Fluid-filled sacs known as ________ function to cushion certain joints, such as the elbow joint

Fill in the blank(s) with correct word


bursae

Biology & Microbiology

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Consider the phylogenetic tree shown above. Geographic labels indicate the origin of humans sampled for mtDNA sequence analysis. Chimp is the outgroup. Which of the following statements is correct?

A. The tree supports the "out of Africa hypothesis" for the origin humans because it implies that the common ancestor of all the humans is of African origin. B. The tree does not reveal anything about the geographic original of humans. C. The tree supports the multi-regional hypothesis because there are four independent populations. D. The closest relative to the Kenyans are the English. E. The Chinese share a more recent common ancestor with the Ethiopians than the Kenyans.

Biology & Microbiology

On a pedigree chart, what symbol would represent a son who is affected by a genetic disorder?

A) a shaded circle B) a clear circle C) a shaded square D) a clear square

Biology & Microbiology

Put the following steps in order according to how light energy gets converted to chemical energy during photosynthesis

What will be an ideal response?

Biology & Microbiology

A stack of thylakoids inside a chloroplast are known as what?

A) stroma B) granum C) thylakoid space D) cristae E) chloroplast

Biology & Microbiology