and physic diseases in his future.
62- The pregnancy is not preferred after 35 year old.
62- If the age exeeds that range, both the mother and the embryo will be subjected to serious problems, and the possibility to produce deformed babies will increase.
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63- The monozygotic twins have the same sex and genetic characters.
63- Because they produce from one ovum fertilized by one sperm. Thus they have the same genetic materials.
64- Embryo culture can be considered as asexual reproduction.
64- Because in it cells from early embryonic stages were separated, and each of it was cultured in a female uterus to produce a complete individuals have the same genetic materials.
Give the scientific term:
1- Some living organisms evolve from non living things.
1- Spontaneous generation.
2- Common reproduction in plants but limited in animals.
2- asexual reproduction
3- Protrusion arises from one side of the body of hydra due to division of interstitial cells.
3- A bud
4- The ability to regenerate lost parts of their bodies.
4- regeneratioin.
5- Adapted cell for direct growth into complete plant.
5- A spore
6- The ability of the egg to develop to a new individual without being fertilized.
6- parthenogenesis
7- Special kind of asexual and sexual reproduction.
7- parthenogenesis.
8- Growth of tissues in a semi-natural nutrient medium.
8- tissue culture.
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9- The fusion of two cell's contents.
9- conjugation
10- Green scum of standing waters.
10- spirogyra.
11- Coated zygote.
11- zygospore.
12- Conjugation between two filaments of spirogyra.
12- scalariform conjugation.
13- Conjugation between two adjacent cell of spirogyra.
13- lateral conjugation.
14- Degenerate cells in which the egg gets rid of half of its chromosomes.
14- polar body.
15- A phenomenon in the same life cycle that sexual generations followed by one or more asexual generations.
15- alternation of generation.
16- Division of the nuclei of sporozoits inside the hepatic cells.
16- shizogony.
17- The infected stage of plasmodium malaria.
17- sporozoit.
18- Period of time where the sporozoites spend inside the liver cells.
18- incubation period.
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19- The female organ in adiantum.
19- archigonia.
20- Plants whose seeds develop with a pericarp.
20- flowering plant.
21- The male reproductive leaflets in the flower.
21- stamen.
22- The outer whorl of the flower.
22- the calyx.
23- The female reproductive leaflets in the flower.
23- carpel.
24- Plant on it exist the male and the female flowers.
24- monocious plant.
25- Thin neck attaches over the ovary of the flower.
25- style.
26- Nucleus give two male nuclei in pollen grain.
26- generative nucleus.
27- Cord connects the ovule with the ovary wall.
27- funicle.
28- Minute hole in the integument which surround the ovule.
28- micropyle.
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29- Ovule in it the micropyle and the funicle lie on a straight line.
29- orthotropous.
30- Common ovule arrangement in plant.
30- anatropous.
31- The fusion of both male and female nuclei.
31- fertilization.
32- The arrival of pollen grains to the stigma.
32- pollination.
33- The fusion of male nucleus and the egg and the fusion of the other male nucleus with the two polar nuclei.
33- double fertilization.
34- A tissue supplies the early developing embryo with food.
35- endosperm.
35- A seed without endospermic tissue which is consumed during embryonic development.
36- exendospermic seed.
36- A hole that allows the passage of water inside the seed.
37- micropyle.
37- Fruit in which the integuments of the ovary and the ovule fuse together.
38- grain.
38- Sac in it exist the testes of man.
38- scrotum (scrotal sac)
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39- Accessory gland surrounds the bladder's neck in man.
39- prostate.
40- Accessory glands are situated just below the prostate gland.
40- cowper's glands.
41- Tubules in it the spermatogenesis occurred.
41- serminiferous tubules.
42- The gonads tissues in the seminiferous tubles.
42- spermatogonia.
43- Nutritive cells in the seminiferous tubules.
43- sertoli cells.
44- Glandular cells causes the secondary male characters in man.
44- interstitial cells.
45- Structure in the sperm secretes enzymes which help in penetration the ovum coat.
45- acrosome.
46- An acid that held the cells of the membrane which surround the mature ovum.
46- hyaluronic acid.
47- Certain periods where the ovary becomes regularly active in the adult female.
47- breeding cycle.
48- The releasing of the ovule from the ovary.
48- ovulation.
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49- Glandular structure in the ovary secretes the progesteron hormone.
49- corpus luteum.
50- A follicle stimulates the growth of the endometrium.
50- graafian follicle.
51- A hormone causes the ovulation.
51- L.H.
52- Age, where the ovaries become inactive and the uterine lining is wrinkled.
52- menopause.
53- Muscular ciliated tube that directs the ovum to the uterus.
53- fallopian tube.
54- A membrane which surrounds the mammalian embryo.
54- amnion.
55- The outer embryonic membrane
55- chorion.
56- Safe place for completion of fertilization and embryo development till birth.
56- uterus.
57- Finger - like projections grow from the outer surface of the chorion to be inserted in the endometrium.
57- placenta.
58- Structure formed by the joining of both margins of the amnion.
58- umbilical cord.
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59- Twins produced from two ova fertilized with two sperms.
59- Fraternal twins (dizygotic).
60- Twins may born partially attached to each other.
60- monozygotic twins (identical) or siamese
61- Twins born partially attached to each other.
61- siamese
62- Storage of gametes in frozen condition.
62- gamete banks.
63- Gradual accumulation of disintegrated molecules in the cells, specially in the structure of the chromosomes.
63- somatic mutation.
What is the result of:
1- If the spirogyra exists in unsutable condition.
1- It reproduce sexually by conjugation.
2- When the merozoites released from the red blood cells.
2- Symptoms of malaria fever appear.
3- The gametophyte of the adiantum exist in dry soil.
3- The pollination does not occur because the male gametes swim on water soil to reach the female gametes.
4- If we spray the stigma by indole acetic acid.
4- It activates the auxins of the ovary in order to mature it into seedless fruit.
5- If the testes remain inside the body cavity.
5- Whenever a testes fails to descend down into the scrotum, spermatogenesis does not occur, causing infertility.
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6- If the corpus luteum degenerates before the fourth month of pregnancy.
6- Abortion takes place due to absence of progesterone.
33- The wheat and maize are fruits not seeds.
4- If we spray the stigma by indole acetic acid.