Biology Questions
Explore questions in the Biology category that you can ask Spark.E!
Are early cell divisions in mammals slow or fast and how long do they take?
Nearly everything the embryo needs during its first stages of development comes from the ______?
Placental mammals have a pattern of gastrulation similar to that of ________ and _____?
What are cytoplasmic factors?*****
In amphibians, are the cytoplasmic contents of the egg distributed homogeneously?
What is cytoplasmic rearrangement initiated by and who contributed this to the zygote (egg/sperm)? (AMPHIBIANS)
If you were to measure the height of every lima bean in a bag, what do you expect the graph to look like? Is this a polygenic trait or single - gene trait? How do you know?
What taxonomic level is a chordata? What do all chordates have in common
there is a total of 50 alleles. There are 20 black alleles and 30 brown alleles. What are the allele frequencies of each in the population?
If the relative frequency of the black allele decreased in the gene pool, what would happen to the relative frequency of the brown allele?
When the members of two populations cannot interbreed and produce fertile offspring, what has occurred?
Does natural selection act on phenotypes or genotypes?
List two natural disasters that might result in a small number of individuals from a population becoming and remaining isolated from the rest of the population. Which mechanism of evolution is this?
What is the correct sequence of these major events in the origin of life?Use "<" to mean "before", "=" to mean "simultaneously with", and ">" to mean "after"Formation of protocells (protobionts)Synthesis of organic monomersSynthesis of organic polymersDevelopment of a hereditary mechanism
The rock pocket mouse environment was originally sandstone, and the dark lava flows formed ~1.7 x 106 years ago. Due to mutation alone, how many dark mutant mice could have been born since the lava flow formed?
If the probability of a dark mutant appearing is 1 in 25,000,000 mice, and the number of mice born per year is 25,000 mice/year, on average, one new dark mutant should appear every:
Evolution results in a better match of an organism and the environment.
What will happen to a population of snakes if the small mice they normally eat are no longer available and all that is left are larger rats that are more difficult to swallow?
Speciation can only be observed over millions of years
Imagine two separate populations of mice at sites A and D below. What would be the effect of gene flow between these two populations?