Which of the following is a characteristic of living organisms?
A) Maintenance and regulation of internal conditions
B) Ability to produce energy
C) Have a nucleus
D) Eat other organisms
E) Have membrane-bound organelles
A
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In what stage of meiosis does synapsis occur?
A. metaphase II B. anaphase I C. prophase I D. prophase II E. metaphase I
Most of the nutrient digestion and absorption takes place in the ____
a. stomach b. duodenum c. jejunum d. ileum e. large intestines
Use the following information to answer the question(s) below. Big Bend National Park in Texas is mostly Chihuahuan desert, where rainfall averages about 10 inches per year. Yet, it is not uncommon when hiking in this bone-dry desert to encounter mosses and ferns. One such plant is called "flower of stone." It is not a flowering plant, nor does it produce seeds. Under arid conditions, its leaflike structures curl up. However, when it rains, it unfurls its leaves, which form a bright green rosette on the desert floor. Consequently, it is sometimes called the "resurrection plant." At first glance, it could be a fern, a true moss, or a spike moss. What feature of both true mosses and ferns makes it most surprising that they can survive for many generations in dry deserts?
A. flagellated sperm B. lack of vascular tissues C. lack of cuticle D. lack of true roots E. a gametophyte generation that is dominant
Fungi contact and absorb food through the ________, a branching network of ________
A) mycelium; hyphae B) hyphae; mycelia C) mycorrhiza; mushrooms D) mushroom; hyphae