Biology - Study Mode

[#266] Pollen grains in plants are produced in
Correct Answer

(C) flower

Explanation

Solution: Pollen grains in plants are produced in flower.

[#267] Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?
Correct Answer

(D) By denitrification

Explanation

Solution: Nitrogen is not fixed in ecosystems by denitrification.

[#268] Ptyalin is an enzyme produced in the
Correct Answer

(A) salivary glands

Explanation

Solution: Ptyalin is produced by the salivary glands, whereas pancreatic amylase is secreted by the pancreas into the small intestine.

[#269] Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes
Correct Answer

(C) cholera

Explanation

Solution: Vibrio cholerae (also Kommabacillus) is a gram negative comma-shaped bacterium with a polar flagellum that causes cholera in humans

[#270] Biotic component of the environment does not include-
Correct Answer

(A) Soil system

Explanation

Solution: Animal, Micro organism and Plants are biotic components of the environment while soil along with other landforms are non-biotic components of the environment.