Which two processes are the primary sources of genetic variation?
mitosis and fertilization
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Biology, 29.01.2021 21:40, ksalinas7404
Which two processes are the primary sources of genetic variation?
mitosis and fertilization
synapsis and disjunction
mutation and recombination
overpopulation and reproduction
Answers: 1
Biology, 21.06.2019 14:30, LexyClaire
We want most cells to be even in and out which is called
Answers: 1
Biology, 21.06.2019 17:40, goaliekid2663
There are six elements that make up most of the human body. which of the following is not one of these six elements?
Answers: 2
Biology, 22.06.2019 01:30, aliciagore
Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere
Answers: 1
Biology, 22.06.2019 03:30, gaby6951
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
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