Life began on Earth approximately ________ years ago
A) 100,000
B) 1 million
C) 5 million
D) 3.8 billion
E) 4.6 billion
D
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Place the following digestive structures of an annelid in the proper order, beginning at the start of the digestive tract
a. mouth ?esophagus ?crop ?gizzard ?intestine ?anus b. mouth ?esophagus ?intestine ?crop ?gizzard ?anus c. mouth ?esophagus ?gizzard ?crop ?intestine ?anus d. mouth ?esophagus ?crop ?intestine ?gizzard ?anus e. mouth ?esophagus ?intestine ?gizzard ?crop ?anus
Unusually high rates of rare heritable traits, such as achromatopsia in the Pingelapese people, is often due to ________
A) genetic drift B) natural selection C) hitchhiking D) the founder effect E) None of the above.
An extracellular matrix is produced by glycoprotein secretion by:
A. animal cells B. plant cells C. fungal cells D. bacterial cells
Golgi bodies are examples of a (membranous/non-membranous/cellular) organelle
What will be an ideal response?