Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Differentiate between secondary consumers and secondary carnivores?

Find out how different functional areas of the brain can be mapped?

Give a neat and labelled sketch of the germinating angiospermic pollen grain.

Identify A, B, C and D in the following table with reference to birth control.

Method	Example
A	Diaphragm
Female sterilisation	B
C	Saheli
D	Cu-T

What is aquaculture? Give example of an animal that can be multiplied by aquaculture.

Certain molecular processes are given in column (A). Provide the terms given to these processes in column (B), after selecting them from the terms:
Recombination, gene regulation, prokaryotic transcription, eukaryotic transcription, translation, replication, gene transfer, DNA fingerprinting

S.No.	Column A	Column B
(i)	DNA → DNA
(ii)	DNA → hRNA
(iii)	mRNA → Protein
(iv)	Repressor Protein + Operator → No transcription

Write the causative agent of filariasis in humans. Mention its mode of transmission and symptoms of the disease.
OR

1. Write the scientific names of the two species of filarial worms causing filariasis.
2. How do they affect the body of infected persons?

How will you explain artificial selection in terms of evolution?

Why are papaya and date palm plants said to be dioecious whereas cucurbits and coconut palms monoecious, in spite of all of them bearing unisexual flowers?