The enzymes for cellular respiration in eukaryotic organisms are located within the mitochondria. In prokaryotic organisms, these enzymes are attached to the
A. cell wall.
B. cell membrane.
C. ribosomes.
D. circular DNA.
E. nuclear membrane.
B. cell membrane.
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If you saw a vascular plant that was growing low to the ground with branching stems covered by small leaves in a helical pattern and that produced spores on leaves, you are most likely observing a(n):
A. fern. B. horsetail. C. gymnosperm. D. angiosperm. E. lycophyte.
After fertilization occurs in a flowering plant, the ovary becomes a(n) ____
a. gametophyte b. ovule c. seed d. fruit e. endosperm
The central nervous system is housed in the
a. cranial and spinal cavities. b. cranial cavity only. c. thoracic cavity. d. pelvic cavity. e. abdominal cavity.
Many weeds have become resistant to the herbicides that were once used to control them. Which of the following statements best explains this observation?
A. Natural selection has acted on the genetic variability in the weeds’ genomes, enabling plants that have herbicide resistance to reproduce more successfully. B. The weeds have evolved to become different species. C. The herbicides have evolved and are no longer effective against the weeds. D. Continental drift has caused the evolution of weed resistance in the herbicides.