A genus of primarily wind-pollinated plants includes one unusual species that has evolved to be pollinated by insects. Several morphological changes have accompanied this adaptation. The ________ are more colorful, there is a nectary at the base of the ________, the ________ are shorter and produce sticky pollen, and the ________ are stickier for enhanced pollen capture.
A. petals; stamens; sepals; carpels
B. stamens; carpels; petals; sepals
C. petals; sepals; carpels; stamens
D. petals; sepals; stamens; carpels
Answer: D
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Which of the following statements is true?
a. Chromosomes are classified into two categories, the sex chromosomes that determine gender and autosomes that determine non-gender related traits. b. Homologous chromosomes differ in banding patterns, the traits they code for and size. c. While sex chromosomes determine different genders they look the same until they are stained. d. In humans all 46 chromosomes have an identical match called the homologue.
To date, humans have interfered with all of the biogeochemical cycles on Earth, but this interference has been of the
greatest magnitude, in terms of human-induced changes in climate, in the:a. hydrologic cycle. b. nitrogen cycle. c. carbon cycle. d. sulfur cycle. e. phosphorus cycle.
The proposed advantages of bipedalism, which characterizes hominin evolution, include making it easier to
A. travel and move about. B. collect food from overhead. C. carry their young from place to place. D. carry food back to their camp or their young. E. All of these are correct.