Molecular studies point to the order Zygnematales, whose modern representatives include ____, as the sister clade of all
land plants.
a. Equisetum
b. Plasmodium
c. Marchantia
d. Spirogyra
e. Giardia
ANSWER: d
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Baja California is a relatively dry Mexican state but has begun to desalinate seawater for the eastern and driest part of the state. If you were one of the managers of an irrigation project using this water, what measures would you adopt?
What will be an ideal response?
Which of the following statements about carbohydrates is INCORRECT?
A. Carbohydrates are a good source of energy. B. Carbohydrates contain approximately 2 hydrogens per carbon in the molecule. C. Most carbohydrates dissolve in water. D. Carbohydrates contain argon, carbon, hydrogen, and oxygen atoms.
Seventy to 90 percent of the genetic material in a gamete made in your body could be inherited from your mother. How could this be?
a. The above statement is incorrect. Fifty percent of the genetic material in your gametes comes from your father. b. You receive maternal genes through the placenta and through breast milk. c. The X chromosome is substantially larger than the Y chromosome. d. Your maternal genes kill off your paternal genes at a greater rate than your paternal genes kill off your maternal genes. e. You receive many mitochondria, which have their own genome, from your mother, but not from your father.
Infection with HIV is listed as the cause of death for an AIDS patient.
Answer the following statement true (T) or false (F)