Decay And The Carbon Cycle

Question 1

how elements get out back into the soil

Answer 1

in waste products produced by organisms or when they die

Question 1

how elements get out back into the soil

Answer 1

in waste products produced by organisms or when they die

Question 2

compost bins

Answer 2

recreate ideal conditions for decay

to be used as fertiliser

Question 3

carbon cycle3

Answer 3

1. carbon taken out of the air by photosynthesis
2. carbon moves through food chain
3. carbon returned to air due to respiration and combustion

Question 4

genetic variation due to

Answer 4

inheriting a mixture of both parents genes

Question 5

both types of variation3

Answer 5

height intelligence health

Question 6

nucleus

Answer 6

contains genetic material in form of chromosomes

Question 7

chromosomes 3

Answer 7

long lenght of DNA thats been coiled up
come in pairs
humans have 23 pairs

Question 8

genes

Answer 8

short sections of DNA that control our characteristics

Question 9

alleles

Answer 9

different versions of the same gene

Question 10

sexual reproduction

Answer 10

fusion of gametes to form a cell with the full number of gametes
offspring inherits features from both parents

Question 11

asexual reproduction

Answer 11

one parent cell where the chromosomes split down the middle
two membranes are formed and the DNA replicates itself to create wholechromosomes
offspring is genetically identical

Question 12

cloning plants 2

Answer 12

1.cuttings quick cheap
2.tissue culture
plant cells Ian growth medium with hormones to be grown into new plants

Question 13

embryo transplants

Answer 13

embryo developed from artificially fertilised eggs are split to form clones which can then be implant3d in many cows

Question 14

adult cellcloning

Answer 14

unf.egg has its genetic material removed which is replaced with a complete set of chromos from an adult body cell
the egg is stimulated by electric shock making it divide
embryos implanted into uterus

Question 15

genetic engineering

Answer 15

1. useful gene cut from one organisms chromo using enzymes

2. enzymes used to cut another organisms chromos and then to insert the useful gene