Which of the following statements would be LEAST acceptable to most zoologists?
A) The first fossils resembling lancelets appeared in the fossil record around 530 million years ago.
B) Recent work in molecular systematics supports the hypothesis that lancelets are the basal clade of chordates.
C) The extant lancelets are the immediate ancestors of the fishes.
D) Lancelets display the same method of swimming as do fishes.
C
You might also like to view...
In some rocky intertidal habitats, the barnacle Chthamalus can survive across the same depths as can the barnacle Balanus
However, where the two occur together, Chthamalus adults are found only in the more stressful upper portions of the habitat where they are more prone to desiccation. This is an example of: A. the mutualistic form of symbiosis. B. intraspecific competition reducing the size of Chthamalus' fundamental niche to a smaller realized niche. C. mutualism reducing the size of Balanus' realized niche to a smaller fundamental niche. D. competitive exclusion reducing the size of Chthamalus' fundamental niche to a smaller realized niche. E. competitive exclusion expanding the size of Balanus' realized niche to a larger fundamental niche.
In the United States, parathion is the most widely used member of a class of ____
a. organophosphate herbicides b. organophosphate insecticides c. chlorophosphate fungicides d. chlorophosphate herbicides e. chlorophosphate insecticides
Which of the following has been associated with the flesh-eating organism?
A. H. lechter B. Pseudomonas aeruginosa C. Staphylococcus aureus D. Streptococcus pyogenes
Answer the following statements true (T) or false (F)
1. Joseph Connell proposed that at low rates of disturbance, a community will become dominated by K-selected species.
2.
The map above shows the southwestern tip of Alaska, including the Aleutian Islands. True or False: According to MacArthur and Wilson's island biogeography model, Kodiak Island would have more species than Kiska.
3. The productivity hypothesis would predict that there would be more species per unit area in the southwestern U.S. than in the Amazon rainforest.
4. A metagenomic library is a typical tool for analyzing diversity of flowering plants.