18. a particular breed of dog can have long hair or short hair. when true-breeding long-haired animals were crossed to true-breeding short-haired animals, the offspring all had long hair. the f2 generation consisted of a 3: 1 ratio of long- to short-haired animals. a second gene affects the texture of the hair. the two variants are wiry hair and straight hair. f1 offspring from a cross of these two varieties all had wiry hair, and f2 offspring showed a 3: 1 ratio of wiry- to straight-haired puppies. recently, a breeder of the short-, wiry-haired dogs discovered a female puppy that was albino. similarly, another breeder of the long-, straight-haired dogs found a male puppy that was albino. the albino trait is due to a recessive allele. the two breeders got together and mated the two dogs. surprisingly, all the puppies in the litter had black hair. how would you explain this result

Complete the sentences by matching the names of trees to the appropriate blanks. to do this, drag the names on the left into the appropriate blanks in the sentences on the right. match the words in the left column to the appropriate blanks in the sentences on the right. terms may be used more than once. make certain you have filled every blank with a term before clicking submit. 1. deciduous trees lose their leaves seasonally and include trees such as maple and elm. 2. conifer leaves are generally thin and needle-like, while seeds are contained in cones. conifers include cedar and pine. 3. evergreens are plants that maintain their leaves in all seasons and include trees such as cedar, elm, and pine. 4. hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as maple, , and cedar. elm returned you filled in 2 of 10 blanks incorrectly. mango trees are tropical broad leaf plants that maintain their leaves all year long. no credit lost. try again.

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

What is the difference between topsoil and clay?