Which of the following describes fertilization? a. Cell differentiation to form a blastula
b. A sperm joining an egg to form a zygote
c. Sperm and egg production
d. Formation of germ layers in a deuterostome

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

If two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotybes? oa) one is ii ob) one is ibi oc) both are bi od) nothing, this is impossible

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils