Perch have paired pectoral and pelvic fins, and two dorsal fins, the first one spiny and the second soft. These two fins can be separate or joined.
Answer:
A.
Explanation:
Sexual reproduction requires that diploid organisms produce haploid cells that can fuse during fertilization to form diploid offspring.
Answer:
it should be a) force = mass x acceleration
Explanation:
<u>substrate</u> fits into the <u>active site</u>, so the answer is C
Sponges are organisms that are members of phylum prolifera, they are simple multicellular animals without a mouth, muscles, heart or brain.Sponges's tissues contains collar cells and amoebaocytes in its tissues. They feed by drawing water in through their pores and filter out food particles. Sponge larvae are more animal-like than adult sponges because they are free-swimming organisms.
