bio sac chapter 8+9

define ecosystem

define ecosystem

all living and non-living things in a community

populations

a group of individuals of the same species living in the same area at the same time

community

all different species living in a habitat at one time

variation

where members of a population differ in one or more traits

what can cause variation?

can be caused by mutations, selection pressures (epigenetics), or sexual reproduction (crossing over)

why is variation important?

This allows for genetic diversity, increases our gene pool, and helps us adapt and survive.

how do prokaryotes asexually reproduce?

binary fission

how do eukaryotes asexually reproduce?

mitosis

what are some disadvantages of asexual reproduction?

hard to get variation as offspring are genetically identical, can increase competition between them

what are some advantages of asexual reproduction?

can reproduce fast and a lot than sexual reproduction, don’t need to spend a lot of time finding a partner

what are some disadvantages of sexual reproduction?

its slow, risk of transferable disease via sex,

what are some advantages of sexual reproduction?

offspring are genetically unique which allows genetic diversity, reduce inheritance of genetic disease

define adaptation

a feature that can assist in the survival and reproduction of an organism in their environment

define structural adaptation

features you can see

define behavioural adaptation

actions done in response to a stimulus

define physiological adaptations

adaptations that occur inside the body

define maladaptations

adaptations that does more harm than good

define symbiosis

a relationship between two or more different species where at least one is benefited or harmed.

mutualism

a relationship where both organisms are benefited

commensalism

a relationship where one isn’t affected and the other is being benefited

parasitism

a relationship where one is being harmed while the other is being benefited

ammensalism

a relationship where on is being harmed while the other one is unaffected.

competition

individual of the same or different species fight for

intraspecific

same species

interspecific

different species

predator-prey relationships

the population of predators and prey are dependent on each other

ecological niche

the specific role an organism plays in an ecosystem.