7. Watermelons are exposed to a mutagen
to produce a variety that has four sets of
chromosomes. The new variety is then crossed
with a normal watermelon to produce seedless
watermelons. What type of mutation is involved in
the growing of seedless watermelon?
a. point mutation
b. gene duplication
c. frameshift mutation
d. trisomy 21
Answers: 3
Biology, 22.06.2019 00:00
Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy
Answers: 2
Biology, 22.06.2019 01:30
15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated
Answers: 1
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 10:30
19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase
Answers: 2
7. Watermelons are exposed to a mutagen
to produce a variety that has four sets of
chromosome...
chromosome...
Chemistry, 24.12.2019 08:31
World Languages, 24.12.2019 08:31
Social Studies, 24.12.2019 08:31
Mathematics, 24.12.2019 08:31
Arts, 24.12.2019 08:31
Arts, 24.12.2019 08:31
Spanish, 24.12.2019 08:31
Biology, 24.12.2019 08:31
Chemistry, 24.12.2019 08:31
History, 24.12.2019 08:31
Biology, 24.12.2019 08:31