Reproduction

Question 1

<p>Define Asexual reproduction</p>

Answer 1

<p>A process resulting in the production of genetically identical offspring from one parent</p>

Question 2

<p>Advantages of asexuall reproduction</p>

Answer 2

<p>Population can be increased rapidly
Can exploit suitable environments quickly
Time and energy efficient
Reproduction is completed much faster than sexual reproduction</p>

Question 3

<p>Disadvantages of asexual reproduction</p>

Answer 3

<p>limited genetic variation in population
population is vulnerable to changes in conditions and may only be suited for one habitat
Disease is likely to affect the whole population as there is no genetic variation</p>

Question 4

<p>Why is axexual reproduction is crop plants prefered</p>

Answer 4

<p>As it means that a plant that has good characteristics can be made to reproduce asexually and the entire crop will show the same characteristics</p>

Question 5

<p>Define Sexual reproduction</p>

Answer 5

<p>A process involving the fusion of the nuclei of two gametes to form a zygote and the production of offspring that are genetically different from each other</p>

Question 6

<p>What are the nuclei of the gametes?</p>

Answer 6

<p>Haploid</p>

Question 7

<p>What is the nucleus of a zygote?</p>

Answer 7

<p>Diploid</p>

Question 8

<p>What are advantages of sexual reproduction</p>

Answer 8

<p>Increases genetic variation
Species can adapt to new environment due to
variation
Disease is less likely to affect population due to variation</p>

Question 9

<p>What are the disadvantages of sexual reproduction?</p>

Answer 9

<p>Takes time and energy to find males

| Difficult for isolated members of the species to reproduce</p>

Question 10

Define Fertilisation

Answer 10

<p>The fusion of gamete nuclei</p>

Question 11

sepals?

Answer 11

Protects unopened flower

Question 12

petals?

Answer 12

Brightly coloured to attract insects

Question 13

anther

Answer 13

produces and releases the male sex cell

Question 14

stigma

Answer 14

top of the female part that collects pollen grains

Question 15

ovaries

Answer 15

produces the female sex cell

Question 16

ovule

Answer 16

contains the female sex cell

Question 17

insect pollinated petals

Answer 17

large and brightly coloured to attract insects

Question 18

insect pollinated scent and nectar

Answer 18

entices insects to visit the flower and push past stamen to get to nectar

Question 19

insect pollinated pollen grains

Answer 19

large sticky spiky to attach to insects

Question 20

insect pollinated anthers

Answer 20

inside flower stiff to brush against insects

Question 21

insect pollinated stigma

Answer 21

inside flower sticky so pollen grains stick to it when an insect brushes past

Question 22

wind pollinated petals

Answer 22

small, dull

Question 23

wind pollinated scent and nectar

Answer 23

no need to waste energy producing those

Question 24

wind pollinated pollen grains

Answer 24

Large amounts most pollen are not transferred to another flower.

Question 25

wind pollinated anthers

Answer 25

outside flower swinging loose on long filaments to release pollen grains easily

Question 26

wind pollinated stigmas

Answer 26

Outside to catch drifting pollen grains