Free Plant Kingdom (Daily Quiz: 8) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Free Plant Kingdom (Daily Quiz: 8) Time:

Question-1

Assertion:
Development of zygote into young embryo takes places within the female gametophytes in Pteridophytes.
Reason:
This event is a precursor to seed habit, considered an important step in evolution.

(a)

(b)

(c)

(d)


Question-2

A gymnospermic leaf carries 16 chromosomes. The number of chromosomes in its endosperm will be

(a)

(b)

(c)

(d)

Explanation:

Answer: (a)

Gymnosperms show distinct alternation of generations. The sporophytic phase is dominant. The sporphyte is differentiated into root, stem and leaves. So the number of chromosomes in a leaf cell is diploid (2n), (2n = 16). Double fertilization is absent in gymnosperms. The endosperm develops before fertilization directly from the megaspore. So the number of chromosomes in endosperm will be 8(n = 8).


Question-3

In Pinus/Cycas/gymnosperms, the endosperm is

(a)

(b)

(c)

(d)


Question-4

Which one of the following is categorised under living fossils?

(a)

(b)

(c)

(d)


Question-5

Assertion:
Red algae contributes in producing coral reefs.
Reason:
Some red algae secrete and deposit calcium carbonate over their walls.

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

Red algae generally grow attached to rocky stones. Some deep water red algae are calcareous and build up hard stony thalli responsible for the production of limestones and coral reefs.


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