Many human traits, such as our performance on intelligence tests or our susceptibility to heart disease, are ________
A) determined only by our genes
B) influenced by both genes and the environment
C) determined by genes in some people and by the environment in other people
D) not affected by our genes
B
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In which soil would the cactus receive the most appropriate amount of water for its needs?
a. soil A b. soil B c. soil C d. It would receive the appropriate amount of water from all the soil types.
Which of the following would not be true of bilateral symmetry?
a. It evolved in cephalic organisms. b. It evolved in cnidarians. c. Animals with bilateral symmetry have oral and aboral surfaces. d. It results from schizocoelous development. e. It occurs in diploblastic organisms.
Which of the following bacterial genera produce(s) endospores?
A) Bacillus B) Clostridium C) Lactobacillus D) both Bacillus and Lactobacillus E) both Bacillus and Clostridium
Why are "fortified" foods more likely to spoil than are unfortified foods?
A) The added vitamins and minerals can promote microbial growth. B) The foods are fortified by the addition of vitamin-producing microbes. C) Every step of modification or manipulation of food increases the chance for contamination. D) Vitamins are frequently contaminated by the microbes that produced them. E) The vitamins require a neutral pH environment, which is suitable for many microbes.