FtsZ, MreB, and CreS proteins regulate the shape and structure of bacterial (prokaryote) cells. These proteins are homologous to the ________ in eukaryotes.
A. cytoskeleton
B. DNA processing enzymes
C. cell wall
D. organelles
Answer: A
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Ten angstroms (Å) is equivalent to _____________¬_ microns (µm)
A. 10.0 B. 1.0 C. 0.1 D. 0.01 E. 0.001
NO can only function as a paracrine regulator because____
a. it is hydrophilic and cannot travel free in the blood b. it is hydrophobic and cannot travel free in the blood c. it is rapidly converted into nitrates and nitrites d. its receptors are rapidly turned over e. its receptors are immediately internalized when the ligand binds
Most of the creamy flesh of a corn kernel is ____ tissue
a. pollen b. endosperm c. ovary d. carpel e. ovulec
A governmental group reviewed the benefits of building a hydroelectric dam on a river in Alaska and determined that the dam would pay for itself within 20 years by producing electricity. However, a conservation group lobbied against the project because of the potential damage it would cause to the environment. Each group issued the following public statements on the project. Which of the statements reflect an environmental benefit of this project?
A) The government will collect higher taxes on sales made to the employees working on building the dam. B) Land loss due to flooding behind the dam will wipe out a large section of forest and riverbank habitat. C) Businesses will spend more money in electrical costs the first two years due to changes in equipment. D) A species known to be endangered will increase significantly in numbers due to changes in the environment.