Which of the following lack a nucleus?
A) Animalia
B) Bacteria
C) Fungi
D) Protozoa
E) None
Ans: B) Bacteria
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Analysis of the similarities and differences in protein-coding genes and other types of sequences in the genomes of different species is an area of study called ____
Fill in the blank with the appropriate word.
You made your first batch (ever) of wine about 6 weeks ago. You used a new plastic garbage can, covered with plastic wrap over the top, for the process. Now you get a cup of it out of the container only to find no alcohol--just really bad juice. What went wrong?
A. The plastic of the container released chemicals that killed the yeasts. B. The yeasts were not under anaerobic conditions. C. You bought the wrong yeast species at the store. D. Your yeasts mutated into non-alcohol producing organisms.
Four __________ glands make a hormone that acts on bone and kidney cells and raises blood calcium level. Fill in the blank(s) with the appropriate word(s)
Approximately what percentage of the visible light that reaches Earth's producers is converted to chemical energy?
A) 10% B) 0.1% C) 1% D) 0.01%