Biology Test 178

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Biology Test 178

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Weekly Quiz Competition

Question 1
4 / -1

Formation of gametophyte directly from sporophyte without meiosis is known as :-

A
Apogamy

B
Apospory

C
Parthenocarpy

D
Polyembryony
Question 2
4 / -1

Nucellar polyembryony is common in

A
Mango

B
China rose

C
Wheat

D
Rice
Question 3
4 / -1

What would be number of chromosome in aleurone layer if megaspore mother cell contain 18 chromosomes :

A
9

B
18

C
36

D
27

Solution

No. of chromosome in megaspore mother cell =18
2n = 18
megaspore mother cell is diploid
No. of chromosomes in alurone layer
Alurone layer is a part of endosperm and endosperm is triploid (3n)
2n = 18 so n = 9
3n = 27
(No. of chromosomes in alurone layer – 3n = 27)
Question 4
4 / -1

A typical angiospermic embryo sac contains

A
Three synergid cells at micropylar end

B
Two antipodal cells at chalazal end

C
One egg cell and two synergid cells at micropylar end

D
One polar nucleus
Question 5
4 / -1

Consider the following statements-

(i) In angiosperms, a typical embryosac at maturity is 7 nucleated, 8 celled.

(ii) Fertilisation in angiosperms is called double fertilisation because two male gametes involve in fertilisation.

(iii) Formation of endosperm always precedes development of the embryo.

Which of the above statements is/are correct?

A
(ii) only

B
(iii) only

C
(ii) and (iii) both

D
(i) and (iii) both
Question 6
4 / -1

Which of the following helps in elevation of testes ?

A
Gubernaculum

B
Inguinal canal

C
Cremaster muscle

D
Crura muscle
Question 7
4 / -1

Which of the following is not a part of female external genitalia ?

A
Labia majora

B
Labia minora

C
Vagina

D
Clitoris
Question 8
4 / -1

What do you mean by the term 'spermiogenesis?

A
Conversion of spermatids to sperm

B
Conversion of spermatogonium to spermatid

C
Conversion of spermatid to spermatogonium

D
Conversion of primary spermatocyte to secondary spermatocyte
Question 9
4 / -1

Find out which option is correct regarding diagrammetic presentation of spermatogenesis given below ?

A
Step 1 is correct but step 2 is incorrect

B
Step 1 and step 2 both are incorrect

C
Step 1 is incorrect but step 2 is correct

D
Step 1 and step 2 both are correct
Question 10
4 / -1

Which of the following option represents haploid and diploid stages of gametogenesis respectively?

A
Primary spermatocytes and secondary spermatocytes

B
Spermatogonia and primary spermatocytes

C
Spermatogonia and sperms

D
Secondary spermatocytes and primary spermatocytes.

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Biology Test 178

Result

Biology Test 178

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Rank

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SHARING IS CARING

Question 1

Apogamy

Apospory

Parthenocarpy

Polyembryony

Question 2

Mango

China rose

Wheat

Rice

Question 3

9

18

36

27

Solution

Question 4

Three synergid cells at micropylar end

Two antipodal cells at chalazal end

One egg cell and two synergid cells at micropylar end

One polar nucleus

Question 5

(ii) only

(iii) only

(ii) and (iii) both

(i) and (iii) both

Question 6

Gubernaculum

Inguinal canal

Cremaster muscle

Crura muscle

Question 7

Labia majora

Labia minora

Vagina

Clitoris

Question 8

Conversion of spermatids to sperm

Conversion of spermatogonium to spermatid

Conversion of spermatid to spermatogonium

Conversion of primary spermatocyte to secondary spermatocyte

Question 9

Step 1 is correct but step 2 is incorrect

Step 1 and step 2 both are incorrect

Step 1 is incorrect but step 2 is correct

Step 1 and step 2 both are correct

Question 10

Primary spermatocytes and secondary spermatocytes

Spermatogonia and primary spermatocytes

Spermatogonia and sperms

Secondary spermatocytes and primary spermatocytes.

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