🚨Plant responses and seed growth 🌱

Question 1

Explain Homeostasis

Answer 1

Maintaining a constant internal environment

Question 2

Two anatomical ways plants can protect themselves

Answer 2

Thorns, cuticle

Question 3

Two chemical ways plants can protect themselves

Answer 3

Heat shock proteins, stress proteins

Question 4

Explain germination

Answer 4

Growth of seed into a plant

Question 5

Explain dispersal

Answer 5

Carrying of a seed away from the parent plant

Question 6

Dormancy

Answer 6

Period of no growth or no metabolism

Question 7

Outline how dormancy in seeds benefit plant species

Answer 7

Allows time for greater dispersal

Question 8

Two roles of water in the process of germination

Answer 8

Transport nutrients, activate metabolism

Question 9

Two possible food stores in seeds

Answer 9

Endosperm, cotyledon (seed leaf)

Question 10

What is a tropism

Answer 10

Growth response to a stimulus

Question 11

Where are auxins produced

Answer 11

Meristem, root tip

Question 12

Precise benefit to the plant that the shoot is positively phototrophic

Answer 12

More photosynthesis

Question 13

Two uses of growth regulators in agriculture or horticulture

Answer 13

Micropropagation, rooting powder

Question 14

Two reasons why the action of an auxin is considered to be similar to the action of a hormone in the human body

Answer 14

Chemical action, widespread effect

Question 15

What is an auxin

Answer 15

A plant growth regulator

Question 16

State two inhibitory functions of auxins

Answer 16

Slows mitosis, prevents growth in side branches

Question 17

How does digestion contribute to successful seed germination

Answer 17

To make nutrients available, to make nutrients more easily absorbed

Question 18

Name given to region of plants which secrete growth regulators

Answer 18

Meristems

Question 19

Give an example of a growth regulator which has a negative effect on plant growth

Answer 19

IAA

Question 20

Explain thigmotropism

Answer 20

Growth response of a plant to touch

Question 21

Two reasons dispersal in important to plants

Answer 21

Reduces competition, ensures better survival rate

Question 22

Following fertilisation, from precisely which part of the flower is the seed formed

Question 23

Explain term monocotyledonous

Answer 23

Plants whos seeds have only one cotyledon

Question 24

Two bio molecules stores
in endosperm or cotyledon tissue

Answer 24

Lipids, carbohydrates

Question 25

two ways knowledge of seed dormancy has been useful to humans

Answer 25

Maximise growing season, optimum sowing time

Question 26

Which part of seed where food for germination is stored

Answer 26

Cotyledon, endosperm

Question 27

Three factors necessary for seeds to germinate

Answer 27

Water, oxygen, suitable temperatures

Question 28

Role of respiration in seed germination

Answer 28

Provides energy for growth

Question 29

Name term for type of asexual reproduction that produces a daughter plant

Answer 29

Vegetative propagation

Question 30

Is the daughter plant of a plant that underwent vegetative propagation haploid or diploid. Why?

Answer 30

Diploid, Product of mitosis

Question 31

Give two method, other than runner, and not involving seeds, that is used by horticulturist to produce new plant

Answer 31

Micropropagation, Tissue culture

Question 32

Two ways growth regulators in plants are similar to hormones in animals

Answer 32

Chemical nature, Made in one site and functions at another

Question 33

Plant regulator that promotes growth and precise location for a site of its action

Answer 33

IAA, Meristem

Question 34

Which part of stem are growth promoters transported

Answer 34

Vascular tissue

Question 35

Explain term “adverse external environment”

Answer 35

Surroundings that are harmful to organisms

Question 36

2011 Q 11