Plant biology

1.

1 point

Which of the following is usually considered to be a micronutrient?

Sulphur

Potassium

manganese

2.

1 point

Which of the following genera of carnivorous plants has ‘sticky surface’ traps?

Drosera

Heliamphora

Utricularia

3.

1 point

Physical water scarcity rather than economic water scarcity is a major constraint for plant productivity in central Africa

True

False

4.

1 point

Which of these traits is a general characteristic of living vascular plants?

Uptake of water by the capillary action of leaves

Differentiated vascular tissues (xylem and phloem)

Life cycle with dominant gametophyte

5.

1 point

Which of these cell types is a constituent of the phloem?

Fibres

Tracheids

companion cells

6.

1 point

Which of the following is a function of the transpiration stream?

Transport of sugars

Transport of amino acids

Transport of nutrients

7.

1 point

Plant cell expansion is driven by an increase in turgor.

True

False

8.

1 point

In legumes, the first site of root infection by Rhizobium is the:

root cortex

root cap

root hair

9.

1 point

In general, perennial species allocate more resources to reproduction than annual species

True

False

10.

1 point

Chloroplasts are located in both the palisade AND spongy mesophyll cells of leaves

True

False

11.

1 point

Stomata open because K+ ions are activley transported out of the guard cell

True

False

12.

1 point

Which of the following plant types are bryophytes?

Liverworts

Club mosses

Horsetails

13.

1 point

Oligotrophic lakes show limited plant productivity

True

False

14.

1 point

Tropical rain forest trees generally have deep roots for support and to capture nutrients that are leached downwards by the high rainfall

True

False

15.

1 point

Which of the following traits is NOT likely to be found in desert plants?

succulence

carnivory

Ephemeral (short-lived) flowers

16.

1 point

During the mid-day depression of photosynthesis, stomata close to prevent:

Photorespiration

water stress

Leaf warming

17.

1 point

The doubling in cereal yield that was achieved from 1960 to 2000 can be attributed solely to genetic improvement.

True

False

18.

1 point

Which term is used to describe Striga (witchweed) which, although possessing chlorophyll, cannot complete its life cycle without a host:

Obligate parasite

Holoparasite

Facultative parasite

19.

1 point

In CAM plants, stomata close during the day in response to what internal signal?

Increased temperature

Increasing CO2

Decreasing CO2

20.

1 point

In the leaves of floating aquatic plants, stomata are generally found on the:

upper and lower surfaces

Lower surface

Upper surface

21.

1 point

Which of the following was a feature of the earliest land plants?

no cuticle

Stomata

Desiccation-resistant seeds