Environmental science

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i'm a little unsure about my answers for these questions. Can someone please check them for me?, thanks.:

15. All of the following are major interactions between species EXCEPT
a. competition and mutualism
b. predation and parasitism
c. commensalism and competition
d. adaption and dispersion

D

21. Which of the following is one of the main properties used to describe a population?
a. number of individuals
b. variations in hybrids
c. number of species
d. kind of adaptions

A

____

10. Each of the following is an example of a parasite EXCEPT
a. a roundowrm in a human's intestine
b. a cow in a pasture
c. a tick on a cat
d. mistletoe on a tree

D

Thank you once again

  • Environmental science -

    I agree with your first two answers.

    But rethink the meaning of parasite for your last answer. You may also want to look up mistletoe.

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