Which of the following statements is incorrect?

NEET-2019 [Reproduction-in-Organisms] [class-xii ]

• Morels and truffles are edible delicacies.
• Yeasts have filamentous bodies with long threadlike hyphae.
• Claviceps is a source of many alkaloids and LSD.
• Conidia are produced exogenously and ascospores endogenously.
Correct Option: B  [ Yeasts have filamentous bodies with long threadlike hyphae. ]

Remark:

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?

NEET-2019 [Sexual-Reproduction-in-Flowering-Plants] [class-xii ]

• Ovules develop into embryo sac
• Ovary develops into fruit
• Zygote develops into embryo
• Central cell develops into endosperm
Correct Option: A  [ Ovules develop into embryo sac ]

Remark:

Is some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as:

NEET-2019 [Sexual-Reproduction-in-Flowering-Plants] [class-xii ]

• Parthenogenesis
• Syngamy
• Parthenocarpy
• Autogamy
Correct Option: A  [ Parthenogenesis ]

Remark:

Select the correct sequence of transport of sperm cells in male reproductive system:

NEET-2019 [Human-Reproduction] [class-xii ]

• Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus
• Testis → Epididymis → Vasa efferentia → Rete testis → Inguinal canal → Urethra
• Seminiferous tubules → Vasa efferentia → Epididymis → Inguinal canal → Urethra
• Testis → Epididymis → Vasa efferentia → Vas deferens → Ejaculatory duct → Inguinal canal ® Urethra ® Urethral meatus
Correct Option: A  [ Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus ]

Remark:

What is the fate of the male gametes discharged in the synergid?

NEET-2019 [Human-Reproduction] [class-xii ]

• One fuses with the egg and other fuses with central cell nuclei.
• One fuses with the egg, other(s) fuse(s) with synergid nucleus.
• All fuse with the egg.
• One fuses with the egg, other(s) degenerate(s) in the synergid.
Correct Option: A  [ One fuses with the egg and other fuses with central cell nuclei. ]

Remark:

Extrusion of second polar body from egg nucleus occurs:

NEET-2019 [Human-Reproduction] [class-xii ]

• simultaneously with first cleavage
• before entry of sperm into ovum
• after fertilization
• after entry of sperm but before fertilization
Correct Option: D  [ after entry of sperm but before fertilization ]

Remark:

Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the newborn infants because it contains:

NEET-2019 [Human-Reproduction] [class-xii ]

• Immunoglobulin A
• Macrophages
• Monocytes
• Natural killer cells
Correct Option: A  [ Immunoglobulin A ]

Remark:

Select the hormone-releasing Intra-Uterine Devices?

NEET-2019 [Reproductive-Health] [class-xii ]

• Lippes Loop, Multiload 375
• Progestasert, LNG-20
• Multiload 375, Progestasert
• Vaults, LNG-20
Correct Option: B  [ Progestasert, LNG-20 ]

Remark:

NEET-2019 [Reproductive-Health] [class-xii ]

• Pills, Emergency contraceptives, Barrier methods
• CuT, Pills, Emergency contraceptives
• Barrier method, Lactational amenorrhea, Pills
• Lactational amenorrhea, Pills, Emergency contraceptives
Correct Option: D  [ Lactational amenorrhea, Pills, Emergency contraceptives ]

Remark:

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F₁ generation, pink flowers were obtained. When pink flowers were selfed, the F₂ generation showed white, red and pink flowers.
Choose the incorrect statement from the following :

NEET-2019 [Principles-of-Inheritance-and-Variation] [class-xii ]

• Law of Segregation does not apply in this experiment.
• Ratio of F₂ is ¼ (Red): 2/4 (Pink): ¼ (White)
• Pink colour in F₁ is due to incomplete dominance.
• This experiment does not follow the Principle of Dominance
Correct Option: A  [ Law of Segregation does not apply in this experiment. ]

Remark: