The process by which pollen is transferred to the ovule is called
(a) transmigration.
(b) fertilization.
(c) pollination.
(d) all of the above.
(c) pollination.
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Water has many unique properties. Can you identify the property of water that is responsible for each of the following observations?
a. Many insects, such as the water strider, are able to move across the surface of water. b. Most people get chilled immediately after taking a shower. c. A dime can be made to "float" on the surface of a glass of water. d. The dime will sink if salt is added to the water. e. On cold days, the water temperature is often warmer than the surrounding air. f. Ice forms on the surface of lakes and rivers. g. Many salts dissolve in water. h. Many oils will not dissolve in water. i. The coastal areas of the world have a climate that is more moderate than inland areas. j. Some springs contain high amounts of arsenic. k. The Great Salt Lake contains high quantities of mineral solutes.
Calcium levels are primarily under the control of
a. calcitonin and thyroxine. b. parathyroid hormone and calcitonin. c. prolactin and oxytocin. d. parathyroid hormone and thyroxine. e. progesterone and ADH.
Factors that affect the final amount of stored energy in an ecosystem include all of the following
EXCEPT a. the size of the producers. b. the availability of mineral nutrients. c. how much sunlight and rainfall are available during a growing season. d. the temperature range. e. the type of decomposers.
Which of the following is a correctly written scientific name?
A) Homo sapiens B) Acer pensylvanicum C) musca domesticus D) Australopithecus afarensis