Plant Biology Quiz

Question 1

What is the word equation for photosynthesis?

Accepted Answer

Carbon dioxide + water → glucose + oxygen

Answer

Glucose + oxygen → carbon dioxide + water

Answer

Sunlight + water → glucose + carbon dioxide

Answer

Glucose + water → oxygen + carbon dioxide

Question 2

What is chlorophyll and where is it found?

Accepted Answer

A green pigment in chloroplasts that absorbs light for photosynthesis

Answer

A sugar stored in roots

Answer

A protein in the cell wall

Answer

A hormone that controls flowering

Question 3

What are the three main organs of a flowering plant?

Accepted Answer

Root, stem, and leaf

Answer

Leaf, bark, and fruit

Answer

Flower, seed, and soil

Answer

Petal, sepal, and pollen

Question 4

What are stomata and what do they do?

Accepted Answer

Tiny pores (mainly on the underside of leaves) that allow gas exchange and water vapour to pass in and out

Answer

Root hairs that absorb water

Answer

Cells that store starch in leaves

Answer

Structures that carry water up the stem

Question 5

What is the function of xylem in plants?

Accepted Answer

Transporting water and dissolved minerals from roots to the rest of the plant

Answer

Transporting sugars from leaves to the rest of the plant

Answer

Storing glucose in the stem

Answer

Producing hormones for growth

Question 6

What does phloem transport?

Accepted Answer

Dissolved sugars (mainly sucrose) from leaves to the rest of the plant

Answer

Water from roots to leaves

Answer

Carbon dioxide to leaves

Answer

Mineral ions only

Question 7

What is transpiration?

Accepted Answer

The loss of water vapour from a plant, mainly through the stomata

Answer

The transport of food through the phloem

Answer

The absorption of CO₂ by leaves

Answer

The process of a plant making seeds

Question 8

What is pollination?

Accepted Answer

The transfer of pollen from anther to stigma

Answer

The germination of a seed

Answer

The fertilisation of an egg cell by a sperm cell in plants

Answer

The production of nectar by flowers

Question 9

What are the main differences between wind-pollinated and insect-pollinated flowers?

Accepted Answer

Insect-pollinated flowers tend to be brightly coloured with nectar; wind-pollinated flowers are small and dull with feathery stigmas

Answer

Wind-pollinated flowers are always larger and more colourful

Answer

Wind-pollinated flowers smell strongly; insect-pollinated ones have no scent

Answer

There is no structural difference between them

Question 10

What is phototropism?

Accepted Answer

A plant growing toward or away from light

Answer

A plant growing toward gravity

Answer

A plant producing flowers in response to day length

Answer

A plant's roots absorbing water

Question 11

What plant hormone controls elongation of cells and is involved in tropisms?

Accepted Answer

Auxin

Answer

Insulin

Answer

Adrenaline

Answer

Gibberellin

Question 12

What are the conditions needed for seed germination?

Accepted Answer

Water, warmth (suitable temperature), and oxygen

Answer

Sunlight, water, and wind

Answer

Soil, light, and carbon dioxide

Answer

Fertiliser, water, and darkness

Question 13

What is the function of the root hair cells?

Accepted Answer

To increase the surface area for absorbing water and mineral ions from the soil

Answer

To anchor the plant only

Answer

To store starch for the plant

Answer

To absorb carbon dioxide from the soil

Question 14

What limiting factors affect the rate of photosynthesis?

Accepted Answer

Light intensity, CO₂ concentration, and temperature

Answer

Only temperature

Answer

Oxygen concentration and water only

Answer

Mineral content of the soil only

Question 15

What is the role of flowers in plant reproduction?

Accepted Answer

To attract pollinators and house the reproductive organs for sexual reproduction

Answer

To carry out photosynthesis

Answer

To absorb water and minerals

Answer

To store food for the plant

Question 16

What is vegetative propagation?

Accepted Answer

Asexual reproduction in plants using vegetative parts such as roots, stems, or leaves

Answer

Reproduction involving flowers and pollen

Answer

The growth of new leaves in spring

Answer

A method of pollination using insects

Question 17

What is the function of the waxy cuticle on a leaf?

Accepted Answer

Reducing water loss by evaporation from the leaf surface

Answer

Absorbing sunlight for photosynthesis

Answer

Allowing gas exchange between the leaf and the air

Answer

Transporting water through the leaf

Question 18

What mineral is essential for plants to make chlorophyll?

Accepted Answer

Magnesium

Answer

Phosphorus

Answer

Potassium

Answer

Calcium

Question 19

What type of reproduction do spores represent in ferns and mosses?

Accepted Answer

Asexual reproduction not requiring fertilisation

Answer

Sexual reproduction using gametes

Answer

Vegetative reproduction from runners

Answer

Pollination by wind

Question 20

What do plants use glucose for after photosynthesis?

Accepted Answer

Respiration for energy, building cellulose for cell walls, making amino acids, and storing as starch

Answer

Breathing only

Answer

Converting directly into oxygen

Answer

Producing carbon dioxide