Which of these are characteristics of all animal cells? check all that apply. they contain a nucleus. they are eukaryotic. they lack membrane-bound organelles. they lack a nucleus. they are prokaryotic. they contain membrane-bound organelles.

The body is protected against harmful flu viruses by

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature about 37 degrees celsius (98.6 degrees f)? describe what might happened the temperature decreased by 10 degrees celsius.

92 sathe best for the question 11. most animals and plants reproduce sexually. this means that dna is passed down to new organisms from two parental organisms. which of the following is a key advantage of sexual reproduction?