Home
Class 11
BIOLOGY
Assertion: Algae shown only anisogamous ...

Assertion: Algae shown only anisogamous type of reproduction.
Reason: In algae, gametes can never be non flagellated.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

if both assertion and reason are true but reason is not the correct explanation of assertion

C

if assertion is true but reason is false.

D

if both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D

Sexual reproduction in algae takes place thorugh fusion of two gametes. These gametes can be flagellated and similar in size (as in Chlamydomonas) or non-flagellanted (non-motile) but similar in size (as in Spirogyra). Such reproduction is called isogamous.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion : Algae and fungi switch to asexual method of reproduction before the onset of adverse conditions. Reason : Asexual reproduction may introduce variations and leads to the formation of many clones.

Assertion : Isogametes are formed in majority of sexually reproducing organisms. Reason : Morphologically distinct type of gametes are called isogametes.

Assertion : In plants, apomixis is a form of asexual reporduction that minics sexual reproduction. Reason : Apomixis involves the production of seeds without the fusion of gametes.

Assertion : Nucleic acid complexes alone cannot cause diseases. Reason : Only nucleoproteins can function as infectious agents.

Assertion: Brown algae vary from olive green to brown in colour. Reason: Fucoxanthin is responsible for color variation in brown algae

Assertion : Some female animals permit copulation only during oestrous cycle. Reason : Oestrous cycle is observed in non-primate mammals.

Assertion : Only the pre-pollination growth of male gametophyte occurs inside the microsporangium whereas the remaining growth occurs over the female reproductive organs. Reason : Whole of the growth of female gametophyte occurs inside the megasporangium.

Assertion : Ribosomes are non-membrane bound organelles found in the prokaryotic cells only. Reason : Ribosomes are present only only in the cytoplasm.

Assertion : The law of independent assortment can be studied by means of dihybrid cross Reason : The law of independent assortment is applicable only to linked genes

Assertion : The maxiumum frequency of recombination, that can result from crossing over between linked genes is 50 percent Reason : Linked genes shown higher frequency of crossing over if distance between them is longer.