Different groups of animals have evolved different organs to take in oxygen and send out carbon dioxide; but they all have certain common characters. mention four such characters.            

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Aparent with freckles is crossed with a parent without freckles. the punnett square shows the possible genotypes and phenotypes of the offspring. which statement accurately describes the probability of phenotypes? a. the offspring are more likely to have freckles. b. the offspring are more likely to have no freckles. c. the likelihood of the offspring having freckles and not having freckles is the same. d. the likelihood of the offspring having freckles and not having freckles cannot be determined.

Which feature of a human community is similar to a niche in a biological community