For the first few days after birth, the mammary glands produce a pale fluid rich in proteins, antibodies, minerals, and
vitamin A known as ____.
a. lanugo
b. meconium
c. colostrum
d. surfactant
e. premilk
ANSWER: c
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Which of the following molecules is made up of codons?
a. mRNA b. DNA c. tRNA d. ribosome
Why did Mendel choose pea plants to experiment on?
A. Offspring of pea plants are fertile. B. They have a number of different distinct traits. C. They are self-fertilizing. D. They have a relatively short life cycle. E. All of theses are reasons Mendel chose pea plants to experiment on.
Genomic imprinting is caused by epigenetic changes to DNA Indicate whether the statement is true or false
When atoms gain or lose electrons, they become negatively or positively charged. These negatively or positively charged atoms are known as
A. isomers. B. unstable atoms. C. ions. D. isotopes.