B5

HideShow resource information
  • Created by: zoe
  • Created on: 14-01-14 15:44
What two processes to cells divide by?
mitosis and meiosis
1 of 40
What do similar cells form?
tissue
2 of 40
What do groups of tissue form?
organ
3 of 40
What is the division of body cells to produce new cells called?
mitosis
4 of 40
What does mitosis occur for?
growth, repair and to replace new tissues
5 of 40
What only takes place in the testes and ovaries?
meiosis
6 of 40
What does meiosis produce?
gametes
7 of 40
During fertilisation the male and female gametes fuse together to make what?
a zygote
8 of 40
What is the cluster of cells called that is made when the zygote divides by mitosis?
an embryo
9 of 40
What are present in the chromosomes in each cell nucleus?
genes
10 of 40
What controls growth and development in organisms and the development of characteristics?
genes
11 of 40
How do genes control characteristics?
by providing the instructions to produce protiens
12 of 40
What two pairs make up DNA?
AT and CG
13 of 40
In mitosis what does each new cell have?
identical sets of chromosomes as the parent cell, the same number of chromosomes as the parent cell, the same genes as the parent cell
14 of 40
What happens when a cell enters the growth phase in mitosis?
the number of organelles increase and the chromosomes are copied
15 of 40
What happens when a cell enters the division phase in mitosis?
the copies of the chromosomes separate and the cell divides
16 of 40
What do gametes contain half the number of as the parent cell?
chromosomes
17 of 40
What does information stored in the genes have to be transferred into?
the cytoplasm
18 of 40
Why cant DNA leave the nucleus?
it is too large
19 of 40
During gene transfers what are the smaller molecules called?
messenger RNA (mRNA)
20 of 40
What is a group of three base pairs codes for one amino acid in a protein chain called?
a triplet code
21 of 40
Until the 8 cell stage what are all cells in a human embryo?
unspecialised, can have any gene switched on to form any kind of specialised cell
22 of 40
Up until the 8 cell stage what are the cells known as?
embryonic stem cells
23 of 40
What happens to the cells in an embryo after the 8 cell stage?
they become specialised, they form different types of tissue
24 of 40
What could stem cells potentially be used to do?
help treat diseases and disorders and repair damage to various tissues
25 of 40
What are the three sources of stem cells?
embryos, blood from the umbilical cord, adult stem cells from bone marrow
26 of 40
When is the nucleus removed from an egg cell and replaced with a nucleus from one of the patients cells then the egg cell is stimulated so it starts to divide and then some of the cells are removed at the 8 cell stage?
theraputic cloning
27 of 40
Which process do plant cells use to divide?
mitosis
28 of 40
Which areas does plant growth only occur?
meristems
29 of 40
What are sites where unspecialised cells are dividing by mitosis called?
meristems
30 of 40
What are the two types of meristem?
lateral and apical
31 of 40
What does lateral lead to?
increased girth
32 of 40
What does apical lead to?
increased height and longer roots
33 of 40
What are xylem tubes used by the plant for?
transporting water and soluble mineral salts from the roots to the stem and leaves and replacing the water lost during transpiration and photosynthesis
34 of 40
What are phloem tubes used by the plant for?
to transport dissolved food to the whole plant for respiration or storage
35 of 40
What are auxins?
the main plant hormones used in horticulture
36 of 40
What do auxins do?
affect cell division at the tip of a shoot, cause cells to grow in size just under the tip so that the stem or roots grow longer
37 of 40
What is it called when plants respond to light by changing the direction in which they grow?
phototropism
38 of 40
What do auxins do to guide the stem?
spread out to grow up, or move to sides to bend
39 of 40
What do plants do during phototropism?
grow towards the light
40 of 40

Other cards in this set

Card 2

Front

What do similar cells form?

Back

tissue

Card 3

Front

What do groups of tissue form?

Back

Preview of the front of card 3

Card 4

Front

What is the division of body cells to produce new cells called?

Back

Preview of the front of card 4

Card 5

Front

What does mitosis occur for?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Science resources:

See all Science resources »See all Growth and Development resources »