In which of the following levels of classification are the members most similar?

A. Order

B. Genus

C. Species

D. Phylum

Spirogyra is regarded as a multicellular plant because

A. the cylindrical cells are linked end to end

B. its cells are linked together by cytoplasmic strands

C. its cells are large

D. it is an algae containing a large vacuole

Which of the following pairs of structures in living organisms do not perform similar functions?

A. Lungs and spiracles

B. Root hairs and mammalian hairs

C. Feathers and scales

D. Contractile vacuole and Kidneys

Which of the following sequences is the correct arrangement of tissues in the anatomy of a young dicotyledonous stem from the inside to the outside ?

A. pith , phloem, cambium, xylem, parenchyma, collenchyma and epidermis

B. Xylem, phloem, cambium, cortex, endodermis, collenchyma and epidermis

C. Pith,xylem, cmbium,phloem,, collenchyma, parenchyma and epidermis

D. phloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis

An animal which possesses scales nares and a backbone is likely to be a

A. toad

B. lizard

C. rat

D. bat

The opening of the guard cells of the epidermis in plants is by the process of

A. osmosis

B. diffusion

C. active transport

D. transpiration

What happens to a plant if the shoot tip is cut off and replaced by an agar block containing auxin? it will

A. stop growing

B. grow rapidly

C. continue to grow normally

D. die completely

Anaerobic respiration results in the production of

A. more energy than aerobic respiration

B. no energy

C. an equal amont of energy to aerobic respiration

D. less energy than aerobic respiration

Which of the following is not a skeletal tissue?

A. Plasma

B. Chitin

C. Cartilage

D. Bone

Which of the following statements is not correct about the mammalian heart?

A. Oxygenated blood enters the left auricle from the pilmonary vein

B. the walls of the ventricle are thicker than those of the auricle

C. blood passes from of blood into the right ventricle to the left auricle through the aorta

D. the tricuspid valve prevents the back flow of blood into the right auricle

Which of the following organs are used for gaseous exchange in a mature toad?

A. Gills, lungs and eardrum

B. Lungs, mouth and eardrum

C. Mouth, skin and gils

D. Skin, lungs and mouth