What is the material called that remains
after reabsorption?

Urine

Explanation:

A filtrate is formed after reabsorption occurs in the nephron of the kidney. Reabsorption of some salts and water accurs at the distal convulated tubule. The filtrate then moves into the proximal convulated tubule where selective reabsorption occurs also. The filtrate is then passed into the collecting duct. From the collecting duct, the filtrate now called urine enters the pelvic of the kidney into the ureter to the urinary bladder.

answer; ///(b) it is composed of four protein chains and four heme groups;

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.