Biology Unit 2 AOS1 SAC- continuing on

Question 1

binary fission

Answer 1

• function: reproduction
• occurs in unicellular organisms
• product: two cells with identical genomes (full sets of DNA)

Question 2

budding

Answer 2

• a fully formed individual breaks off the adult.
  -the budded individual may need to grow before it can also produce a bud.

Question 3

fragmentation

Answer 3

• can occur deliberately or as a result of damage.
• some organisms reproduce by breaking into pieces.
• more common in plants.
• starfish

Question 4

vegetative reproduction

Answer 4

-plants
- piece of plant breaks off and is grown into a fully formed individual
- results in a clone of the parent plant

Question 5

spores

Answer 5

• cells which can grow into a new plant
• produced by meiosis
• offspring only has one member of each homologous pair and thus the offspring may not be identical to the parent.

Question 6

parthenogenesis

Answer 6

• development of a new individual from an unfertilized egg.
• may not be genetically identical like spores

Question 7

cloning- negative

Answer 7

• lack of genetic diversity
• lack of biodiversity overall because many previously grown varieties are no longer grown anywhere.

Question 8

population

Answer 8

all members of one species living in a particular ecosystem at a particular time.

Question 9

community

Answer 9

all of the species of living things living in a particular ecosystem at a particular time.

Question 10

ecosystem

Answer 10

the living organisms, non-living environment and all of the interactions between them

Question 11

habitat

Answer 11

the environment in which a particular organism lives.

Question 12

what do food webs and food chains show

Answer 12

the movement of energy through ecosystems

Question 12

genetic diversity

Answer 12

• beneficial because it increases the chances of species survival in changing conditions.
• all of the different genes and alleles present in a species or population

Question 13

what is each level of the food chain called

Answer 13

trophic level

Question 13

base of the food chain

Answer 13

producer or autotroph

Question 14

consumers/heterotrophs

Answer 14

organisms that get their energy by consuming/eating other organisms

Question 15

scavengers:

Answer 15

animals which eat the dead remains of other animals

Question 16

omnivores

Answer 16

animals which eat both plants and other animals

Question 17

herbivores

Answer 17

animals which only eat plants

Question 18

carnivores

Answer 18

animals which only eat other animals

Question 19

order of the food chain

Answer 19

sunlight - producer - primary consumer( (herbivore) - secondary consumer - tertiary consumer - top carnivore