Me with theses 4 science questions

question 1

two organisms are said to be different species if they:

can interbreed, but will produce sterile offspring.
cannot interbreed.
have markedly different physical characteristics.
both a and b are true

question 5

how far back in the taxonomic categories do you have to go to find a group that has living relatives of humans?

genus (homo)
family (hominid)
order (primates)
class (mammals)

question 9

which kingdom contains organisms that do not have nuclei or complex cell structures?

plantae
animalia
protista
eubacteria

question 10

where are there more phylums found?

land
ocean
equal number found in both
forests