DNA is like abook titled How to Be a Cell. Explain why that title is appropriate for each of DNa’s three functions.
Which statement BEST describes how mutations are related to evolution? A) There is not a strong relationship between mutations and evolution. B) Natural selection causes evolution, which causes more mutations to appear in the DNA of the species. C) Mutations are changes in DNA that produce weaker organisms that die, so these are eliminated by […]
You are reading culture plates today and identifying pathogens that grow from patient samples. Which two pieces of information are absolutely critical in determining which additional tests must be done to identify the pathogen?
Determine the concentration of a salt solution where there is no change in mass. Please explain.
Select all of the true statements about surface currents. A. They form gyres. B. They transport heat across Earth’s surface. C. They are known as “thermohaline circulation.” D. They are caused by wind and Earth’s rotation. E. They are driven by density differences in the water. F. They take hundreds to thousands of years to […]
Which statement describes a reason why stem cell research is important? A. It allows scientists to mix the genes of different organisms to produce desired traits. B. It allows scientists to put healthy genes in cancer cells. C. It investigates the use of undifferentiated cells to cure disease. D. all of the above
Coiling of shells can vary for snails. Snails that coil to the left cannot mate with snails that coil to the right. This difference leads to reproductive isolation. What kind of reproductive isolation does this example indicate? a.mechanical isolation b. postzygotic isolation c.gametic isolation d.behavioral isolation
Which human practice can cause flooding? A) white water rafting B) tubing C) walling off rivers D) picnics E) dredging water beds
Which statement describes littoral zones? A) It is where the land meets the water. B) It occurs in the transition zone between water and dry land. C) It has vegetation. D) It stabilizes the soil. E) All of the above
A parent carries a deletion on one of the two homologous chromosomes carrying the gene. What is the probability of this individual’s child carrying the same deletion?
