Biology Questions
Explore questions in the Biology category that you can ask Spark.E!
1. living species descend from earlier life forms2. natural selection is the mechanism of evolution.
You are driving up I-70 just west of Denver when you note the amazing rock stratification. The discrete layers look so sudden that it seems like each layer was caused by a unique event. You marvel at these patterns and recognize how George Cuvier could have thought
A population of African cichlids recently had a larger fish predator introduced into their environment. Following the introduction, researches noticed that the small cichlids are able to hide by fitting easily into small crevices to avoid being eaten whereas the large fish are too big to be consumed the bye predator. Which mode of selection is occurring in this population
Dispelled the notion of catastrophism: Argued that geologic processes shaped the Earth gradually and over a long timescale, thus changes between rock layers only appear sudden
This is usually used to transform bacteria I biology labs ?
Evidence of a shared common ancestry among organisms is provided by
California has a population of about 3,000 White-Crowned Sparrows. Off the coast, there are islands at varying distances, each with populations fo between 25-50. Limited gene flow is detected among populations. What would you predict the level of genetic differentiation to be between island populations and the mainland population based on gene flow?
The dentisty of bumps on pumpkins caries in a population based on the amount of potassium in the soul. The bumpier a pumpkin, the less likely it will be chosen to be a jack-o-lantern for Halloween, and therefore more likely to survive and reproduce. Could this population evolve by natural selection?
Non-synonymous mutations are likely to have a neutral effect on fitness
Genetic drift, as an evolutionary force, is stronger in large populations compared to small ones
HWE can only be maintained in a population if all of the assumptions are met
A loss-of-function mutation arises that is strongly deleterious (allele x). That mutation is selected against and, ultimately, purged from the population. According to the mutation-selection balance..
The probability of fixation of an allele subject to genetic drift depends on
Charles Darwin was not the first person to speculate that species can change Bia biological evolution
Which of the following was a point that the Biometricians and the Mendelians agreed on?
The pangolin is the only mammal with scales. Reptiles also have scales. Mammals and reptiles share common ancestor, therefore, pangolin and reptile scales are most likely an example of homology
The the heritability of a variable trait is zero, that means that genetic variation explains none of the variation of that trait.
Two species of grasshopper live in a an agricultural region that uses insecticides heavily. The spotted grasshoppers have a high mutation rate (µ=10^-4) while the striped grasshoppers have a low mutation rate (µ=10^-8). Which species would you predict will accumulate a beneficial allele first?
Independently derived the theory of evolution by natural selection and worked with Darwin to present this idea to the scientific community
A subspecies of tauntauns lived on the southern continent of Hoth. Due to increased activity on the planer, the average temperature warmed dramatically, and the icy homes of those creatures was destroyed within about 10 years. Out of the original population of about 10,000 only 42 remained. This is an example of?