Gamma radiation ________.
A. is used to sterilize some food products
B. has poor penetrating power
C. has a longer wavelength than UV radiation
D. is a type of nonionizing radiation
Answer: A
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Because it secretes substances into ducts that connect to the duodenum, the pancreas acts as an ____ gland of the digestive system
Fill in the blank with the appropriate word.
The relatively high percentage of individuals in West Africa who are heterozygous for the sickle cell trait is an example of _____
a. natural selection b. genetic drift c. spontaneous mutational spread d. heterozygote disadvantage e. the founder effect
Similar to the nucleus, chloroplasts and mitochondria are ________
A) surrounded by two membranes B) able to synthesize carbohydrates C) manufactured by the nucleolus D) able to synthesize lipids
What tissue type produces the tough coverings that package organs?
A. dense regular connective tissue B. collagen C. dense irregular connective tissue D. loose connective tissue E. adipose