All plant organs (such as leaves, roots, and stems) contain tissues from all three tissue systems.
Answer the following statement true (T) or false (F)
True
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Single-celled eukaryotic organisms that lack chlorophyll are called
A. Algae. B. Protozoa. C. Chlorophyta. D. Salmonella.
Barringer Crater in Arizona was formed when
a 300,000-ton asteroid slammed into Earth 50,000 years ago. Which of the following is true about this event? a. It hit so early that it had little influence on the history of life. b. This one produced about 150 times the energy of the bomb that hit Hiroshima. c. Its impact produced a minor crater. d. Scientists recently disproved that an asteroid impacted our planet just prior to the mass extinctions at the K-T boundary. e. An asteroid impact releases only minor amounts of energy.
Being overweight, sluggish, intolerant of cold, confused, and depressed are symptoms of
a. hyperthyroidism. b. Grave's disease. c. acromegaly. d. hypothyroidism. e. Wilson's disease.
Which statement best supports why animals most likely evolved in the ocean?
a. The ocean water provided buoyanc
b. They did not require a skeleton for support. c. Internal fluid and salt balance was easy to maintain. d. Reproduction was independent of internal fertilization. e. The changeable temperature facilitated natural selection.