NEET Biology – Plant Growth And Development MCQs

Plant Growth And Development MCQs

Question 1. The germinal layer formed from the trophoblast of the mammalian blastocyst is:

1. Ectoderm
2. Endoderm
3. Mesoderm
4. None of the above.

Answer: 4. None of the above.

Question 2. Development of which trait freed land vertebrates from water:

1. Four appendages
2. Four chambered heart
3. Cleidoic egg
4. Lungs.

Answer: 3. Cleidoic egg

Question 3. Spermatogenesis involves :

1. Mitosis
2. Meiosis
3. Both (A) and
4. Metamorphosis.

Answer: 3. Both (A) and

Question 4 . Vegetal hemisphere of the egg has :

1. Germinal
2. vesicle Yolk
3. Pigment
4. Grey crescent.

Answer: 2. vesicle Yolk

Question 5. Grey crescent develops in :

1. Eye of Frog
2. Fertilised egg of Frog
3. Brain of Rabbit
4. Eye of Cockroach.

Answer: 2. Fertilised egg of Frog

Question 6. During embryonic development, the establishment of polarity along the anterior/posterior, dorsal/ventral or medial/lateral axis is called :

1. Pattern formation
2. Organizer phenomena
3. Axis formation
4. Anamorphosis.

Answer: 2. Organizer phenomena

Question 7. Which cell organelle is absent in human sperm?

1. ER
2. Mitochondria
3. Nucleus
4. Centrioles.

Answer: 1. ER

Question 8. The origin of kidney and ureter in Rcmci tigrina is :

1. All mesodermal
2. All endodermal
3. Ectodermal and mesodermal
4. Eesodermal and endodermal.

Answer: 1. All mesodermal

Question 9. In a vertebrate which germ layer forms the skeleton muscles?

1. Ectoderm
2. Endoderm
3. Mesoderm
4. Mesoderm and ectoderm.

Answer: 3. Mesoderm

Question 10. In which of the following organisms testes descend into scrotum in breeding season but in non-breeding season goes up?

1. Frog
2. Kangaroo
3. Shrew
4. Bat.

Answer: 4. Bat.

Question 11. The proliferation of endometrium of the uterus is controlled by :

1. Relaxin
2. Oxytocin
3. Progesterone
4. Oestrogen
5. Luteinizing hormone.

Answer: 4. Luteinizing hormone.

Question 12. Which of the following is a technique of direct introduction of gametes into the oviduct?

1. MTS
2. ET
3. IVF
4. POST.

Answer: 3. IVF

Question 13. Oral contraceptives are prescribed in females to check :

1. Entry of sperm into the vagina
2. Implantation
3. Ovulation
4. Fertilization.

Answer: 3. Ovulation

Question 14. Which one of the following systems is not mesodermal in origin?

1. Circulatory system
2. Muscular system
3. Nervous system
4. None of these.
5. Answer: 3. Nervous system

Question 15. Arrhenotoky is related to :

1. Parthenogenesis
2. Wax formation
3. Both and
4. None of these.

Answer: 1. Parthenogenesis

Question 16. The sequence of hormones during the menstrual cycle is :

1. Oestrogen, progesterone and FSH
2. Progesterone, oestrogen and FSH
3. FSH, oestrogen and progesterone
4. FSH, progesterone and oestrogen.

Answer: 3. FSH, oestrogen and progesterone

Question 17. Sperm enters the ovum mainly :

1. Mechanically
2. Chemically
3. Thermally
4. Electrostatically.

Answer: 2. Chemically

Question 18. In human females, ovulation occurs during the menstrual cycle :

1. At the beginning of the proliferative phase
2. In the middle of the secretory phase
3. At the end of the proliferative phase
4. Just before the end of the secretory phase.

Answer: 3. At the end of the proliferative phase

Question 19. Nebenkem is a part of :

1. Human ovum
2. Human sperm
3. Foetus
4. Graafian follicle.

Answer: 2. Human sperm

Question 20.Yellow-coloured milk secreted by cattle soon after the birth of a calf is called :

1. Cholesterol
2. Colostrum
3. Chyme
4. Chyle.

Answer: 2. Colostrum

Question 21. Mammary glands are modified :

1. Sebaceous glands
2. Sweat glands
3. Cutaneous glands
4. Scent glands.

Answer: 2. Sweat glands

Question 22. Which of the cellular layers disintegrates and regenerates again and again in humans?

1. The cornea of the eye
2. Endometrium of uterus
3. Dermis of skin
4. Endothelium of blood vessels.

Answer: 2. Endometrium of uterus

Question 23. The acrosome of spermatozoa is formed from :

1. Lysosomes
2. Mitochondria
3. Ribosomes
4. Golgi bodies.

Answer: 4. Golgi bodies.

Question 24. If the mammalian ovum fails to get fertilized, which one of the following is unlikely?

1. Corpus luteum will disintegrate
2. Estrogen secretion further decreases
3. Primary follicle starts developing
4. Progesterone secretion rapidly declines.

Answer: 2. Estrogen secretion further decreases

Question 25. Grey crescent is the area :

1. At the point of entry of sperm into the ovum
2. Just opposite the site of entry of sperm into the ovum
3. At the animal pole
4. At the vegetal pole.

Answer: 2. Just opposite to the site of entry of sperm into the ovum