Plants prac MCQ

False

Carnivorous lants tend to be found in nutrient-rich habitats

True

Deforestation can potentially alter climate by changing surface albedo

False

Sulphur dioxide remains the dominant air pollutant affecting vegetation across Europe

False - essential for both

Selenium is an essential element for plants but not animals

True

Krantz anatomy is not essential for C4 photosynthesis

True

A pioneer plant species in one that can colonize bare rock

True

As a forest ecosystem ages, the stomatal conductance and photosynthetic rate of the tree species tends to decrease

True

High silica content can protect grasses from mammalian herbivory

True

There is evidence to suggest that terpenes released from coniferous trees in warm weather act as a natural form of cloud seeding, which can affect climate

True

A reduction in transpiration surface helps plants adapt to arid conditions

False

The plant cuticle is freely permeable to both water and CO2

True

Plants in the tundra can maximize their photosynthetic rate by reducing their low temperature optima

False

The state of stability found at the end of a secondary succession is called a climax community

True

In the middle of the 19th century, most carbon dioxide emissions could be attributed to non-tropical deforestation

True

PEP carboxylase plays a crucial part in C4 photosynthesis

False - also in peroxisomes

Photorespiration takes place only in the mitochondrion

True

Under elevated carbon dioxide concentrations, stomatal opening is reduced, resulting in higher leaf temperatures

False - because of conversion to agriculture

Global forest cover has decreased over the last 40 years due to an increase in atmospheric carbon dioxide concentrations

True

Silvo-pasture is integrating trees on grazing land for livestock

False - combat against UV light

Antioxidants are produced by plants at high altitudes to combat the effects of lower carbon dioxide concentrations

Willow

Aspirin is derived from the bark of which tree?

• Yew

• Willow

• Beech

Stinging Nettle

Which of the following species has the highest nitrogen requirement?

• Heather

• Stinging Nettle

• White Clover

Carbon monoxide

Which of the following gases in NOT a greenhouse gas?

• Ground-level ozone

• Methane

• Carbon monoxide

Upper surface

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

• upper surface

• lower surface

• equally on the lower and upper surfaces

Drosera

Which of the following plant genera has ‘sticky surface’ traps

• heliamphora

• utricularia

• Drosera

Dwarf scrubs

Boreal vegetation is typically composed of:

• coniferous trees

• deciduous trees

• Dwarf scrubs

Arctic Tundra

Cup-shaped, parabolic reflecting flowers are characteristic of which environment?

• Rainforest

• Hot desert

• Arctic tundra

It keeps the leaves cool

Evapotranspiration is important to plant survival because…

• It makes leaves reflective

• It disseminates the products of photosynthesis around the plant

• It keeps the leaves cool

low humidity

Which of the following environmental condition tends to result in stomatal closure?

• low humidity

• low carbon dioxide concentration

• high light intensity

A complex canopy structure

A rainforest canopy has a high species diversity of mammals, birds, and invertebrates mainly because of…

• high annual temperatures

• high annual humidity

• a complex canopy structure

Constituent of chlorophyll

Which of the following is NOT a major function of Calcium?

• constituent of cytoskeleton

• constituent of chlorophyll

• second messenger

Light

In spring, the growth of woodland plants such as Red Campion or Bluebell is predominantly limited by:

• light

• water

• nutrients

Pampas

Which of the following grassland biomes is only found in southern latitudes?

• steppe

• prairie

• pampas

Timing of biological events

Phenology is the study of…

• leaf morphology

• timing of biological events

• root growth

Spatially separated

The two carboxylation processes in C4 plants are…

• temporarily separated

• spatially separated

• external to the chloroplast

Ephermal (short-lived) leaves

Which of the following traits is most likely to be found in desert plants?

• ephermal (short-lived) leaves

• large leaves

• carnivory

Green light

Which of the following are least effective in photosynthesis?

• blue light

• red light

• green light

Potassium and Phosphorus

Which of the elemental cycle of Carbon, Phosphorus, Sulphur, and Potassium do NOT have an atmospheric component?

• Potassium and Sulphur

• Potassium and Phosphorus

• Carbon and Phosphorus

Increasing starch content and decreasing N and protein content

In many important food crops, elevated carbon dioxide levels can change above-ground tissue quality by:

• increasing starch content and decreasing N and protein content

• Decreasing starch content and decreasing N and protein content

• Increasing N allocation to roots

Chlorophyll

Magnesium is an essential component of:

• carbonic anhydrase

• chlorophyll

• urease

a plant can produce biochemicals that affect the growth of adjacent plants

Allelopathy is a process in which…

• a plant can biochemically acquire nutrients from adjacent plants

• a plant can share biochemical resources from adjacent plants of the same family

• a plant can produce biochemicals that affect the growth of adjacent plants

They may contain species that are not present in the adjacent biome(s)

The boundary between adjacent biomes is called an Ecotone. These are important for biodiversity because…

• they act as a barrier to protect the biodiversity in a biome

• they may contain species that are not present in the adjacent biome(s)

• they can prevent one biome from enroaching one another

The plant provides carbohydrate and the fungus provides Phosphorus

A mycorrhizal association is beneficial to both the fungal and plant partner because…

• the plant provides carbohydrate, and the fungus provides water and oxygen

• the plant provides carbohydrate and the fungus provides Phosphorus

• The plant provides Phosphorus and the fungus provides carbohydrate

movement of water from soil to atmosphere by evapotranspiration

Afforestation can have a very powerful effect in catchment soils due to…

• rainfall interception and evaporation within the canopy

• excessive water uptake and storage by tree species

• movement of water from soil to atmosphere by evapotranspiration

tannins

Which of the following secondary photosynthates can inhibit digestion of proteins by herbivores?

• tannins

• cyanides

• alkaloids

facultative parasite

Which term is used to describe plants such as Hay-Rattle (Rhinanthus minor) which can complete their life-cycle independent of a host plant?

• obligate parasite

• holoparasite

• facultative parasite

promote seed germination

A common function of ethylene is to…

• delay senescence

• prime RuBisCO

• promote seed germination

conserving biodiversity

A corrider linking remnant forest patches is generally thought to be useful for:

• conserving biodiversity

• maintaining tree productivity

• ease of logging activity

a dramatic reduction in precipitation from south to north

A north-south transect across the Sahel in Africa, demonstrates a biome shift from Tropical Rainforest through Savanna to Hot Desert as a result of…

• a dramatic reduction in precipitation from south to north

• overgrazing and land use due to population pressure

• combination of higher temperatures and prevailing wind

larger areas of the sub-tropics will experience temperatures above the minimum germination and growth temperature of the plant

The range of invasive parasitic crop weed Striga hermenthica (Purple Witchweed) is predicted to increase in the sub-tropics as a result of environmental change because. . .

• changing rainfall patterns encourage germination in dormant seeds

• larger areas of the sub-tropics will experience temperatures above the minimum germination and growth temperature of the plant

• elevated carbon dioxide concentrations will disadvantage the host plants