Biology, 30.12.2020 20:20 laequity3393
Although flowers have a common ancestor, they vary quite differently due to the environment and their specific pollinators. This is an example of
Answers: 2
Biology, 22.06.2019 03:30
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.
Answers: 2
Biology, 22.06.2019 06:10
Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a.m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed
Answers: 2
Biology, 22.06.2019 11:40
Compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, describe the parts of a cell and their primary function.
Answers: 1
Although flowers have a common ancestor, they vary quite differently due to the environment and thei...
Computers and Technology, 03.12.2020 03:00
Health, 03.12.2020 03:00
Mathematics, 03.12.2020 03:00
Mathematics, 03.12.2020 03:00
Mathematics, 03.12.2020 03:00
English, 03.12.2020 03:00
History, 03.12.2020 03:00
Mathematics, 03.12.2020 03:00
English, 03.12.2020 03:00
Mathematics, 03.12.2020 03:00
English, 03.12.2020 03:00
Mathematics, 03.12.2020 03:00
Mathematics, 03.12.2020 03:00
Mathematics, 03.12.2020 03:00
Mathematics, 03.12.2020 03:00
English, 03.12.2020 03:00