Biology-Reproduction [NSO Level 1- Science Olympiad (SOF) Class 12]: Questions 1 - 4 of 7

Access detailed explanations (illustrated with images and videos) to 60 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Unlimited Access for Unlimited Time!

View Sample Explanation or View Features.

Rs. 100.00 or

How to register?

Question number: 1

» Biology » Reproduction

Edit
MCQ▾

Question

Which of the following statements are correct for ZIFT procedure?

Choices

Choice (4)Response

a.

Zygote is collected from female donor and transferred to the fallopian tube.

b.

Zygote is collected from female donor and transferred to the uterus.

c.

Ova are transferred to uterus after collecting from female donor.

d.

For Zygote formation ova are collected from female donor and are transferred to the fallopian tube.

Question number: 2

» Biology » Reproduction

Edit
MCQ▾

Question

There is a situation in which sperm fusing with secondary nucleus is obtained from one pollen tube and sperm fusing with egg from another due to discharge of contents of more than one pollen tubes in an embryo sac. What has occurred in this case?

Choices

Choice (4)Response

a.

Heterofertilisation

b.

Polyspermy

c.

Polygamy

d.

All of the above

Question number: 3

» Biology » Reproduction

Edit
MCQ▾

Question

There are low failure rates of contraceptives Estrogens and progestins. How do they work?

Choices

Choice (4)Response

a.

Preventing implantation of blastocyst

b.

Preventing ovulation by suppressing LH surge

c.

Preventing sperm from entering uterus

d.

Preventing sperm from reaching egg

Question number: 4

» Biology » Reproduction

Edit
MCQ▾

Question

The unfertilized secondary oocyte undergoes autolysis during the bleeding phase of menstrual cycle then what will be the interplay of hormones at that time?

Choices

Choice (4)Response

a.

Progesterone inhibits the release of LH from pituitary causing regression of corpus luteum

b.

Hypertrophy of endometrial lining is continued by progesterone and estrogen.

c.

Regression of corpus luteum occurs because of LH level reduced by Prolactin and progesterone

d.

Progesterone secretion is inhibited by prolactin and estrogen which leads to sloughing off of uterine lining.

Developed by: