Astudent was observing slides of cell division in one of the slides he noticed loosely coiled chromatin depicting dna replication which phase of the cell cycle could it be

DNA replication occurs during the S phase.

Explanation:

During the processes of the cell cycle is a phase called the S phase (Synthesis Phase) in which the DNA is replicated, occurring between the two phases G1 and G2.

Complete accurate DNA instructions in the cell must be duplicated in order to produce two similar daughter cells which occurs during the S phase where loosely coiled chromatin can be seen.

i think the answer is

mass

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.