11. The Wood frog starts before the leopard frog so this means that they do not interact except in the end and beginning of wood frog and leopard frog.
I believe that the best answer among the choices provided by the question is <span>D) A study by Dr. Birde showed that the number of songbirds in her yard increased due to a modified food source.</span>
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Answer:
Deserts, Beaches and other sandy environments :)
Explanation:
Answer:
The cross between rrff and RrFF does not produce any F1 offspring with the genotype, Rrff, therefore the probability that the F1 offspring will have red pear shaped fruit (Rrff) is: c. 0%
Given the following:
- Allele for red fruit color - (R) - dominant
- Allele for yellow fruit color - (r) - recessive
- Allele for round shaped fruit (F) - dominant
- Allele for pear shaped fruit (f) - dominant
A tomato plant that has a yellow pear shaped fruit will be - rrff
A tomato plant that is a heterozygous red fruit and is h0m0zygous round shaped fruit will be: RrFF
The cross between both parents (rrff × RrFF) is shown in the Punnett Square attached below.
F1 offspring that will have red pear shaped fruit will have the genotype as, Rrff.
Thus, the cross between rrff and RrFF does not produce any F1 offspring with the genotype, Rrff, therefore the probability that the F1 offspring will have red pear shaped fruit (Rrff) is: c. 0%
Learn more about Punnett Square on:
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Let's start off with an example. Imagine a population of organisms—let's say, deer—with access to a fixed, constant amount of food. When the population is small, the limited amount of food will be plenty for everyone. But, when the population gets large enough, the limited amount of food may no longer be sufficient, leading to competition among the deer. Because of the competition, some deer may die of starvation or fail to have offspring, decreasing the per capita—per individual—growth rate and causing population size to plateau or shrink.
In this scenario, competition for food is a density-dependent limiting factor. In general, we define density-dependent limiting factors as factors that affect the per capita growth rate of a population differently depending on how dense the population already is. Most density-dependent factors make the per capita growth rate go down as the population increases. This is an example of negative feedback that limits population growth.
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