Which of the following are post-zygotic reproductive barriers? a. Different mating songs prevent mate recognition b. Species A breeds in Spring, Species B breeds in summer c. Species A and B mate, but the embryos die before hatching d. The gametes of species A aren’t compatible with the gametes of species B e. Species A and B can mate and produce healthy offspring, but the offspring are infertile

1. Why do waterfowls posses an intromittent organ that is highly elaborated? 2. What happens if you press down on the skin of a screamer? Why? 3. Please characterize the mating system of rheas.  4. How is the populationof rheas that has taken residency in europe faring?

How does lupine affect the range of the Karner Blue butterfly? A Lupine displaces Karner Blue host plants. B Lupine promotes diseases of Karner Blue. C The Karner Blue is found everywhere lupine is found. D The Karner Blue can only live where lupine grows.

Fruit flies of the genus Drosophila are distributed worldwide, but 30-40% are found on Hawaiian islands. How can you explain this distribution pattern? I’m addition, most species that have been identified are almost indistinguishable from other species and yet vary few hybrids have ever been observed. How might this phenomenon be explained?

What is the effect of sexual reproduction on LD? O a. Increases LD O b. Acts like selection to maintain LD O c. Decreases LD O d. No effect

Mules are hybrids of donkeys and horses, and they are sterile. Which term correctly describes this reproductive isolating mechanism between donkeys and horses? Mechanical Postzygotice Prezygotic Temporal Behaviora

Scientists have also noticed unusual coloration among certain condor populations. Andean condors are typically black in color.  However, a few unique white feathered individuals have occasionally been noted. These white feathered individuals are not well-camouflaged, and are easily spotted by larger predators.  Recently, scientists noted that a black feathered condor had mated with a white-feathered condor, and their three chicks all appeared to have gray feathers. Closer examination of these condor chicks revealed that the chicks actually possessed a mixture of black feathers and white feathers, giving them a gray appearance from a distance. Please NAME and EXPLAIN the genetic phenomenon described here.

The phenomenon of ____ results from the unequal size of the male and female gametes and the markedly different amounts of parental investment in the resulting offspring.  As a result of this phenomenon, females tend to be the choosier sex in most vertebrate species.    A. anisogamy   B. isogamy   C. isostacy    D. pleiotropy    E. heterogeneity

In humans, mammals and many other chordates sexual reproduction takes place by fusion of large immobile ovum and small motile sperm. This kind of sexual reproduction is: Select one: a. Isogamy b. Schizogony c. Oogamy d. Conjugation e. Polyteny

Compare and contrast sexual and asexual reproduction.  Identify the most accurate statement.   a. Asexual reproduction results in more offspring per mother.   b. Sexual reproduction is always more costly.   c. Sexual reproduction is associated with an increase in homozygosity.   d. Asexual reproduction is always bad for a species.