Biology is the study of life and living things. It can be divided into different areas that look at the structure, function, anatomy, and behavior of organisms.
-
Question 21:

In the diagram, which of the animals represents the oldest creatures in terms of evolutionary history?
Options:
A) iii
B) ii
C) i
D) iv
Show Answer
The correct answer is D .
-
Question 22:

The function of the part labelled V is for the passage of
Options:
A) pollen tube and pollen nucleus
B) air, water and pollen nucleus
C) air, antipodal cells and ovum
D) synergids and egg cell
Show Answer
The correct answer is A .
-
Question 23:
Which of the following organs can be considered vestigial in humans but functional in other mammals
Options:
A) The liver
B) Appendix
C) Rectum
D) Stomach
Show Answer
The correct answer is B .
-
Question 24: which of the following is an agent of a sexually transmitted disease?
Options:
A) Entamoeba histolytica
B) Salmonella typhi
C) Treponema pallidum
D) Clostridium tetani
Show Answer
The correct answer is C .
-
Question 25: Proboscis is a structure that is mostly found in
Options:
A) insects
B) tapeworms
C) amphibians
D) molluses
Show Answer
The correct answer is A .
-
Question 26:
The development of big muscles by a wrestler is an example of?
Options:
A) acquired characteristics
B) inherited characteristics
C) mutation
D) atrophication
Show Answer
The correct answer is A .
-
Question 27: One of these is used for excretion in earthworm
Options:
A) Contractile vacuole
B) Flame cell
C) Malpighian tubule
D) Nephridium
Show Answer
The correct answer is D .
-
Question 28: Muscles are indirectly attached to bones by means of
Options:
A) ligaments
B) membranes
C) tendons
D) sutures
Show Answer
The correct answer is C .
-
Question 29: A fresh water plant such as water lily can solve the problem of buoyancy by the possession of
Options:
A) aerenchymarous tissues
B) dissected leaves
C) thin cell walls of the epidermis
D) water-repelling epidermis
Show Answer
The correct answer is A .
-
Question 30: The hormone which tones up the muscles of a person in time of danger is from the
Options:
A) thyroid gland
B) pancreas
C) adrenal gland
D) liver
E) spleen
Show Answer
The correct answer is C .