In __________, an anus forms first
Answer: deuterostomes
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A marine biologist is conducting research on animals that have a lophophore and two calcified shells. Based on this information, this animal must belong to the phylum
A. Mollusca. B. Phoronida. C. Ectoprocta. D. Bryopoda. E. Brachiopoda.
The 9:6:1 F2 ratio found in fruit shape in summer squash is a deviation from an expected Mendelian ratio. What does this represent?
What will be an ideal response?
Fossil and genetic evidence strongly supports the idea that modern humans
A) independently arose from three different ancestral Homo species in Africa and Eurasia. B) all derive from a single African lineage that spread from there into other parts of the world starting about 50,000 years ago. C) derive from an African lineage but also have genes derived from mixing with several Eurasian descendants of Homo erectus. D) derive from Neanderthals that independently evolved the features of modern humans in Europe and Africa.
T or F: There are seven types of diarthrodial joints
What will be an ideal response?