Which part of a cell encloses the protoplasm and permits soluble substances to enter and leave the cell?

What molecule does hemoglobin decay into over time

Which one is an advantage of external fertilization a. the offspring are genetically identical to the parents b. more eggs can be fertilzed at one time c. more sperm can be released at one time d. more protection is available for developing plz

Make a claim about the factors that cause inherited genetic variations within populations. also make a claim about the effects of mutations.