1. What type of reproduction requires male and female sex cells to unit A external fertilization
B. internal fertilization
C. sexual reproduction
D. asexual reproduction
2. Which is NOT TRUE about sexual reproduction in animals?
A. it promote differences
B. it has only one parent
C. the young animals resemble each other
D. animals may hatch from eggs or bor alive
3. Which of the following is TRUE about the heat cycle in cats?
A cats stay in heat for about 10-30 days
B. cats in heat are moody towards people
C. cats in heat are quiet and like to lay down
cats in heat make more noise, louder and more frequent

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

What does the symbol (–hfus) indicate in a phase change?

Which description best characterizes the motion of particles in a solid?