Biology - Study Mode

[#721] Scientist who discovered blood groups was
Correct Answer

(C) Karl Landsteiner

Explanation

Solution: Karl Landsteiner, was an Austrian biologist, physician, and immunologist. He distinguished the main blood groups in 1900, having developed the modern system of classification of blood groups.

[#722] Where do arteries carry blood?
Correct Answer

(A) Heart

Explanation

Solution: Arteries carry blood away from the heart. Pulmonary arteries transport blood that has a low oxygen content from the right ventricle to the lungs. Systemic arteries transport oxygenated blood from the left ventricle to the body tissues.

[#723] A species inhabiting different geographical areas is known as
Correct Answer

(A) Allopatric species

Explanation

Solution: A species inhabiting different geographical areas is known as allopatric species. This geographical isolation prevents mating between the two organism of same species.

[#724] Lichen is a composite combination of two organisms.
Correct Answer

(D) Algae and Fungi

Explanation

Solution: A lichen is a composite organism that emerges from algae or cyanobacteria living among the filaments (hyphae) of the fungi in a mutually beneficial symbiotic relationship. The fungi benefit from the carbohydrates produced by the algae or cyanobacteria via photosynthesis.

[#725] Nitrogen Fixation is carried out primarily by
Correct Answer

(D) Bacteria

Explanation

Solution: Nitrogen fixation is carried out naturally in soil by microorganisms termed diazotrophs that include bacteria such as Azotobacter and archaea. Some nitrogen-fixing bacteria have symbiotic relationships with plant groups, especially legumes.