Tag: structure and functions of living organisms -ii
Questions Related to structure and functions of living organisms -ii
Which of the following cells are present in mammalian testes and help to nourish sperms
Assertion : There is generally monospermy in most of animals.
Reason : Vitelline membrane of ovum checks polyspermy.
In most of the mammals the testes are situated outside the abdominal cavity because
Assertion : In morula stage, cells divide without increase in size.
Reason : Zona pellucida remain undivided till cleavage is complete.
In common Turtles the females are predominant at
In crocodiles male sex is predominant at
Choose the correct answers from the alternatives given.
Reproduction
State whether the following statements are true or false.
Humans have greater reproductive potential than bacteria
In mammals the testes lies in scrotal sacs due to-
Consider the following effects of genetic engineering:
1. Disease resistance
2. Growth promotion
3. Cloning
4. Longevity
Of these effects, those that have been tried out with a certain amounts of success include