During the last two months of fetal development of the female, sex hormones cause bone remodeling of the pelvic girdle that adapts it for pregnancy and birth
Indicate whether the statement is true or false
FALSE
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Ecology and environmentalism are the same scientific discipline.
Answer the following statement true (T) or false (F)
Oxygen built up in the atmosphere approximately 2 billion years ago and
a. occurred due to carbon dioxide being split by lightning strikes. b. could not have occurred without the oxygen coming from outer space. c. destroyed ozone forming more oxygen. d. helped to form the ozone layer that is so important to life today. e. occurred because aerobic organisms required the oxygen.
In science, if a result is deemed statistically
significant, that means
a. it is a very important result. b. it has a high probability of being incorrect. c. it has a low probability of being skewed by sampling error. d. there is very little variation in the data. e. there is no doubt of the result being true
When homologous chromosomes cross over, what occurs?
A) Two chromatids get tangled, resulting in one re-sequencing its DNA. B) Two sister chromatids exchange identical pieces of DNA. C) Corresponding segments of non-sister chromatids are exchanged. D) Maternal alleles are "corrected" to be like paternal alleles and vice versa.