In the figure above, the animal colored blue in the box represents:
a) a female elephant seal.
b) the only low-ranking male elephant seal to produce offspring.
c) the dominant male elephant seal.
d) the offspring of the low-ranking elephant seals.
e) the offspring of the dominant male elephant seal.
Ans: b) the only low-ranking male elephant seal to produce offspring.
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Eukaryotes probably originated about
A. four billion years ago. B. two billion years ago. C. four million years ago. D. three billion years ago. E. three million years ago.
The BEST way to protect yourself from the effects of radiation is to:
A) wear a suit designed to completely shield yourself. B) use time, distance, and shielding to your advantage. C) wear a lead suit and self-contained breathing apparatus. D) limit your exposure at an incident to less than 10 minutes.
Answer the following questions true (T) or false (F)
1. Molecular second-line defenses include cytokines, iron-binding proteins, and complement proteins. 2. Ferritin is a specific example of a siderophore produced by Borrelia bugdorferi. 3. Complement activation has three different outcomes but which outcome occurs depends on which complement pathway is activated.
Which statement is true about prokaryotes?
A. They do not divide by mitosis. B. They contain a long, linear strand of DNA as the genetic material. C. They lack ribosomes. D. They contain a nucleus. E. They usually lack a cell wall.