BloodThe way needed substances are carried to the body cells.
valvesStructure that prevents blood from flowing backward.
capillariesVessels where materials are exchanged between the blood and the body cells.
ventriclePumps blood out of the heart
Answer from: Quest
Resistance than a bicycle? i'm not entirely sure
Answer from: Quest
•there must be variation for the particular trait within a population.
•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).
•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good
explanation:
Another question on Biology
Biology, 22.06.2019 09:00
When the cell concentrates potassium within, against the natural tendency of matter, it is performing a.passive diffusion b.facilitated diffusion c.active transport d.pinocytosis
When it is summer at the south pole, a. the northern hemisphere is tilted toward the sun. b. the southern hemisphere is tilted away from the sun. c. the northern hemisphere is tilted away from the sun. d. both the southern and northern hemispheres are tilted toward the sun.