NECO Biology Past Questions & Answers - Page 69

341.

Which division is NOT part of the atmosphere?

A.

hydrosphere

B.

mesosphere

C.

stratosphere

D.

thermosphere

E.

troposphere

Correct answer is A

part of the atmosphere includes: the troposphere, stratosphere, mesosphere and thermosphere

342.

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

Correct answer is A

No explanation has been provided for this answer.

343.

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

Correct answer is C

No explanation has been provided for this answer.

344.

A pair of genes which controls a trait is described as

A.

allele

B.

dominant

C.

hybrid

D.

recessive

E.

variant

Correct answer is A

Alleles are pairs or series of genes on a chromosome that determine the hereditary characteristics.

345.

Which is NOT a social animal?

A.

Ant

B.

Bee

C.

Butterfly

D.

Termite

E.

Wolf

Correct answer is C

Social insects work together to find food and other resources and to communicate their findings to others in the community. They are capable of providing defense to their home and resources when under attack. Social insects also can displace other insects, and even larger animals, for territory and food.

-Social insects are the ants, bees, wasps, and termites that have organized societies.

-Butterflies are mostly solitary creatures, though some species migrate in massive numbers.

-Wolves are very social animals. They live and hunt together in groups called packs. A wolf pack is really just another name for a family of wolves