genetics, evolution of life & ecological biodiversity - Category wise Question and Answer Practice Test with Solutions

Answer: (a)

AABb × aaBb

AaBB = 1; AaBb = 2; Aabb = 1; aabb = 0

Answer: (a)

Answer: (b)

ICBN (International Code of Botanical Nomenclature) - It is one of the codes of nomenclature which is independent of zoological and bacteriological nomenclature.

The code applies equally to names of taxonomic groups treated as plants whether or not these groups were originally so treated.

Answer: (d)

A. Producers are the green plants which synthesise their own food using sunlight.

B. Herbivores are primary consumers who feed on producers.

C. Carnivores are secondary consumers who feed primary consumers.

D. Top carnivores are tertiary consumers who feed on other carnivores.

Maximum energy is stored in the trophic levels of producers as they synthesise their own food. They occupy the lowest trophic level and energy is transferred from them to higher subsequent trophic levels. As the energy decreases each time it is transferred to the next higher trophic level, the lowest trophic level i.e. producers, have maximum energy.

Answer: (d)

Non-biodegradable substances like pesticide residues cannot be digested or consumed by organisms, so, they are just passed on to organisms of the next trophic level along with food. These non-biodegradable residues keep on accumulating.

The higher the trophic level an organism occupies in the food chain higher will be the accumulation of non-biodegradable pesticide residues.

This phenomenon is called biomagnification. So, the correct answer is 'Biomagnification'