Yes, it is correct. When a sperm with X chromosome fertilizes the egg, the resulting zygote would develop into a female child. When a sperm with Y chromosome fertilizes the egg, the resulting zygote would develop into a male child. A female has all the chromosomes as X.

Yes, inheritable traits bring a change in the genotype of the organism and hence, become inheritable.

Yes, it is correct. A biennial plant is a plant that takes two years to complete its biological lifecycle.

Yes, it is the correct answer. Stanley L. Miller and Harold C. Urey conducted the Miller-Urey experiment in 1953 to demonstrate how  life would have originated on the earth. They created an environment in laboratory, which mimicked the environment of earth as it was during the time of origin of life. Water, methane, ammonia and hydrogen were used in that experiment.

Yes, it is correct. The change in inherited traits in biological population over subsequent generations is called evolution.

Yes, the cross in which two pairs of characters are studied is called dihybrid cross.

Yes, this is the correct answer as all the three statements are true. Asexual reproduction involves a single parent, and is hence not ideal ideal for facilitating variations. Some minor variations do occur due to inaccuracies in DNA replication. But, the quantum of variations would be too little and would take too many years to show effect.

Yes, it is correct. a and c are not the salient features of Darwin theory. Organisms have unlimited capacity to reproduce and different individuals of a particular species have different traits.

Yes, it is correct. Organs which have different design but serve a common function in different animals are called analogous organs. Wings of bats are mainly composed of the digital bones and a thin membrane covering the structure. Yet, wings in both the organisms are used for flying.

Yes, bacteria is one of t he simplest and oldest organisms on earth. Its simple body design makes it survive the harshest climates.

Mendel took tall and dwarf (height) characters.

Yes, a pair of contrasting characteristics is called an allele.

The somatic cells in human beings have 23 pairs of chromosomes or 46 chromosomes

Yes, it is correct. The complete set of genes within an organism’s genome is called a genotype.

All three are correct. (d) is incorrect. A single pea pod has many seeds in it. This is not the reason due to which Mendel used pea plant in his experiments.