You are a botanist who is immersed in your attempt to increase a certain property in your plant of study. To that end, you induce a mutation that doubles the amount of vascular cambium (a type of meristem) in your plant. Assuming this brings the desired effect, what exactly was the property that you sought to increase?
A. Production of new growth at the tip of stems.
B. Production of secondary xylem and phloem.
C. Production of only xylem to make wood.
D. Production of bark only.
E. Production of new leaves.
B. Production of secondary xylem and phloem.
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A pathway for cell growth control is conserved between Drosophila and humans, indicating that the
pathway is _______.
a. also found in prokaryotes d. at least 3.8 billion years old b. also found in all animals e. at least 8 million years old c. at least 800 million years old
Which of the following describes a template strand?
a. a DNA strand that specifies the complementary mRNA molecule b. a DNA strand that is not used to transcribe mRNA c. a region of locally unwound DNA that allows for transcription of mRNA d. a sequence present in protein-coding mRNA
The half-life of 14C is 5,730 years. If you test a fossilized bone and find that it has 1/8th the 14C as a modern bone, you could conclude that it is approximately years old.
A. 5,730 × 3 = 17,190 B. 5,730 × 2 = 11,460 C. 5,730 × 1 = 5,730 D. 5,730 / 8 = 716 E. 5,730 × 8 = 42,960
The short appendages on some pathogenic bacteria that provides adhesion to host cells are called
What will be an ideal response?