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A function of lysosomes is
replication
hydrolysis
respiration
None of the above
B.
hydrolysis
Lysosomes is a simple spherical sac surrounded by a single membrane. They contain digestive or hydrolytic enzymes synthesised by RER.
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Mitochondria and chloroplasts are similar because
both have 80S ribosomes
both have nuclei
both have single membrane envelope
both have DNA
D.
both have DNA
Both are semi-autonomous organelles. Both of these possess circular DNA.
The oldest fossil belongs to which of the following group of plants/ animals?
Asteriodae
Rhodophyceae
Blue- green algae
Phaeophyceae
C.
Blue- green algae
The oldest fossiles belongs to blue-green algae, was found in the sediments of South Africa about 3.2 billion years ago.
Mehli's gland in tapeworm is associated with
respiration
reproduction
excretion
circulation
B.
reproduction
Mehli's gland in tapeworm is associated with reproduction. It is situated distally in the proglottid. The ootype is surround by numerous unicellular shell gland called Mehli's gland.
Which of the following animals has a tetramorphic colony?
Velella
Physalia
Obelia
Porpita
B.
Physalia
Physalia is tetramorphic in nature, it consists of
(i) a small dactylozooid with a long slender tantacle.
(ii) a gastrozooid with mouth but no tentacle.
(iii) a branched gonozooid, which bears both male and female gonophores.
(iv) a large dactylozooid with an enormous nematocyst bearing fishing tentacle.
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Mock Test Series
