問題一覧
1
Regulates the size of organs, controls light entering the ye, under involuntary control
smooth muscle
2
Pumps the blood and under involuntary conteol
cardiac muscle
3
Responsible for coordinating and controlling many bodily activities
nervous tissue
4
Body Cell is also called as ________
Somatic cell
5
sex cell is also called as ______
reproductive cell
6
How many cell is in the Body cell or somatic cell
46
7
How many cell is in the Sex cell or reproductive cell
23
8
In somatic cell Labelled = In humans 2n =
- 2n - 46 chromosomes
9
Types of cell division where single cell decides twice and produce four daughter cell with haft the amount of genetic material (sex cells)
Meiosis
10
Homologous chromosomes crossing over
prophase 1
11
The chromosomes align in pairs in the centre of the cell
metaphase 1
12
Chromosomes pairs seperated and move to opposite end of the cell
anaphase 1
13
Two new nuclei form around each set of chromosomes
telophase 1
14
Prophase 2
phase 2 happens to allow 4 haploid sex cells sperm and egg cell to be created
15
Chromosomes align single file in the centre of the cell
metaphase 2
16
Sister chromatids seperate and move to opposite end of the cell
anaphase 2
17
Four new nuclei form around each set of chromosomes
telophase 2
18
process of mitosis
interphase - prophase - metaphase - anaphase - telophase - cytokinesis
19
The biological process by which new individuals
reproduction
20
Are produced from their parents or parents
offspring
21
Life of a cell from the time it is first formed during division of a parents cell until its own division into two daughter cell
cell cycle
22
Regulated at certain checkpoint by both internal and external signal
cell cycle control system
23
Process where a single parents cell decides to make two identical daughter cell
mitosis
24
Undergo mitosis to reproduce asexuality
unicellular organism
25
Undergo mitosis to create new cells for growth and repair old cells
multicellular organism
26
Stage of mitosis
Chromosomes (genetic material) condense and the nuclulos disappear
27
Microtubules extending from each centrosome can now invade the nuclear area
prometaphase
28
Chromosomes align in the centre of the cell and attach to microtubules in preparation to split apart
metaphase
29
Chromatids separate and move to opposite end of the cell
anaphase
30
The cytoplsm of the parents cell splits to form two indentical daughters
cytokinesis
31
The cell grows and copies it's DNA
Interphase
32
The cell divides it DNA and cytoplasm, forming two new cells
Mitosis
33
G1 phase
cell growth
34
S phase
DNA synthesis
35
G2 phase
more growth, preparation for mitosis
36
Resting state where the cell performs it's function and is not preparing to divide
Go
37
Duplication of chromosomes
S phase