The micro-organisms that causes Typhoid disease is

A. trypanosome gambiense

B. Salmonella typhi

C. entamoeba histolytica

D. plasmodium sp

A collection of population of all living organisms that exist in a habitat is referred to as

A. niche

B. ecosystem

C. community

D. environment

The theory of use and disuse of organs was promulgated by

A. Alfred Wallace

B. Charles Darwin

C. Jean Lamarck

D. Robert Hook

The theory of natural selection was postulated by

A. Gregor Mendel

B. Matthias Schleiden

C. Charles Darwin

D. Robert Hook

The movement response of a cockroach away from a light source is

A. negative phototaxism

B. positive phototaxism

C. negative phototropism

D. postive phototropism

Which of the following can cause shrinkage of living cells?

A. Deionized water

B. Hypotonic solution

C. Isotonic solution

D. Hypertonic solution

The ability of chameleon to change its colour rapidly is an adaptation for

A. obtaining food

B. attraction mate

C. communication

D. escaping detection

The function of the red head in male Agama lizards is to

A. scare other males from the territory

B. warn predators of the distastefulness of the animal

C. attract female lizards for mating purposes

D. conceal and camouflage the animal from predators

The activity of ptyalin is likely to decrease with an increase in the concentration of

A. oxygen

B. starch

C. protein

D. acid

Seed plants are divided into

A. monocoty ledons and dicotyledons

B. tracheophytes and ferns

C. angiosperms and gymnosperms

D. thallophytes and bryophytes