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!