Assertion : Algae are heterotrophic , Reason : They do not have chlorophyll.
a.both assertion and reason are true and reason is the correct explanation of assertion
b.both assertion and reason are true and reason is not the correct explanation of assertion
c.assertion is true but reason is false
d.both assertion and reason are false
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d is the correct answer
REASON: green algae contain chlorophyll a and chlorophyll b. By contrast, diatoms, dinoflagellates, and brown algae do not contain chlorophyll b but do contain, in addition to chloro- phyll a, a characteristic green pigment,chlorophyll c (I, 2).
Algae, which live in water and whose larger forms are known as seaweed, isautotrophic. Phytoplankton, tiny organisms that live in the ocean, are autotrophs. Some types of bacteria are autotrophs. Most autotrophsuse a process called photosynthesis to make their food.
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