Ecologists use survivorship curves to visualize how the number of individuals in a population drops off with time. by plotting the number of survivors per 1,000 individuals on a log scale versus time, three basic patterns emerge, seen here in the graph. most individuals in this population produce many thousands of offspring, most of whom die right away. relatively little effort or parental care is invested in each individual. once this initial period is over, survivorship is relatively constant.
Answers: 2
Biology, 22.06.2019 03:00
During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.
Answers: 3
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 04:10
What noticeable trend from this graph might be used to make a conclusion?
Answers: 1
Biology, 22.06.2019 10:30
16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.
Answers: 3
Ecologists use survivorship curves to visualize how the number of individuals in a population drops...
English, 12.03.2021 19:20
Mathematics, 12.03.2021 19:20
Engineering, 12.03.2021 19:20
Biology, 12.03.2021 19:20
Mathematics, 12.03.2021 19:20
Mathematics, 12.03.2021 19:20
Mathematics, 12.03.2021 19:20
History, 12.03.2021 19:20
Mathematics, 12.03.2021 19:20
Chemistry, 12.03.2021 19:20
Mathematics, 12.03.2021 19:20
Mathematics, 12.03.2021 19:20
Mathematics, 12.03.2021 19:20