1. Producing new cells

Question 1

How many chromosomes are in the body?

Answer 1

46

Question 2

why do cells divide?

Answer 2

growth and repair

Question 3

centromere

Answer 3

when replicated, chromosomes join up by a centromere. They are now called chromatids

Question 4

Diploid

Answer 4

2

Question 5

mitosis stage 1

Answer 5

chromosomes replicate, they are joined in the centre by the centromere and are called chromatids

Question 6

mitosis stage 2

Answer 6

nuclear membrane disappears

Question 7

mitosis stage 3

Answer 7

chromatids line up along the equator and are attached by the spindle fibres

Question 8

mitosis stage 4

Answer 8

cytoplasm divides and the cells split from 2 identical daughter cells containing the same number of chromosomes as parent cell

Question 9

mitosis stage 5

Answer 9

nuclear membrane forms around each nucleus

Question 10

mitosis stage 6

Answer 10

spindle fibres shorten pulling the chromatids apart to opposite poles

Question 11

Specialised cells

Answer 11

cells that have different functions that allow them to carry out different functions

Question 12

Cell

Answer 12

basic unit of life

Question 13

Tissue

Answer 13

groups of specialised cells that perform one function

Question 14

system

Answer 14

group of organs which work together

Question 15

Organ

Answer 15

structure made up of several different tissues that perform different functions

Question 16

Tissue stem cells

Answer 16

can change into different types of cells

Question 17

Embryonic stem cells

Answer 17

can change to any type of cell

Question 18

stem cells

Answer 18

unspecialised cells, potential to become different cells, involved in growth and repair