A reaction in progress has
a. more entropy than the same reaction at equilibrium.
b. less entropy than the same reaction at equilibrium.
c. the same entropy than the same reaction at equilibrium.
d. much less entropy than the same reaction at equilibrium.
e. an entropy level that is impossible to determine without additional information.
A
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If a kelp farmer wanted to maximize her harvest, which type of echinoderm would she be most concerned about in the habitat?
A) sand dollars B) brittle stars C) sea stars D) sea urchins E) sea cucumbers
Which of the following best describes three DIFFERENCES that occur among these four types of algae?
A. They are all composed of cells, have flagella and photosynthesize.
B. Chlamydomonas reinhardtil is a single celled algae, while the other three are multicellular with identical cells.
C. Chlamydomonas reinhardtil is a single celled algae, Gonium pectorale is composed of identical cells, and Pleodorina californica and Volvox are composed of different cell types (somatic and reproductive).
D. Chlamydomonas reinhardtil is a multicellular algae, Gonium pectorale is a single celled algae but is shown in a group, and Pleodorina californica and Volvox are multicellular algae.
E. Chlamydomonas reinhardtil is a single celled algae, Gonium pectorale is multicellular, Pleodorina californica is composed of different cell types (somatic and reproductive) and Volvox is not an algae because it cannot photosynthesize.
Studying the Sepia apama cuttlefish, Hanlon, Naud, and their colleagues observed that most success in producing fertilized eggs was attributed to the males guarding mated females from subsequent mating attempts by other males. What additional behavior contributed to successful production of fertilized eggs?
A. As opportunistic hermaphrodites, smaller males were able to mate and reproduce as females. B. Smaller males distracted larger males for more than 40 minutes, past the viability of their sperm, and then the smaller males mated with the females. C. The sparse population density of Sepia apama cuttlefish results in lower but equal reproductive successes among smaller and less aggressive males. D. Smaller, less aggressive males used mimicry of females to approach guarded females repeatedly to mate. E. All of the answer choices are correct.
Which of the following cell types is long lived and continues to produce antibody?
a. cytotoxic T cells b. memory B cells c. T helper cells d. plasma cells e. macrophages