The streaming movement of cytoplasm observed in a freshly cut leaf of a water plant is termed

A. amoeboids

B. centrifugal motion

C. ciliary motion

D. cyclosis

E. osmosis

Which of the following sequences best illustrates a food chain in an aquatic habitat ?

A. algae → fungi → toad → snake

B. diatoms → tadpole → fish → kingfisher

C. grass → grasshopper → toad → whale

D. phytoplankton → fish → snake → kingfisher

E. zooplankton → tadpoles → fish → kingfisher

The process which ensures that the chromosome number for each species of organism remains constant from generation to generation is called

A. fission

B. fusion

C. meiosis

D. mitosis

E. oogenesis

Which of these pairs best illustrates symbiotic association?

A. dodder on green plants

B. ferns growing on palm trees

C. lice on hair of mammals

D. sea anemone attached to hermit crab

E. tick found on body of cow

Which statement about decomposers is NOT true?

A. They are saprophytes

B. They carry on intra-cellular digestion

C. They facilitate the cleansing of the environment

D. They facilitate the recycling of nutrients

E. They form a link between autotrophs and heterotrophs

Root pressure and the transpiration pull are biophysical processes which account for the?

A. ascent of water into leaves

B. exchange of gases at leaf surfaces

C. movement of manufactured food from leaves to storage tissues

D. opening and closing of stomata

E. Release of energy from glucose molecules

An organism existing at the colonial level of life is

A. chlamydomonas

B. euglena

C. paramecium

D. spirogyra

E. volvox

A common characteristic of ALL living things is

A. gametogenesis

B. hibernation

C. photosynthesis

D. phototropism

E. respiration

When a student suddenly runs into a snake on a pathway, which of these chemical messengers are released ?

A. adrenaline

B. insulin

C. oestrogen

D. testosterone

E. thyroxine