A substance produced by brown algae that is used as an emulsifying and thickening agent in many foods and other products is
A. red ooze.
B. carrageenan.
C. gelatin.
D. agar.
E. algin.
E. algin.
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In Drosophila, the hunchback gene encodes a protein (HB) that has a role in the development of the thorax. In the zygote and embryo, the expression of hunchback is stimulated by high concentrations of Bicoid protein. Which of the following is accurate about the expression of hunchback in the Drosophila embryo?
A. The HB protein is produced throughout the embryo. B. The HB protein is produced only in the anterior half of the embryo. C. The HB protein is produced only in the posterior half of the embryo. D. The HB protein is produced in the middle of the embryo; but is not produced in the anterior or posterior end. E. No HB protein is produced in the embryo.
How many different amino acids make up
proteins?
a. 4 b. 8 c. 12 d. 16 e. 20
A map unit is based on a recombination frequency of:
1.1% 2.5% 3.10% 4.25% 5.50%
___________, such as sea stars, are invertebrate
members of the deuterostome lineage. Fill in the blank(s) with the appropriate word(s).