In which of the following ways do cycads and
ginkgos differ from conifers?
a. cycads and ginkgos have flagellated sperm;
conifers do not have flagellated sperm
b. conifers have microspores and megaspores;
cycads and ginkgos have only one type of
spore
c. cycads and ginkgos form fruits; conifers do
not
d. conifers form seeds on the surface of the
ovules; cycads and ginkgos form seeds in
enclosed structures
e. conifer form seeds from female
gametophytes; cycads and ginkgos form
seeds from male gametophytes
A
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Using sequence data, it has been shown that:
A. humans evolved from the Neanderthals. B. Homo sapiens arose gradually in many places. C. Homo sapiens arose separately from Homo erectus and Homo neanderthalensis, expanding out of Africa. D. Homo sapiens arose separately from Homo erectus and Homo neanderthalensis, expanding out of Asia. E. Homo sapiens evolved from Homo erectus.
Among cats, there is great variation in color and length of coats from long-haired, orange and
white Ragdolls and Persians to cats with little to no hair.
These traits associated with fur type are examples of __________ traits.a. acquired b. inherited c. evolutionary d. genomic
Which is most likely to happen to a human polyploid?
a. natural abortion b. death around the age of 1 year c. survival until the early teens d. survival until the mid-thirties e. death around the age of 1 month
These vertebrates are unique in that they:
1.have skeletons made of cartilage
2.do not have jaws
3.lack appendages
4.lay amniotic eggs