During transcription, at the point where the DNA strand being copied has an adenine, _______________ is added to the mRNA.
a cytosine
an adenine
a thymine
a guanine
a uracil
a uracil
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Agastino Bassi demonstrated that a type of silkworm disease was caused by a fungus and proposed that many diseases are caused by microorganisms.
Answer the following statement true (T) or false (F)
A cat and a dog share a space in the barn. The cat gives birth to kittens in the dog's bed and then leaves
them alone. Later, you notice that the kittens follow the dog around during the day. This is an example of which type of behavior? a. imprinting b. habituation c. classical conditioning d. operant conditioning e. insight learning
The ____ secretes melatonin, a hormone that promotes sleep in human beings
a. pineal gland b. suprachiasmatic nucleus c. crepuscular gland d. biological clock e. hypothalamus
The metabolic pathways that produce ATP may be either ___ or ____ depending on the availability of oxygen.
Fill in the blank(s) with the appropriate word(s).