The first hominin known to use sophisticated tools and fire was _______________. Fill in the blank(s) with the appropriate word(s)


ANS: Homo erectus

Biology & Microbiology

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The rate of catalysis is proportional to the concentration of the enzyme

Indicate whether the statement is true or false.

Biology & Microbiology

O2 is transported from air in the lungs into the blood through the process of ____

a. active transport b. simple diffusion c. facilitated diffusion d. osmosis e. active transport

Biology & Microbiology

During photosynthesis in a leaf, sugars are loaded into the sieve tube by , followed by to move water which increases pressure.

A. osmosis; gravity B. gravity; active transport C. active transport; osmosis D. osmosis; facilitated diffusion E. facilitated diffusion; osmosis

Biology & Microbiology

Which of the following provides evidence for the signal hypothesis for the targeting of a secretory protein to the rough ER?

a. The protein is larger when synthesized in vitro on free polysomes. b. The secretory protein ends up in the cytosol when a short sequence is deleted by genetic engineering. c. A normally cytosolic protein is secreted when a specific sequence is added to it by genetic engineering. d. All of the above

Biology & Microbiology