Free radicals can be damaging because they are _____.
a) unstable
b) highly reactive
c) radioactive
d) both unstable and highly reactive
Ans: d) both unstable and highly reactive
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Which component is the oxidizing agent in the following chemical reaction?
4 Fe + 3 O2 ? 2 Fe2O3 a. rust b. iron c. water d. oxygen e. hydrogen
In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus on the same chromosome, there is a dominant gene for red eyes and its recessive allele for purple eyes. A male that was heterozygous at both gene loci was mated with a female that was homozygous for both recessive alleles and the following results were observed among the offspring:Normal wings and red eyes - 420Vestigial wings and red eyes - 80Normal wings and purple eyes - 70Vestigial wings and purple eyes - 430According to these data, what is the distance, in centimorgans, between these 2 gene loci? (Enter the number only without the units. For example, 100 cM would be entered as 100)
Fill in the blank(s) with the appropriate word(s).
Which process is necessary to prevent the doubling of genome size during sexual reproduction?
a) apoptosis b) meiosis c) mitosis d) metastasis e) contact inhibition
The marine protists with pore-studded shells called tests belong to which group?
A. sarcodina B. rhodophyta C. foraminifera D. chlorophyta