In many ways, a mule is a superior animal to the horse or donkey. Mules are often stronger and can jump higher than either of their parents. Why, then, are mules considered to be a "weak hybrid"?They are more prone to disease than are horses and donkeys.They are sterile.They do not live as long as horses and donkeys.Their offspring are progressively weaker than the parents.

Mules are sterile and are the result of crossing a horse with a donkey. This is an example of:Group of answer choiceslow hybrid zygote viabilitylow hybrid adult viabilityhybrid zonegametic isolationhybrid infertility

The mule is the result of the interbreeding of two separate species. Mules cannot form fertile, viable offspring with horses, donkeys, or mules. The mule is therefore an example of which of the following?Multiple choice question.A species that originated because of an autopolyploid event in the horseA hybrid species that can produce viable offspringA new species that originated through hybridizationA species that evolved allopatrically to the horseA sterile hybrid

Which is left unexplained by the biological species concept, thereby weakening the concept?Multiple choice question.The existence of viable, but sterile hybrids (such as the mule)Hybridization in natural settingsHybridization in captivity

If you mate a donkey (2n = 62) with a horse (2n = 64) you get a mule. Mules are sterile and cannot produce gametes by meiosis because theyMultiple Choicecontain too few chromosomes.have an odd number of chromosomes.have an even number of chromosomes.contain too many chromosomes.lack genes that are essential for life.

Which of the following produces hybrids such as mules?Group of answer choicespremating isolating mechanismsepigeneticsasexual reproductionpostmating isolating mechanisms