A tissue is a group of cells that are

a) dissimilar in origin, form, and function.

b) similar in origin, but dissimilar in form and function.

c) dissimilar in origin but similar in form and function.

d) similar in origin, form, and function.

Question :                                                                                                                  [NDA]

Which one of the following glands produces insulin in the human body?

a) Pancreas

b) Liver

c) Spleen

d) Pituitary

Question :                                                                                                                       [BPSC (Pre) 1994]

Which is an atrocious animal?

a) Whale

b) Otter

c) Penguin

d) Tortoise


Cork is formed from

a) vascular cambium

b) phellogen

c) phloem

d) xylem


When oxygen is released as a result of photosynthesis, it is a by-product of which of the following?

a) The electron transfer system of the photosystem

b) Splitting the water molecules 

c) Chemiosmosis

d) None

(In the process of photosynthesis water is split(photolysis) to produce molecular oxygen.)

Question : 

Consider the following statements :

  1. A nerve is a bundle of axons of neurons.
  2. Collenchyma cells are dead and have irregular thickenings at the corners.
  3. Skin epithelium is called stratified squamous epithelium because it has one layer of cells.
  4. Tendons connect muscles to bones.

Which of these statement(s) is/are correct ?

a) 1 and 4

b) 3 only

c) 1 and 2

d) 1, 2, 3 and 4

Collenchyma cells are living, elongated, and irregularly thickened at the corners. Skin epithelium is called stratified squamous epithelium because its cells are arranged in many layers to prevent wear and tear.


Which among the following have scales?

  1. Amphibians
  2. Pisces
  3. Reptiles
  4. Mammals

Choose the correct option :

a) 2 and 3

b) 3 and 4

c) 1 and 3

d) 1 and 2

Answer: (a)

Amphibians can live in aquatic as well as terrestrial habitats. The Amphibian skin is moist (without scales). The skin of Mammals is unique in possessing hair.

Question :                                                                                                      [NDA]

A surge of which hormone stimulates ovulation in human females?

a) Estrogen

b) Luteinizing hormone

c) Follicle-stimulating hormone

d) Progesterone

Answer: (b)


Question :

allowing would not have an effect on the flowering of a particular plant species?

a) Nutritional status

b) Temperature

c) Plant age

d) Prevailing wind

Answer: (d)

Question :

Which among the following has an Open circulatory system?

  1. Arthropoda
  2. Mollusca
  3. Annelida
  4. Coelenterata

Choose the correct option :

a) 1 and 3

b) 3 and 4

c) 1 and 2

d) 2 and 4

Answer: (c)

Body fluids do not require specialized vessels, but flow openly in the body cavity.

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