Two genes are located on separate chromosomes. One gene determines hair color in foxes, where AA is lethal before birth, Aa is platinum hair, aa is silver hair. A second gene pair B and b determines hair length where short hair is dominant to long hair. A platinum fox that was pure breeding for short hair length is crossed with silver fox with long hair. The F1 contained foxes that were platinum and others that were silver. Two of the platinum F1 foxes were mated. What are the phenotypes and phenotypic ratios for the foxes in the F2 generation. a. 6 platinum short: 2 platinum long: 3 silver short; 1 silver long b. 2 platinum short: 6 platinun long: 1 silver short;3 silver lont c. 1 platinum short: 6 silver long: 2 platinum long: 3 silver short d. 6 silver short: 1 silver long: 2 platinum long: 3 platinum short e. none of these

Which organism is the producer in this food web? 7th grade question. a) arthropods b) birds c) fungi d) plants

Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs