General Science

In general science, stigma refers to:

A plant hormone promoting stem elongation and influencing germination
B surface receptive to pollen
C organism producing organic matter, usually using light or chemical energy
D growth response to water

What is the best description of tropism?

A directional plant growth response to an external stimulus
B growth response to light direction
C plant flowering when day length is below a critical value
D nitrogen-fixing bacteria associated with legume root nodules

What is the best description of cross-pollination?

A pollen transfer between genetically different plants of same species
B growth response to touch
C organism breaking down dead organic matter
D capacity of a plant cell to regenerate into a whole plant under suitable conditions

What is the best description of carpel/pistil?

A female reproductive structure
B pollen transfer between genetically different plants of same species
C stalk supporting the anther
D cohesion-tension contribution to upward xylem water movement

Which statement correctly identifies auxin?

A mature ovule containing an embryo
B plant hormone associated with cell elongation and tropisms
C meristem contributing to secondary growth in girth
D nitrogen-fixing bacteria associated with legume root nodules

What is the best description of seed dispersal?

A movement of seeds away from parent plant
B capacity of a plant cell to regenerate into a whole plant under suitable conditions
C growth response to water
D organism producing organic matter, usually using light or chemical energy

In general science, hydrotropism refers to:

A growth response to water
B mature ovule containing an embryo
C floral part often attracting pollinators
D flower structure containing ovules

In general science, cross-pollination refers to:

A transfer of pollen from anther to stigma
B plant organ mainly anchoring and absorbing water/minerals
C pollen transfer between genetically different plants of same species
D part of stamen producing pollen

In general science, tropism refers to:

A cells regulating stomatal opening
B directional plant growth response to an external stimulus
C asexual reproduction from vegetative plant parts
D part protecting the developing flower bud

Which of the following is most closely associated with totipotency?

A meristem contributing to secondary growth in girth
B capacity of a plant cell to regenerate into a whole plant under suitable conditions
C directional plant growth response to an external stimulus
D nitrogen-fixing bacteria associated with legume root nodules

In general science, style refers to:

A plant flowering when day length is below a critical value
B movement of seeds away from parent plant
C growth response to light direction
D structure connecting stigma to ovary

What is the best description of gibberellin?

A differentiated tissue generally no longer actively dividing
B plant hormone promoting stem elongation and influencing germination
C structure developing into a seed after fertilisation
D mature ovary, often with accessory tissues

Which statement correctly identifies carpel/pistil?

A differentiated tissue generally no longer actively dividing
B structures housing symbiotic nitrogen-fixing bacteria
C mature ovary, often with accessory tissues
D female reproductive structure

Which of the following is most closely associated with photoperiodism?

A organism breaking down dead organic matter
B plant hormone promoting stem elongation and influencing germination
C growth response to water
D plant response to relative duration of light and dark

Which statement correctly identifies ovary?

A plant flowering when day length exceeds a critical value
B flower structure containing ovules
C growth response to gravity
D plant hormone associated with cell elongation and tropisms

Which of the following is most closely associated with short-day plant?

A plant flowering when day length exceeds a critical value
B asexual reproduction from vegetative plant parts
C plant flowering when day length is below a critical value
D growth response to light direction

Which statement correctly identifies phloem?

A plant hormone associated with cell elongation and tropisms
B vascular tissue transporting sugars and other organic assimilates
C growth response to gravity
D plant flowering when day length exceeds a critical value

Which of the following is most closely associated with self-pollination?

A resumption of embryo growth into a seedling
B male reproductive part of a flower
C pollination involving the same plant in the relevant case
D structure developing into a seed after fertilisation

In general science, self-pollination refers to:

A organelle where photosynthesis occurs
B female reproductive structure
C major organ for photosynthesis and gas exchange
D pollination involving the same plant in the relevant case

Which statement correctly identifies stigma?

A conversion of atmospheric nitrogen into biologically usable forms
B surface receptive to pollen
C plant hormone associated with stomatal closure and stress responses
D meristem at root/shoot tips causing primary growth

Which statement correctly identifies guard cells?

A cells regulating stomatal opening
B conversion of atmospheric nitrogen into biologically usable forms
C plant hormone associated with stomatal closure and stress responses
D meristem at root/shoot tips causing primary growth

In general science, thigmotropism refers to:

A surface receptive to pollen
B growth response to touch
C fusion of male and female gametes
D actively dividing plant tissue responsible for growth

In general science, biodiversity refers to:

A female reproductive structure
B organelle where photosynthesis occurs
C variety of life at genetic, species and ecosystem levels
D major organ for photosynthesis and gas exchange

What is the best description of stomata?

A cohesion-tension contribution to upward xylem water movement
B pollen transfer between genetically different plants of same species
C microscopic pores regulating leaf gas exchange and transpiration
D female reproductive structure

In general science, petal refers to:

A floral part often attracting pollinators
B angiosperm process involving syngamy and triple fusion
C meristem at root/shoot tips causing primary growth
D structure connecting stigma to ovary