variation core questions

Question 1

what are some of the possible causes of variation between living things

Answer 1

differences in the genome
differences in the environment

Question 2

what is discontinuous variation

Answer 2

this is where the differences fit into one category or another e.g. blue eyes or green eyes

Question 3

what is continuous variation

Answer 3

this is where the differences can have a range of values e.g. height

Question 4

what is variation

Answer 4

differences in characteristics between living things

Question 5

state the function of the nucleus of a cell

Answer 5

contains DNA and controls the function of the cell

Question 6

state the function of the ribosome of a cell

Answer 6

where protein synthesis occurs (where proteins are made)

Question 7

what is the name of the male sex cell

Answer 7

sperm cell

Question 8

what is the name of the female sex cell

Answer 8

ovum (egg cell)

Question 9

state two adaptations of ovum cells

Answer 9

contains half of the DNA
lots of cytoplasm

Question 10

state three adaptations of sperm cells

Answer 10

tail
contains half of the DNA
lots of mitochondria

Question 11

state the function of ovum cells

Answer 11

carry female genetic information

Question 12

state the function of sperm cells

Answer 12

carry male genetic information

Question 13

reorder the following in increasing size order:
organ
cell
tissue
organ system
organism
organelle

Answer 13

organelle
cell
tissue
organ
organ system
organism

Question 14

define gamete

Answer 14

sex cells

Question 15

define fertilisation

Answer 15

nucleus of male and female sex cell joining

Question 16

state three things that plants compete with each other for

Answer 16

light
space
water and mineral ions

Question 17

where is the genetic material found in a cell

Answer 17

the nucleus

Question 18

state three things animals compete with each other for

Answer 18

mates
territory
food

Question 19

is this statement true or false

harry inherited half of his genome from his mum and half from his dad

Answer 19

true

Question 20

how many chromosomes are there in sperm and egg cells

Answer 20

23

Question 21

how many chromosomes are there in human body cells

Answer 21

46

Question 22

which chemical makes up the genetic material in a cell

Answer 22

DNA

Question 23

is DNA alive

Answer 23

no

Question 24

what is the shape of a DNA molecule

Answer 24

double helix

Question 25

name a scientist who was involved with the discovery of the structure of DNA

Answer 25

Rosalind Franklin
Fancis Crick
James Watson
Maurice Wilkins

Question 26

state three things organisms depend on each other for

Answer 26

food
shelter
pollination