biology MCQs – Page 59

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
1161. There are __________ types of nutrients needed by plants besides light to carry out photosynthesis
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A. Three

B. Five

C. Four

D. Two

1162. The opening and closing of stomata is directly controlled by the___________?
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A. Temperature

B. pH

C. None of these

D. Light
1163. Most of the marine invertebrates are__________?
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A. Osmoconformers

B. Osmoregulators

C. Both depend upon the concentration of sea water

D. None of these

1164. Which of the following animal excrete nitrogenous waste mainly as uric acid?
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A. Planaria.

B. Birds.

C. Hydra

D. Humans

1165. Release of the ovum from ovary is called__________?
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A. ovulation

B. implantation

C. none of these

D. fertilization

1166. Which of the following statement about conifers is correct?
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A. Production of black wood in the center.

B. Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.

C. Accumulate waste in leaves, which fall in autumn.

D. Stored excretory products in vacuoles, at a concentration that leads to crystal formation.

1167. In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________?
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A. Endodermis

B. Chitin

C. Mesophyll

D. Epidermis
1168. The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)
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A. Active transport

B. Osmosis

C. None of these

D. Deffusion

1169. Which of the following structure in plants body is called excretophores?
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A. Stem

B. Flowers

C. Leaves

D. Roots

1170. Amoeba secretes digestive enzymes to hydrolyse _________ ?
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A. Sugar

B. Proteins

C. All of these and fats

D. Starch

1171. All plants do not possess___________?
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A. Stomata

B. Lenticels

C. Cuticle

D. All of these

1172. Which of the following is a sentimentally arranged excretory system?
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A. Metanephridium

B. Malpighian tubules

C. Nephrons

D. Protonephridium

1173. It is the measure of force with which blood pushes up against the walls of blood vessels.
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A. Stroke volume

B. Blood flow

C. Blood pressure

D. Cardiac output

1174. The life and activities of a cell is controlled by__________?
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A. nucleus

B. mitochondria

C. cytoplasm

D. vacuole

1175. Each ach nephridium of earthworm opens to the exterior by__________?
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A. Nephridiopore

B. Anus

C. Flame cell

D. Nephrostome

1176. There are _________ hypothesis which may explain opening and closing of stomata?
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A. Two

B. Four

C. Three

D. One

1177. How many vertebrae are in sacrum?
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A. 5

B. 12

C. 4

D. 7

1178. Shrinkage of protoplast due to exosmosis of water is__________?
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A. plasmolysis

B. adhesion

C. imbibition

D. deplasmolysis

1179. In plants there are_______basic types of tissues?
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A. 3

B. 4

C. 2

D. None of these

1180. Aquatic animals excrete nitrogenous waste commonly in the form of_____________?
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A. Trimethylamine oxide

B. Uric acid

C. Urea

D. Ammonia