Biology - Study Mode

[#106] Which one of the following scientists first time saw bacteria through a microscope made by himself ?
Correct Answer

(A) Antonie Van Leeuwenhoek

Explanation

Solution: Antonie van Leeuwenhoek used single-lens microscopes, which he made, to make the first observations of bacteria and protozoa.

[#107] The unicellular algae used to supply and regulate the oxygen in space programmes is
Correct Answer

(B) Chlorella

Explanation

Solution: It is estimated that 2.3 kilograms of alga Chlorella pyrenoidosa produce enough oxygen to supply one man is space.

[#108] Amoeba moves in water with the help of locomotory organs called
Correct Answer

(C) Pseudopodia

Explanation

Solution: The locomotory organs of amoeba are called pseudopodia, which means 'fake feet'.

[#109] Bacteria are (were) considered more as plants than animals because of the presence of
Correct Answer

(C) Cell wall

Explanation

Solution: Both, plant cells and bacteria contain cell wall surrounding the cell membrane. Therefore, bacteria is said to be more like plant cell than animal cell.

[#110] Kelps are obtained from
Correct Answer

(B) Marine algae

Explanation

Solution: Kelps is obtained from marine brown algae.