Science : Ch 08 – How do Organisms Reproduce

This test is designed based on NCERT Syllabus for Class 10 Topics : How do Organisms Reproduce

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

The number of chromosomes in parents and offsprings of a particular species remains constant due to: Halving of chromosomes during gamete formation

Doubling of chromosomes after zygote formation

Halving of chromosomes during gamete formation

Doubling of chromosomes after gamete formation

Halving of chromosomes after gamate formation

2 / 15

Choose the precise statement(s) on budding in yeast from the following:

A parent cell divides into two or more daughter cells and here the parent identity is lost

In this the elongated nucleus divides to form two or more daughter nuclei.

A bud arises from a particular region on a parent body

After detaching from the parent body the bud grows into a new independent individual

3 / 15

The length of pollen tube depends upon the distance between:

Pollen grain and upper surface of stigma

Pollen grain on upper surface of stigma and ovule

Pollen grain in anther and upper surface of stigma

Upper surface of stigma and lower part of style

4 / 15

During adolescence, several changes occur in the human body. mark one change from the following associated with sexual maturation in boys:

Loss of milk teeth

Increase in height

Cracking of voice

Weight gain

5 / 15

Assertion (A): A basic event in reproduction is the creation of a DNA copy. Reason (R) : The DNA in the cell nucleus is the information source for making proteins.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true but (R) is not the correct explanation of the assertion

(A) is true but (R) is false

(A) is false but (R) is true

6 / 15

Example of unisexual fowers.

Papaya

Mustard

Hibiscus

Rose

7 / 15

What is the mode of asexual reproduction in hydra?

Fragmentation

Binary Fission

Spore Formation

Regeneration Or Budding

8 / 15

What is the mode of asexual reproduction in Rhizopus

Spore Formation

Fragmentation

Budding

Binary Fission

9 / 15

Which of the following is a Bacterial STD?

Warts

Syphilis

Hiv-Aids

All Of These

10 / 15

which of the following is a viral STD?

Gonorrhoea

Syphilis.

Both 1 & 2

HIV-Aids And Warts

11 / 15

Name the organ that produces sperms in human males.

Testes

Testosterone

Both 1 & 2

None Of These

12 / 15

Which pollination increases genetic uniformity and decreases variations

Cross Pollination

Self Pollination

Both 1 & 2

None Of These

13 / 15

A surgical method of Blocking vas deferens to prevent pregnancy is done for

Females

Males

Both 1 & 2

None Of These

14 / 15

Total number of chromosomes present in human beings are

46

23

24

48

15 / 15

The number of chromosomes shared from both male & female are

26 from each

23 from each

46 from each

12 from each

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Science : Ch 08 – How do Organisms Reproduce

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