The circulatory system and the skeleton are ultimately formed by which embryonic layer of cells?
A) endoderm
B) mesoderm
C) ectoderm
D) trophoblast
B) mesoderm
Psychology
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For most of late adulthood, cognitive declines are
What will be an ideal response?
Psychology
Which of the following is a valid statement relating to research concerning genetic influence on cognitive abilities?
a. Fraternal twins have higher correlations on scores of cognitive functioning than do monozygotic twins. b. Different types of cognitive abilities are influenced to the same extent by genetics. c. For general cognitive ability, heritability decreases with age. d. Meta-analyses of variance in IQ scores among twins suggest that 50% of the variance can be explained by genetic differences.
Psychology