What makes a sample representative? A representative sample is a subset of a population that seeks to accurately reflect the characteristics of the larger group. For example, a classroom of 30 students with 15 males and 15 females could generate a representative sample that might include six students: three males and three females. What percentage […]
What are the 3 types of genetic variation?
What are the 3 types of genetic variation? For a given population, there are three sources of variation: mutation, recombination, and immigration of genes. What would happen if there was no genetic variation? Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk […]
Does Salt stay dissolved in water?
Does Salt stay dissolved in water? When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together. What is the solution of salt and […]
How much energy does a 50 kg rock have if it is sitting on the edge of a 15 m cliff?
How do you reduce standing waves?
How do you reduce standing waves? Low end sounds create standing waves when the reflected sound between walls is directly opposite in phase. By cutting the frequency, you can eliminate the problem. What are the effects of harmonics? Effects of harmonics in the power system Increase in installation and utility costs. Downtime and loss of […]
What does G G mean in genetics?
What does G G mean in genetics? Organisms that have two different alleles for a gene are called heterozygous (Gg). The offspring of the cross between the GG (homozygous dominant) and gg (homozygous recessive) plants are all heterozygous for the pod color gene. What does C stand for in DNA? The instructions in a gene […]
How does the body farm get bodies?
How does the body farm get bodies? The bodies typically come from Texas hospitals, funeral homes, or medical examiners’ offices; from there, they are strapped to a gurney, loaded into cargo vans, and brought to the ranch, where researchers and student volunteers begin their research on the corpses. What is the basic purpose of a […]
Did Pony Express riders carry a Bible?
Did Pony Express riders carry a Bible? The Pony Express Bible is a Protestant Bible that was distributed to the Pony Express riders by the operators of the company in 1860 and 1861. In addition, the riders were required to sign pledges related to upholding their behavior according to specified Christian principles. Who died on […]
What two seasons begin on an equinox?
What two seasons begin on an equinox? More specifically, the start of each season is marked by either a solstice (for winter and summer) or an equinox (for spring and autumn). A solstice is when the Sun reaches the most southerly or northerly point in the sky, while an equinox is when the Sun passes […]
Why is SI easier than the English system?
Why is SI easier than the English system? There are several reasons why SI is preferred to the old English system of measurement: SI uses base 10, just like our number system, so it is much easier to learn, remember and convert between units. The prefixes used in SI are from Latin and Greek, and […]