If a scientist is studying the heritability of IQ, which people would show the highest correlation between their IQ scores?
A) two unrelated children
B) a child and his mother
C) monozygotic twins
D) dizygotic twins
C
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Dll is a gene known to direct limb development in the fruit fly
Researchers studying this gene have found that it is also expressed in developing appendages in animals from many other phyla, supporting the hypothesis that all animal appendages may be homologous. However, suppose researchers looking at Dll activity had instead found the results shown in the figure above. These results suggest instead that _____. A) Dll is not actually involved in appendage development B) appendages evolved separately in protostomes and deuterostomes C) appendages coevolved with segmentation D) all animal appendages are homologous
A single cell in a smoker's lung has become cancerous. It doubles its DNA and divides much faster
than a normal lung cell. The most likely change that would have caused this condition took place inthe:a. nucleus. b. nucleolus. c. microtubule. d. mitochondria. e. lysosome
A nonliving object that can spread infection is a ________
Fill in the blank(s) with the appropriate word(s).
Hemostasis involves which blood component?
A. basophils B. platelets C. phagocytes D. monocytes E. neutrophils