The first close human relative known to have dispersed out of Africa was ________. [two words]
Fill in the blank(s) with correct word
Homo erectus/ergaster
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Suppose a cell's membrane is permeable to water, but not to Na+ or Cl? or any other solute. The NaCl concentration is
higher outside the cell than inside the cell, and the osmolarity of the cell is higher than that of the solution surrounding the cell. What will occur?
a. Overall, the cell will lose water. b. Overall, the cell will take up water, Na+, and Cl?. c. Overall, the cell will take up water. d. Overall, the cell will take up water and lose Na+ and Cl?. e. Overall, the cell will lose water and take up Na+ and Cl?.
Which statement is true?
a. Retroviruses hijack existing reverse-transcription processes in cell to reproduce. b. Retroviruses activate vestigial genes in host cells to facilitate viral reproduction. c. Retrovirus genomes are encoded in RNA and must be converted to DNA in the cell. d. Retroviruses only become symptomatic within the offspring of infected host organisms.
Semiconservative DNA replication means that
A) A pairs with T and G pairs with C. B) each new DNA molecule has half the DNA from the old one. C) the old DNA is completely broken down. D) the old DNA remains completely intact. E) only half of the DNA is replicated.
Which type of cell has a nucleus and membrane bound organelles
What will be an ideal response?