Answer the following questions true (T) or false (F)
1. Animal cells are surrounded by a cell wall.
2. The central vacuole is used for nutrient storage and photosynthesis in plant cells.
3. Ribosomes are found only in plant cells.
1. FALSE
2. FALSE
3. FALSE
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Recall that, through respiration, organisms release the energy contained in organic compounds. This energy, in turn:
A. increases as it moves through the upper levels of a trophic pyramid. B. increases as it moves through the upper levels of a food web. C. moves in a bi-directional manner between the levels of a food web. D. moves in a bi-directional manner between the levels of a trophic pyramid. E. decreases as it moves through the upper levels of a trophic pyramid. F. decreases as it moves through the upper levels of a food web.
Four of the five choices listed below are
characteristics of mutations. Select the exception. a. predictable b. harmful or beneficial c. random d. effects depend upon environment e. heritable
Which group of plants have phloem and xylem but lack seeds, flowers, and fruit?
A. liverworts, hornworts, and mosses B. ferns, club mosses, horsetails, and whisk ferns C. ginkgo, cycads, conifers, and gnetophytes D. monocots and eudicots E. All plants have phloem and xylem but lack seeds, flowers, and fruit.
During cytokinesis in an animal cell, a constricting ring pinches the dividing cell into the two daughter cells. This contractile ring is formed by which of the following structures?
a. Centrioles b. Microtubules c. Microfilaments d. Z discs e. The spindle apparatus