Based on the phylogeny shown, choose the true statement about evolutionary relationships.
A. Oak is equally related to rose and pine.
B. Fern is equally related to ginkgo and oak.
C. Ginkgo is more closely related to oak than rose.
D. Fern is more closely related to pine than to rose.
Answer: B
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You are surveying biodiversity on a new island chain. You have counted the number of bat species on one island already. The next island is smaller and farther from the mainland than the one you have just surveyed
According to the theory of island biogeography, the total number of its bat species should be ____ than on the current island because the rate of immigration to the new island should be ____ and the rate of extinction should be ____ . Refer to Figure 46.17 in your text for help. Fill in the blank with the appropriate word.
Cells are often ground up with abrasive to get to their internal enzymes/molecules, followed by removal of the abrasives. Here are three situations and three outcomes. What is the correct interpretation of the results?
In situation #1, radioactive amino acids are added to cell material, and radioactive proteins are produced. In situation #2, radioactive amino acids, cell material, and the enzyme DNAse (degrades DNA) are added together. Radioactive proteins are still produced. In situation #3, the ground-up cell material is allowed to sit for 24 hours before radioactive amino acids and DNAse are added to it. No radioactive protein is produced. What is the most likely interpretation? A. RNA polymerase has no activity after 24 hours, so no mRNA is transcribed and translated into radioactive proteinsin the last scenario. B. The radioactivity in the amino acids is altering/degrading the tRNA molecules, leading to no protein production in the last scenario. C. Natural RNAses present in the ground-up material will degrade any existing mRNAs in that 24-hour interval. Added DNAses breakdown DNA so that new RNAs are not synthesized.This will lead to a loss of capability to translate protein in the last scenario. D. The results are not interpretable from the information given.
What are the finger bones called?
a. carpals b. metacarpals c. phalanges d. coxals
Which activity could help you to slow the rate of global warming?
A) only buy food in plastic containers B) drive faster than the speed limit C) replace an old refrigerator with a new one D) mow the grass more frequently