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An anther with malfunctioning tapetum often fails to produce viable male gametophytes. Give any one reason.
Tapetum nourishes the developing pollen grain so in case of a malfunctioning tapetum the pollen grain will not get any nourishment and lose its viability.
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Why sharing of injection a needle between two individuals is not recommended?
Sharing of injection needles between two individuals is not recommended because it may lead to the transmission of HIV-infection and cause AIDS.
Name the enzyme and state its property that is responsible for continuous and discontinuous replication of the two strands of a DNA molecule.
The enzyme involved in the process of replication is DNA dependent DNA polymerase. This enzyme catalyzes polymerization only in one direction, i.e., 5’ → 3’. As a result on template strand with 3’ → 5’ the replication is continuous while on the template strand with polarity 5’→3’ replication is discontinuous.
Identify the examples of convergent evolution from the following:
(i) Flippers of penguins and dolphins
(ii) Eyes of octopus and mammals
(iii) Vertebrate brains
The examples of convergent evolution are:
(i) Flippers of penguins and dolphins
(iii) Eyes of octopus and mammals
Write the importance of MOET.
MOET – Multiple Ovulation Embryo Transfer is a method in which a cow is administered hormones with FSH (follicular stimulating hormone) like activity. These hormones induce follicular maturation and superovulation in which the cow produces 6–8 eggs per cycle instead of one egg. The cow is mated with an elite bull or artificially inseminated and the fertilized eggs at 8-32 stage is recovered non-surgically and transferred to a surrogate mother.
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Mock Test Series
