A pair of genes which controls a trait is described as

A. allele

B. dominant

C. hybrid

D. recessive

E. variant

In genetics, test cross is used to

A. confirm the number of offspring in F1

B. confirm the number of gametes present in parents

C. test for heterozygosity

D. test for X and Y chromosomes

E. test for the phenotypic ratio

What is NOT characteristic of fresh water habitats?

A. high osmotic concentration

B. low oxygen concentration

C. they are flooded during the rainy season

D. temperature changes daily

E. they have limited size-and depth

Which division is NOT part of the atmosphere?

A. hydrosphere

B. mesosphere

C. stratosphere

D. thermosphere

E. troposphere

A group of interacting populations in a particular habitat can be described as

A. biome

B. biosphere

C. community

D. ecosystem

E. environment

Iron is mainly required by plants for_________formation.

A. Chlorophyll

B. glucose

C. protein

D. nuclear

E. nucleproteins

Which reagent is used to test for the presence of starch in a food substance?

A. anhydrous copper (II) sulphate

B. Fehling’s solution

C. iodine solution

D. iron(III) oxide

E. Million’s reagent

The incomplete breakdown of glucose into alcohol, carbon dioxide and energy is referred to as

A. decay

B. digestion

C. fermentation

D. oxidation

E. respiration

Which organism is a primary producer?

A. Cassava

B. cricket

C. grasshopper

D. hawk

E. lizard