Feathers in birds appear to have first evolved for insulation but later conveyed a new advantage in helping create light aerodynamic surfaces. the switch in function is an example of a(n) ____________.
A. Paedomorphosis
B. An analogy
C. Exaptation
D. An adaptation
Ans: C. Exaptation
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Localized infections by pyogenic bacteria often form boils or abscesses
Indicate whether the statement is true or false.
What is a limitation of the tree of life phylogenetic model that necessitated the development of newer models?
a. It cannot explain the origin single-cell organisms. b. It cannot explain vertical gene transfer. c. It cannot explain horizontal gene transfer. d. It cannot explain development of organelles.
In mammals, the filtrate leaves the blood by exiting from the
a. efferent arteriole. b. peritubular capillaries. c. renal artery. d. afferent arteriole. e. glomerulus.
Peas (Pisum sativum) were well suited for Mendel's breeding experiments for all of the following EXCEPT
a) many of the characteristics that vary in pea plants are controlled by single genes b) peas have a particularly long generation time c) peas exhibit variations in a number of observable characteristics, such as flower color and seed shape d) it is easy to obtain large numbers of offspring from any given cross e) Mendel and his staff could control the pollination between different pea plants