Question 4 :
The sperm and the egg make different contributions to zygote. Which of the following statements about their contributions are true? <br>(i) Sperm contributes most of the mitochondria. <br>(ii) Egg contributes most of the cytoplasm. <br>(iii) Both sperm and egg contribute haploid nucleus. <br>(iv) Both sperm and egg contribute centrioles.

Question 5 :
Ovulation in the human female normally takes place during the menstrual cycle

Question 8 :
To form embryo in vitro, the male gamete is transferred into female gamete directly. Such technique is called

Question 9 :
Which of the following contains a fluid filled cavity called antrum?

Question 11 :
The parenchyma tissue which forms the bulk of ovule where the sporogenous tissue is produced is -

Question 12 :
Assertion: Amniocentesis is a process of foetal sex determination.<br> Reason: Metabolic errors and other diseases can be diagnosed prenatally by this process.

Question 14 :
<p>The edges of infundibulum possess finger-like projection called …A… which helps in the collection of ovum. The infundibulum leads to wider part of the oviduct called …B… . Last part of oviduct, …C…. has narrow lumen and joins to uterus.</p><p>A, B and C in the above statement refers to</p>

Question 15 :
A change in the amount of yolk and its distribution in the egg will affect

Question 18 :
Most of the organs/system in foetus are formed by the end of

Question 20 :
Which of the following is true regarding the male reproductive system?

Question 21 :
The epidermis of the skin is derived from the germinal layer

Question 22 :
Through which cell of the embryo sac, does the pollen tube enter the embryo sac?

Question 24 :
What do A, B, C and D represent?<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5f24ebd59327967e89c20af3" />

Question 25 :
Which of the following depicts the correct pathway of transport of sperm?

Question 28 :
Select the correct statements regarding oogenesis. <br>(i) It is initiated during the embryonic development stage when millions of oogonia are formed within each ovary. <br>(ii) Graafian follicle releases primary oocyte from the ovary by ovulation. <br>(iii) At puberty only 60,000 – 80,000 primary follicles are left in each ovary. <br>(iv) Secondary oocyte within tertiary follicles grows in size and completes its second meiotic division.

Question 32 :
Which of the following are the important floral rewards to the animal pollinators?

Question 35 :
<b>Assertion</b> : Amniocentesis is often misused. <br><b>Reason</b> : Amniocentesis is meant for determining the genetic disorders in the foetus, but it is being used to determine the sex of the foetus, to kill the normal female foetus.

Question 37 :
<b>Assertion</b> : Head of sperm consists of acrosome and mitochondria. <br><b>Reason</b> : Acrosome contains spiral row of mitochondria.

Question 38 :
Assertion : Ovary is surrounded by integument.<br>Reason : Endothelium is a modified integument.

Question 41 :
The number of nuclei migrating from each of the micropylar quartet and chalazal quartet to the centre of the normal embryo sac is

Question 42 :
In man sperms move after ejaculation at a rate of nearly

Question 43 :
A diploid female plant and a tetraploid male plant are crossed. The ploidy of endosperm shall be

Question 48 :
Which is the most logical sequence with reference to the life cycle of angiosperm ?

Question 49 :
If the developing microspore mother cells draw nourishment by contacting the tapetal cells, the type of tapetum is called