Which animal phylum lacks true tissues?

a. Annelida (segmented worms)
b. Porifera (sponges)
c. Cnidaria (jellies, corals, and their relatives)
d. Nematoda (roundworms)
e. Platyhelminthes(flatworms)


Ans: b. Porifera (sponges)

Biology & Microbiology

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Answer the question using the accompanying figure. This figure illustrates the life cycle of a ____

a. brown algae b. green algae c. water mold d. plasmodial slime mold e. cellular slime mold

Biology & Microbiology

Meiosis functions in _____

a. asexual reproduction of single-celled eukaryotes b. growth and tissue repair in multicelled species c. sexual reproduction d. asexual reproduction of single-celled eukaryotes and growth and tissue repair in multicelled species

Biology & Microbiology

Place these statements in their proper sequence.Walking through the botanical garden with a friend, you spy a rare and beautiful variety of Hosta. "Oh I would love to have one of those!" you exclaim. "But they cost a king's ransom." Your friend smiles, snips off a tiny piece of the shoot, and says, "I'll grow you one. I'll just take it back to lab and...1. use enzymes to break down the cell walls..."2. grow up a callus..."3. wait for somatic embryos to form..."4. culture an individual plantlet for you..."

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Which part of the ATP molecule breaks free of the rest when an ATP molecule releases energy?


A) part A
B) part B
C) part C
D) part D

Biology & Microbiology