Which of the following describes parasitic worms?
A. multicellular pathogen that lives in the intestinal
tract of host to absorb nutrients
B. living, single celled organism that are the most
common pathogen and can be treated with antibiotics
C. single-celled eukaryotes that are usually found in
contaminated water or insect bites
D. non-living pathogen that can't be treated with
antibiotics and reproduces with a host

the answer to your question is sperm

this is a good question! i'll do some research and come back when i have the answer!

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

the correct answer is 2 and 4