The portion of the tRNA molecule that binds to the codon on the mRNA is called the ________.
A. paracodon
B. anticodon
C. complementary codon
D. c-codon
Answer: B
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Land plants are thought to be most closely related to the ____
a. chlorophyte algae b. red algae c. charophyte algae d. brown algae e. euglenoids
The concentration of oxygen is lower at high altitudes. Why would this make it harder for a person to get enough oxygen into their blood?
A. Hemoglobin cannot bind oxygen well at low concentrations. B. The concentration gradient from the alveoli to the blood decreases. C. People are working harder at high altitudes and have higher demands for oxygen. D. The concentration of oxygen in the blood is too low for diffusion into tissues. E. The heart cannot obtain enough energy to pump oxygen into the blood from the alveoli.
Tortoises colorizing the different Galapagos islands and evolving into different species is an example of ______ speciation.
A. prezygotic B. allopatric C. postzygotic D. sympatric E. outgroup
Answer the following questions true (T) or false (F)
1. Some species of mosses have pollen that does not have to move through water to reach an egg. 2. Endosperm is the nutritional tissue found within a seed. 3. A single type of pinecone is responsible for the production of both pollen and eggs.