A genetic cross was performed with two pea plants both with green, wrinkled seeds. Of the resulting offspring, 75% had green, wrinkled seeds and 25% had green, smooth seeds (W = wrinkled; w = smooth)
With regard to wrinkled versus smooth seeds, the parental plants must have been ________.
Fill in the blank with correct word.
Answer: heterozygous or Ww
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Plants such as peppermint and sage contain oils. What is the function of these oils?
A. They help keep the plant from drying out. B. They help repel insects. C. They keep other plants from germinating nearby. D. They prevent fungal infection. E. They have hormone-like activity that helps wounds heal.
One part of Darwin's theory is that individuals with certain traits have an increased competitive edge. The source of
these traits in individuals is due to ____. a. adaptation to the stress b. development over a lifetime c. inheritance from birth d. mutation after birth e. allele changes after birth
The primary neurotransmitter at neuromuscular junctions in skeletal muscle is _________.
A. glutamate B. acetylcholine C. norepinephrine D. GABA
Factors of weather and climate that operate on a population regardless of its size are called ________ effects.
Fill in the blank(s) with the appropriate word(s).