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Title: help please Post by: pp_4188 on Mar 24, 2011 Which of the following pairs represents ecological equivalents?
a) squirrel and rattlesnake b) house cat and lion c) seagull and codfish d) wild horse and zebra e) phytoplankton and zooplankton The most significant adaptation of succulent plants to arid environment is the a) low surface-to-volume ratio of above-ground organs b) accumulation of H70 in the cells c)formation of highly dissected leaves d) absense of stomata e) production of nonpigmented cuticles All the following statements are true about phototropism EXCEPT a) phototropism results from unequal rates of growth b) phototropism results from a difference in cell division and cell elongation c) phototropism occurs only when the tip of the stem is present d) phototropism is due to auxin produced in the tip of the stem e) phototropism occurs because the auxin hinders cell growth in the actively growing area Factors that play a role in determining an individual's rank in a dominance hierarchy include which of the following? I. physical condition II. experience III. gender a) I only b) II only c) I and II only d) II and III only e) I, II, and III Fossil birds had feathers long before birds flew. This is an example of a) an adaptation b) homology c) heterochrony d) a preadaptation e) polymorphism Many animals breed in spring in response to an environmental stimulus. The environmental stimulus is increasing day length and breeding is due to increased secretions of sex hormones, from the gonads. All of the following are part of the response pathway EXCEPT a) the environmentall stimulus is recieved by the brain b) the hypothalamus secretes a neurotransmitter c) the anterior pituitary (adenohypophysis) is stimulated by releasing hormones d) the anterior hypophysis releases gonadotropic hormones e) the gonadotropic horomones stimulate the gonads to produce sex hormones Oleander (Nerium oleander) is a xerophyte. Xerophytes live in very dry places and have which of the listedd characteristics? I. very thick cuticle II. single-layered epidermis on upper surface III. Sunken stomata on lower surface IV. Trichomes (epidermal hairs) surrounding the stomata a) I and II b) I, II, and III c) II and IV d) I, III, and IV e) II and III The 14 species of Darwin's finches on the Galapagos Islands are believed to have evolved from competing populations of an ancestral finch that colonized the islands from the South American mainland. If so, this would be an example of I. convergent evolution II. Adaptative radiation III. Founder effect a) I b) II c) III d) I and II e) II and III thank you! :) Title: Re: help please Post by: pp_4188 on Mar 25, 2011 hey guys i need these answered asap if anyone can please
thank u! Title: Re: help please Post by: duddy on Mar 25, 2011 Some answers
Which of the following pairs represents ecological equivalents? a) squirrel and rattlesnake b) house cat and lion c) seagull and codfish d) wild horse and zebra e) phytoplankton and zooplankton The most significant adaptation of succulent plants to arid environment is the a) low surface-to-volume ratio of above-ground organs b) accumulation of H70 in the cells c)formation of highly dissected leaves d) absense of stomata e) production of nonpigmented cuticles All the following statements are true about phototropism EXCEPT a) phototropism results from unequal rates of growth b) phototropism results from a difference in cell division and cell elongation c) phototropism occurs only when the tip of the stem is present d) phototropism is due to auxin produced in the tip of the stem e) phototropism occurs because the auxin hinders cell growth in the actively growing area Factors that play a role in determining an individual's rank in a dominance hierarchy include which of the following? I. physical condition II. experience III. gender a) I only b) II only c) I and II only d) II and III only e) I, II, and III Fossil birds had feathers long before birds flew. This is an example of a) an adaptation b) homology c) heterochrony d) a preadaptation e) polymorphism |