What are homologous structures, and how do they provide evidence for evolution?
What will be an ideal response?
is the presence of structures in organisms that share the same basic form.
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There are seemingly conflicting studies that have taken a look at whether Neanderthals interbred with human ancestors. One study of mitochondrial DNA suggests that the two groups did not interbreed
Another study, of the whole genome, suggests that they did. Which of the following could explain these results? A. Taking a look at the whole genome is much more reliable than looking at mitochondrial DNA. B. Mitochondrial DNA is more susceptible to mutations than nuclear DNA so more change would be expected. C. Mitochondrial DNA is passed on the maternal side, so if Neanderthal females did not interbreed with our ancestors, Neanderthal mitochondrial DNA would never have entered the modern human gene pool. D. Genomic DNA is more susceptible to mutations than mitochondrial DNA, so more change we be expected. E. None of the answer options is correct.
Which is the correct sequence for the evolution of reptilian features?
A. notochord, jaws, vertebrae, bony skeleton, lungs, 4 limbs and an amniotic egg B. vertebrae, jaws, notochord, bony skeleton, lungs, 4 limbs and an amniotic egg C. notochord, vertebrae, jaws, 4 limbs, bony skeleton, lungs, and an amniotic egg D. notochord, vertebrae, jaws, bony skeleton, lungs, 4 limbs and an amniotic egg E. notochord, vertebrae, jaws, cartilaginous skeleton, lungs, 4 limbs and an amniotic egg
In a human female, which of the following would be inhibited by an inhibition of LH?
a. maturation of follicles b. secretion of estrogen c. secretion of FSH d. secretion of GnRH
During DNA replication, ________ are 1000-2000 nucleotide long strands synthesized on the ________ strand to maintain the ________ of replication
A) primers; leading; discontinuity B) Okazaki fragments; lagging; bidirectionality C) primers, lagging; continuity D) Okazaki fragments; leading, accuracy E) Okazaki fragments; leading; semidiscontinuity