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bio exam review
for bio exam
| Question | Answer |
|---|---|
| what is an example of asexual reproduction? | binary fission |
| during which stage of the cell cycle does the cell divide? | mitosis |
| what happens when the cell cycle is not regulated properly | cancerous cells may form |
| which is the longest state of the cell cycle? | interphase (includes the G1, S, and G2 phase) |
| why do cells divide when they grow too large? | to maintain surface area to volume ratio |
| how do daughter cells work? | the amount of DNA in the two daughter cells is the same as the amount of DNA in the parent cells |
| how does mitosis help maintain genetic continuity? | produces identical daughter cells |
| what are the reactants of photosynthesis? | carbon dioxide and water |
| what are the products of cellular respiration? | carbon dioxide, water, ATP |
| which process releases energy for the cell? | cellular respiration |
| what does the conversion of ATP to ADP represent? | energy release |
| where does the Krebs cycle occur? | matrix of the mitochondra |
| where does the electron transport chain occur? | inner mitochondrial membrane |
| why does energy decrease at each level of an energy pyramid? | energy is lost as heat |
| how does photosynthesis affect the carbon cycle? | removes co2 from the atmosphere |
| how does respiration affect the oxygen cycle? | uses oxygen and releases co2 |
| whya re plants and animals independent in energy flow? | plants produce oxygen and glucose, animals use them and return co2 |
| which biogeochemical cycle involves photosynthesis and cellular respiration? | carbon cycle |
| which trophic level has the most access to the most energy in an ecosystem? | producers |
| after a community is disrupted by a large scale event, such as a forest fire, a new community is established through which process? | secondary succession |
| in an ecosystem, what happens to the atoms of certain chemical elements, such as carbon, oxygen, and nitrogen? | they move into and out of living systems |
| why is the cycling of matter important in an ecosystem? | organisms will continue to get the nutrients needed to build the necessary macromolecules |
| what is a limiting factor in a populations? | migration |
| what is an example of mutualism? | a bee pollinating a flower |
| what human activity reduces biodiversity? | using pesticides |
| a plant grows in dry soil and has deep roots. what does this show? | it is adapted to drought |
| what is likely a result of a volcanic eruption in an ecosystem? | disruption of limiting factor |
| a plant grows in dry soil and has deep roots. what does this show? | it is adapted to drought |