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)
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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
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
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).
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