What is the distribution of phenotypes from a cross of purple tall pea plants that are heterozygous for flower color and plant height? (Purple is dominant to white; tall is dominant to dwarf.)
A. 63 purple tall; 28 purple tall; 27 white dwarf; 7 white dwarf
B. 132 purple tall; 138 white dwarf
C. 54 purple tall; 6 white dwarf
D. 100% purple tall
E. 27 purple dwarf; 28 purple tall; 31 white dwarf; 29 white tall
A. 63 purple tall; 28 purple tall; 27 white dwarf; 7 white dwarf
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The Calvin cycle in C3 plants occurs in ________ cells, whereas the Calvin cycle in C4 plants occurs in the ________.
Fill in the blank(s) with the appropriate word(s).
In plants, the IP3/DAG pathways control the organism's responses to water loss and changes in light intensity
a. True b. False
The rapid growth of the human population still seen today began in the
A) 1200s. B) 1400s. C) 1700s. D) 1800s. E) 1900s.
Please match the types of mutations with the statements that most accurately describe them, to test your understanding of their causes.
Induced mutation A) Random change in the DNA arising from errors in replication that occur without a known cause B) Result from exposure to known mutagens, which are primarily physical or chemical agents that damage DNA C) Changing of single base in the DNA code that may result in the placement of a different amino acid D) Addition or deletion of bases that changes the reading of mRNA codons