Outline at least 3 ecological roles of the giant kelps
What will be an ideal response?
Giant kelps play a number of ecological roles in their environments. They provide a canopy of high primary productivity. They are an important habitat for numerous species of invertebrates and fish. Many species feed directly on the kelps. They play an important role in protecting bottom communities from strong currents. Dislodged kelps continue to produce, provide protection, and enable juvenile animals to migrate. Beached kelps provide food for an active detritus-based community including amphipods and shore birds.
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A road that dichotomizes is
(a) an intersection of two crossroads. (b) a road that forks into two roads. (c) a road that has numerous entrances and exits. (d) a road that leads nowhere.
The clustered, regularly interspaced short palindromic repeats (CRISPR) system in bacterial cells has been called the "immune" system of bacteria. CRISPR protect bacteria from a repeat infection from the same phage because bacterial cells
A. recognize proteins on the surface of the phage and secrete enzymes that digest the phage. B. recognize proteins on the surface of the phage and secrete proteins that block the binding of the phage. C. integrate fragments from the phage DNA in their own chromosomes and target for destruction any DNA that contains the same fragments in the future. D. modify the attachment sites for the phages so that new infections cannot take place.
Using hair as the derived trait, four of the following organisms fit in the clade. Which one does not fit?
a. whale b. crocodile c. wolf d. elephant e. tiger
Enzymes are composed of:
A) nucleotides. B) sucrose molecules. C) glucose molecules. D) glucose and sucrose molecules. E) amino acids.