Among a species of tropical birds, 30 out of every 50 birds are female. If a certain bird sanctuary has a population of 1,150 of these birds, how many of them would you expect to be female?
Among a species of tropical birds, 30 out of every 50 birds are female. If a...
Section 4: Sex ratio variation You want to test whether the sex ratio for a species of birds is constant, or if there can be variation among nests in the probability that a chick is female. To do this, you look at nests with 3 chicks in them, counting the number of females in each. You obtain the results in the table below. Number of female chicks in nest Number of nests 32 23 65 33 A) What are the...
Resplendent quetzal (Pharomachrus mocinno) is a beautiful bird species that lives in the tropical forests of Central America. Assuming that you started a breeding program and you would like to breed resplendent quetzal to produce longer tails. You measured 50 resplendent quetzals and obtained a mean tail length of 85.4 cm. You selected 10 resplendent quetzals with longest tails as breeders. The mean tail length of the breeders is 91.2 cm. After mating, offspring of the resplendent quetzal breeders have...
Page 2 7. In a species of non-poisonous butterfly species are avoided by predatory birds: individuals that are intermediate closely match either of the two poisonous species are readily eaten by predators. This isanampe tropical butterfly, individuals that resemble one or the other of two poisonous in appearance and do not a. directional selection b. stabilizing selection c. disruptive selection d. genetic drift e. gene flow 8. An evolutionary process that reduces among-population genetic variation genetic variation is: but increases...
Exercise: Many older classifications are not monophyletic, and do not reflect the evolutionary relationships among species. As an introduction to phylogenetic classification, think about the tetrapods (animals with four legs). These animals have traditionally been classified into four groups, all of the same rank: Class Amphibia (frogs, salamanders, newts, etc.) Class Reptilia (snakes, lizards, crocodiles, turtles, etc.) Class Aves (birds) Class Mammalia (mammals) Reptiles possess a common ancestor with certain extinct amphibians, the birds are derived from a group of...
You know that overall there is a 60% chance to observe birds engaging in a specific mating dance. You want to study this dance, so you need to know how many birds to observe to have a good chance to see it. How many birds would you need to observe to have a 95% chance of observing the dance? Let’s say your previous research has also shown that the same species in Florida dances for 8 minutes on average, with...
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1. (a) A certain species of bird always lays 3 eggs in the spring, but it is not guaranteed that all of the eggs it lays will hatch. Scientists think that a model for the nunber, X, of eggs that hatch has a probability distribution given by 0 where θ is a parameter to be estimated. i) Given that at least one egg hatches, determine the probability that all three eggs in a nest hatch. 2 marks...
Female birds who practice polyandry might see benefits if they obtained genes from several partners who are particularly compatible with the genes in their eggs. If the preceding sentence is a hypothesis, what prediction follows? (2 marks) Typically, females in the population will mate with the same very few males. The males chosen as reproductive partners will vary substantially from female to female. Males of this particular species are more likely to exhibit lek polygyny. Females exhibiting polyandry will obtain...
6 6) You observe a species of wasp that has the following distribution of lifetime reproductive success for males and females in a population. Would you expect the males or the females to have evolved to be more selective in choosing a mate based on the data? Explain your answer. (4 points) 0 n 25 o 20 O 15 ち10 ■ Females Males 0 10 20 30 40 50 60 70 80 Total number of offspring
6 6) You observe...
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Environmental scientists believe that there is a decline in the population of frogs around the world. They speculate that declining frog populations are a symptom of deteriorating environmental conditions. How would these scientists gather accurate data about existing frog populations? How would they use these data to speculate on previous or future population levels? Imagine that a wetland you are studying has a population of 5000 frogs, including bullfrogs, spring peepers, and mink frogs. The populations...
can all there be answered please. intro to ecology and evolution 1. Chickadees and titmice are two bird species that are common around campus. In winter, they often forage together in flocks. Members of these flocks make alarm calls when predators, especially hawks, are nearby. Give a plausible hypothesis to explain why these birds make alarm calls that benefit members of another species. 2. A farm pond that's never been fished has 100 fish in it in 2018, which you...