According to thompsons stages for demographic

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1. According to Thompson’s stages for demographic transition, what stage was Italy at in 1998? a. Stage 1: later-age reproduction was just beginning to spread b. Stage 2: birth rates had begun to exceed death rates c. Stage 3: Selection was favouring the middle-aged d. Stage 4: Low birth rates were approximately matched by death rates 2. Food chains are typically short. Based upon current understanding, what factor is most likely to lead to longer food chains? a. A stable climate b. Higher primary productivity c. Greater top-down control
d. Fewer primary consumers 3. If the HOX gene from Ubx from the brine shrimp (Crustacean) Artemia is genetically engineered into a Drosophila embryo. What happens and why? a. The fly will grow legs instead of antennae because this gene was silenced in the insects millions of years ago b. The fly will develop two pairs of wings because Artemia Ubx gene is not silenced in the segment anterior to the wings c. The fly larvae will initiate development of legs on the abdomen as the Artemia Ubx does not surpass leg development d. The fly larvae will express anterior denticles and a hunchback phenotype because the Artemia Ubx gene will not be expressed 4. In Komodo dragons, unfertilized females can lay eggs that hatch and grow up male. If a random virgin female rafted to a new island and lived long enough she could found a new population by breeding with her own sons. If this happened, what is the probability of gene expression of a gene for yellow colour (p=0.1) in continental population, where brown (p=0.9) is being lost from the new population because of the founder effect? a. 0.1 b. 0.4 c. 0.81 d. 0.96 5. In the New Zealand mudsnail, Potamopyrgus, what is the nature of the asexual populations found in lakes? a. Asexual populations are comprised of many , genetically distinct clones, most at low frequency; asexuals are more widespread and common than sexuals. b. Asexual populations are comprised of a few different clones, each at moderate frequency ; asexuals are more common than sexuals, esp. in shallow water. c. Asexual populations are comprised of many different clones, most at low frequen cy ; asexuals are l ess common than sexuals, except in shallow water. d. Asexual populations are comprised of a few different clones, each at moderate frequency; asexuals are less common than sexuals overall. 6. Lynda Delph’a work on the dioceceous (separate sexes) plant Silene latfolia points to intriocus sexual conflict over flowering morphology. How is this conflict manifested? a. Males invest more in leafy vegetative structures than in flowers, making pollen highly limited b. Females are under selection for fewer, larger flowers, which is detrimental to offspring fitness when their sons inherit those genes
c. Pollen grains have an elaborate mixture of accessory peptides that are toxic to the female flower d. Males gain from having more attractive yellow flowers, but females are harmed by having too many pollinator vibes

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