Select the best answer for the question
18. A gene editing technology called CRISPR-Cas9 uses cellular machinery to change the cell's genetic material. How might this technology be useful in treating diseases like cancer?
A. CRISPR-Cas9 could remove any DNA damage caused by smoking
B. CRISPR-Cas9 could remove from patients the genetic mutations that cause a specific cancer before the cancer begins
C. CRISPR-Cas9 could act as an antioxidant in a person's cells, removing toxins that might otherwise damage DNA
D. CRISPR-Cas9 could be a substitute for chemotherapy

Which of the following is not a way in which a vascular plant's xylem and phloem are similar?

Research question: why are the carrots that grew on the left side of the garden larger than the carrots that grew on the right side of the garden? which hypothesis is based on this research question? a comparison of people with gardens to people without gardens will show who is likely to live longer. b. carrots are thought to be good for your eyesight and should be eaten regularly. c. carrots that are provided lots of sunlight grow to a larger size than carrots grown in the shade. d. eating fresh vegetables every day is a healthy thing to do.

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas