IGCSE Biology Paper-2: Specimen Questions with Answers 61 - 63 of 203

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Question 61

Question

MCQ▾

To protect the host from environmental agents such as microbes or chemicals, thereby preserving the integrity of the body. It is the function of-

Choices

Choice (4)

a.

Immune system

b.

Respiratory system

c.

Clotting

d.

Digestive system

Answer

a.

Explanation

The immune system is a system of many biological structures and methods within an entity that protects against disease.

Question 62

Question

MCQ▾

The heart beat/rate per minute in some mammal like human and cat is about?

Choices

Choice (4)

a.

Cat-140 - 220 bpm

Human- 60 - 100 bpm

b.

Cat-90 - 110 bpm

Human-40 - 60 bpm

c.

Cat-270 - 300 bpm

Human-110 - 130 bpm

d.

Cat-86 - 100 bpm

Human- 100 - 110 bpm

Answer

a.

Explanation

Heart beat or heart pulse is the speed of heartbeat, which is measured by number of contractions of the heart per unit of the time. The normal resting adult human heart rate ranges from 60 – 100 bpm and the normal heart rate for a healthy adult cat is between 140 and 220 beats per minute.

Question 63

Question

MCQ▾

Which statement is correct for Angiosperm?

Choices

Choice (4)

a.

Xylem tracheid

b.

Female gametophyte develops in ovaries of flower

c.

Female gametophyte develops in female cone

d.

None of the above

Answer

b.

Explanation

Angiosperms are seed-bearing vascular plants. Their reproductive structures are flowers in which female gametophyte develops in ovaries of flower.

Developed by: