The mouth parts of the housefly are adapted for

A. Lapping and sponging

B. Sucking and chewing

C. Piercing and sucking

D. Chewing and lapping

E. Biting and chewing

The male toad differs from the female by having

A. Vocal sacs

B. Shorter hind limbs

C. Longer fore limbs

D. Bulging eyes

E. Nictating membranes

Mosses, liverworts and ferns can be grouped together because they

A. Are all aquatic plants

B. All grow in deserts

C. Are seedless plants

D. Have undifferentiated plant bodies

E. All produce colourless flowers

Spirogyra and mucor can be grouped together as Thallophyta because

A. They are unicellular organisms

B. Their spores could be dispersed by wind

C. They are capable of living independent lives

D. They reproduce sexually only

E. Their bodies are made up of thallus and filaments alternatively

Which of the following invertebrates does NOT possess antennae?

A. Centipede

B. Crustacean

C. Millipede

D. Insect

E. Spider

Which of the following is INCORRECT? The prothallus of a fern

A. Is flattened heart-shaped structure

B. Is green because its cells contain chloroplasts

C. Is the dominant plant

D. Bears the sexual organ

E. Is attached to the ground by numerous rizoids

Which of the following cell constituents is NOT common in both plants and animals?

A. Mitochondria

B. Chloroplast

C. Ribosomes

D. Golgi apparatus

E. Vacuoles

The character-producing factors in living organisms are

A. Chromomeres

B. Alleles

C. Chromatids

D. Chromosomes

E. Genes

A mixture of mercurous and mercuric nitrates is added to a food substance. A white precipitates is formed which on gentle heating turns red. The food substance is

A. Protein

B. Oil

C. Carbohydrates

D. Fat

E. Fatty acid

The mammalian organ through which nourishment and oxygen diffuse into a developing embryo is called

A. Amnion

B. Chorion

C. Umbilical cord

D. Oviduct

E. Placenta