Biology B2
問題一覧
1
46 chromosomes and 23 gametes
2
This ensures that after cell division, each new cell gets an exact copy of the genetic materal in the original cell
3
They occurr in somatic cells; this means that it takes place in all types of cells that are not involved in the production of gametes
4
Prophase The nuclear envelope breaks down and Chromosomes condense Interphase Dna is copied making X shapes Prophase Chromosomes pair up Metaphase Chromosomes line up at the equator Anaphase Sister chrimatids pull apart Telophase The Chromosomes are at the ppoles and becoming more diffuse
5
Chromosomes are long, thin strings of genetic material made of DNA and proteins
6
segment of DNA that codes for a protein
7
A mature haploid male or female germ cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote
8
Differentiation becomes more likely the older and furtherance from the tip the cells are
9
Organisation start as a single cell. This moust divide to make a multicellular organism, which will differentiate enabling them to fulfill specific roles
10
Remove pieces of tissue from parent cell, grow tissue with a growth medium containing nutrients and growth hormones, move them to a potting compost to carry on growing when shoots and roots produce
11
Plant cells have regions of rapid cell division called meristems. these growth regions contain stem cells that can be used to produce clones cheaply and quickly
12
Clip of cells of plant abd put it into sterile agar jelly This then forms a callous, to which overtime will turn into platelets
13
Embryonic stem cells are adult stem undifferentiated; cells are partially differentiated
14
They can develop into any type of cell found in a human body
15
To improve the yields of a certain crop or plant
16
Stem cells divide to produce new cells, which can then divide into different cell types. They cna then replace damaged tissues and treat medical conditions and disease
17
A human eggs is given from a donor. The nucleus is removed and discarded The cell is then stimulated to divide and the cell develops into an embryo After 4-5 days stem cells are removed and are then used for therapeutic use
18
They are great for treating patients with currently untreatable conditions Growing organs for transplants Medical search Cons Mutations can occurr in stem cells and can behave like cancer cells They could be dominated with viruses There are ethical beleaves as you are technically destroying life
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Weimar and Nazi Germany
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Ben Stone · 9問 · 2年前Weather and seasons
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Ben Stone · 22問 · 2年前Crime and punishment
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12問 • 2年前問題一覧
1
46 chromosomes and 23 gametes
2
This ensures that after cell division, each new cell gets an exact copy of the genetic materal in the original cell
3
They occurr in somatic cells; this means that it takes place in all types of cells that are not involved in the production of gametes
4
Prophase The nuclear envelope breaks down and Chromosomes condense Interphase Dna is copied making X shapes Prophase Chromosomes pair up Metaphase Chromosomes line up at the equator Anaphase Sister chrimatids pull apart Telophase The Chromosomes are at the ppoles and becoming more diffuse
5
Chromosomes are long, thin strings of genetic material made of DNA and proteins
6
segment of DNA that codes for a protein
7
A mature haploid male or female germ cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote
8
Differentiation becomes more likely the older and furtherance from the tip the cells are
9
Organisation start as a single cell. This moust divide to make a multicellular organism, which will differentiate enabling them to fulfill specific roles
10
Remove pieces of tissue from parent cell, grow tissue with a growth medium containing nutrients and growth hormones, move them to a potting compost to carry on growing when shoots and roots produce
11
Plant cells have regions of rapid cell division called meristems. these growth regions contain stem cells that can be used to produce clones cheaply and quickly
12
Clip of cells of plant abd put it into sterile agar jelly This then forms a callous, to which overtime will turn into platelets
13
Embryonic stem cells are adult stem undifferentiated; cells are partially differentiated
14
They can develop into any type of cell found in a human body
15
To improve the yields of a certain crop or plant
16
Stem cells divide to produce new cells, which can then divide into different cell types. They cna then replace damaged tissues and treat medical conditions and disease
17
A human eggs is given from a donor. The nucleus is removed and discarded The cell is then stimulated to divide and the cell develops into an embryo After 4-5 days stem cells are removed and are then used for therapeutic use
18
They are great for treating patients with currently untreatable conditions Growing organs for transplants Medical search Cons Mutations can occurr in stem cells and can behave like cancer cells They could be dominated with viruses There are ethical beleaves as you are technically destroying life