A(n) ________ mycelium is a branching network of filaments that rises above the agar growth medium.
Fill in the blank(s) with the appropriate word(s).
aerial
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Why is cell communication considered evolutionarily ancient?
What will be an ideal response?
Acetylation
a. adds an acetyl group (CH3CO?) to the cytosine nucleotides of DNA. b. adds an acetyl group (CH3CH2?) to the DNA of a promoter sequence. c. adds an acetyl group (CH3CO?) to the histone protecting the transcription unit of a gene. d. adds an acetyl group (CH3CO?) to the histone protecting the promoter region of a gene. e. adds an acetyl group (CH3CH2?) to the RNA polymerase that will initiate transcription at the promoter region.
Which of the following has a major effect on the rate of transpiration?
a. soil minerals b. growth rate c. air temperature d. predation
A variant of a trait coded for by a gene is known as ________.
a. DNA b. an allele c. a homozygote d. a hybrid