The long snout of the giant anteater, Myrmecophaga tridactyla, of South America, and the echidna, Tachyglossus aculeatus, of Australia, are animals of different evolutionary lineages that are both adapted to eating ants. This is an example of
A. selective breeding.
B. anatomical homology.
C. analogous traits.
D. artificial selection.
E. Both analogous traits and artificial selection are correct.
C. analogous traits.
You might also like to view...
If the DNA in a cell consists of 20% A, it will be G.
A. 20% B. 30% C. 10% D. 80% E. 40%
Lethal genes (genes that result in the failure to develop a vital organ or metabolic pathway) are nearly always recessive. Animal breeders who discover a unique trait and selectively breed to increase the occurrence of that trait often encounter a noticeable increase in lethal genes. Why?
A. "Pleiotropy"-the gene that is being selected for this trait may have the second effect of being lethal. B. The lethal recessive gene may be incompletely dominant. C. Spreading the gene among offspring of both sexes will increase the likelihood it will be sex-linked and expressed. D. "Epistasis"-selection for the desired trait may result in "uncovering" the lethal gene. E. The selective-mating of closely related individuals, or inbreeding, increases the chances that two recessive genes will "meet" in offspring.
In 2005, the United States had a population of approximately 295,000,000 people. If the birth rate was 13 births for every 1,000 people, approximately how many births occurred in the United States in 2005?
A) 3,800 B) 38,000 C) 380,000 D) 3,800,000 E) 38,000,000
Water is able to cross plant plasma membranes by a combination of
A. diffusion and phloem. B. root pressure and turgidity. C. transpiration and Casparian strips. D. osmosis and aquaporins. E. evaporation and diffusion.