BIO120H1 Study Guide - Midterm Guide: Corm, Agave Americana, Fruit Preserves

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ambergoldfish214

14 May 2012

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Able to fly long distance, flies with wind. Broad geo range, narrow eco range (stays in grasslands) Gila woodpecker doesn"t use the same hole twice. Expanded range in decades, adapted to living with humans. Makes hay in summer, eats it in winter. Keeps cool in desert (vascularisation, blood vessels exposed to cooling) Long thin, loses heat fast (fitness cost), stays in warmer climates (n america) Small body allows better hunting (prey = thomomys talpoides) (fitness gain) Kidneys ( concentrated urine, saves water physiology!) Stuffs cheeks (food absorbs water vapour behavioural!) On santa rita prickly pear (extreme, leaves = spines, protects water) Accordion-pleated trunk (can swell up and absorb 800l in one storm) Nurse tree effect its seedlings = sheltered by palo verde. Import nutrients through animals (ants & frogs, pee) Swim back to where they were born orgy lay lots of eggs die. Grows decades spasm of repro die. Semelparity could be selected by pollinator, preference for larger.

Related Questions

The broad-leafed cattail (Typha latifolia) is found inabundance in freshwater habitats, and the narrow-leafed cattail(Typha angustifolia) is commonly restricted to more salinehabitats. Two alternative hypotheses have been proposed to accountfor these patterns of distribution. The first hypothesis is thatT. latifolia is a specialist in freshwater habitats andT. angustifolia is a specialist in saline habitats. Theother hypothesis is that T. latifolia is a specialist infreshwater habitats, but T. angustifolia is a generalistand could exploit freshwater habitats, but is prevented from doingso due to competition from T. latifolia. Describe thestudy you would design to distinguish between these twohypotheses.

scarletreindeer93

Kangaroo rats are endemic to the deserts of the American southwest.In one region, two kangaroo rat species eat only seeds and arebiologically extremely similar. The two species are found inadjacent habitats. Seeds are abundant in both habitats, but lessnutritious than insects. If you were to double the amount of seedsacross both habitats and add insects as potential food, which ofthe following outcomes would most likely result?

A)One species will change its food preferences to eat insects andthe two species will coexist across both habitats.
B) Because of the abundance and diversity of food available, bothspecies will coexist across both habitats.
C) Both species will switch their diets to the more nutritiousinsects and one will exclude the other from both habitats.
D) No change will occur; the abundance and diversity of resourcesdoes not determine the ultimate outcome of competition if nichesremain the same.

ochremole532

Q5. Kangaroo rats are endemic to the deserts of theAmerican southwest. In one region, two kangaroo rat species eatonly seeds and are biologically extremely similar. The two speciesare found in adjacent habitats. Seeds are abundant in bothhabitats, but less nutritious than insects. If you were to doublethe amount of seeds across both habitats and add insects aspotential food, which of the following outcomes would most likelyresult?

Q7. If, over evolutionary time, one of the two kangaroo ratspecies from Question 5 (without a third species present) were toevolve a change in food habits such that it eats only insects.Which of the following would most likely happen

A. It would outcompete the other species because insects aremore nutritious than seeds.

B. The other species would outcompete it because seeds are moreabundant than insects

C.Both species would share both habitats because their nicheswould be different and competition would thus be eliminated.

D. One species would outcompete the other, but which speciesdoes so will be determined by random chance

violetlocust311

BIO120H1 Study Guide - Midterm Guide: Corm, Agave Americana, Fruit Preserves

BIO120H1 Full Course Notes

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