Acquired immunity involves both a humoral immune response and a cell-mediated immune response.

Sort the items into the appropriate bins depending on whether they are involved in the humoral response, the cell-mediated response, or both the humoral and the cell-mediated responses.

1. Helper T cells and cytokines
2. antibodies
3. B cells
4. antigen-presenting cells
5. plasma cells
6. cytotoxic T cells
7. memory cells

i think that d. wind is the answer.   i missed the question when i answered a. currents.

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

not only is it colder, it also becomes darker, less salty, and more dense.