Answer the following statements true (T) or false (F)
1. Tuberculosis and Hansen disease (leprosy) are caused by Mycoplasma spp.
2. It is possible for scarlet fever and toxic shock syndrome to be caused by the same pathogen.
3. The most common cause of gas gangrene also causes a type of food poisoning.
4. The most common cause of gas gangrene also causes a type of food poisoning.
5. Botulism, gas gangrene, and tetanus are all caused by Clostridium spp.
1. FALSE
2. TRUE
3. FALSE
4. TRUE
5. TRUE
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As a result of the hormonal and neuroanatomical differences between the male and female brains of zebra finches,
____.
a. only males sing their species songs b. only females sing their species songs c. males sing their species songs at earlier ages than females d. females sing their species songs at earlier ages than males e. females only sing their species songs later in their lives
Four of the five answers listed below are true of a neuron at resting potential. Select the exception
a. The interior of a neuron is positive. b. The interior of a neuron has a negative charge. c. There are more sodium ions outside a neuron. d. There are more potassium ions inside a neuron. e. The membrane of a neuron is polarized.
The starting substrate for vinegar production is ________.
A. a salt solution B. water C. fruit juice D. an alcoholic solution
Natural selection can maintain genetic variation by favoring heterozygous genotypes. In equatorial Africa, the best genotype to have for hemoglobin is heterozygous (HbA / HbS). In the United States, there is no advantage to the heterozygous genotype. HbA codes for normal hemoglobin, whereas HbS codes for abnormal hemoglobin that causes red blood cells to become distorted in shape (sickle cell). Explain why the heterozygous state is advantageous in Africa, but not in the United States. What has happened to the sickle-cell allele in Africa? What has happened to the sickle-cell allele in the United States?
What will be an ideal response?