Which of the following statement is correct?
(1) Both in humans and in Drosophila, the female is heterogametic and the male is homogametic
(2) In birds, males have a pair of Z-chromosomes besides the autosomes and a female bird has Z and W chromosomes
(3) In honey bee, the females are diploid having 32 chromosomes and males are haploid having 16 chromosomes
(4) Since genes are known to be located on chromosomes, alteration in chromosomes results in abnormalities or aberrations
Choose the correct answer from the options given below:

Match Column ‘A’ with Column ‘B’ and select the suitable answer from the codes given below:

Which of the following statement(s) is/are correct?

{i}Collagen is the most abundant protein in animals.
{ii}RuBisCO is the most abundant protein in plants.
{iii}Z-DNA is the most common double helical structure found in nature.

Match Column I (taxonomic rank) with Column II (example/term) and choose the correct code.

Given below are two columns:
Column I lists the names of scientists and Column II lists the discoveries made by them towards understanding photosynthesis in plants.
Match the scientists with the corresponding discoveries and choose the correct code.

Match the components of the Electron Transport System (ETS) of aerobic respiration with their respective electron carriers.

Observe the columns and match the plants/types in Column I to the morphological forms in Column II.

Choose the correct answer from the codes given below:

Consider the statements — identify the incorrect ones:
A. Inulin is a polymer of fructose.
B. Starch is present as storehouse of energy in plants.
C. Cellulose is a polymer of sucrose.
D. Chitin is a heteropolymer.
Choose the correct answer:

Human placenta is derived from:

Hormones secreted by the placenta to maintain pregnancy are:

Oral contraceptive pills help in birth control by: