A new organism is discovered in the forests of Costa Rica. Scientists there determine that the polypeptide sequence of hemoglobin from the new organism has 72 amino acid differences from humans, 65 differences from a gibbon, 49 differences from a rat, and 5 differences from a frog. These data suggest that the new organism

Which of the following chordate characteristics contributes most to the formation of your ears?

A molecule that is phosphorylated

When a molecule of NAD+ (nicotinamide adenine dinucleotide) gains a hydrogen atom (not just a proton), the molecule becomes

The adaptation that freed vertebrates from water for reproduction and allowed them to radiate into diverse terrestrial environments was the _____.

A transcription unit that is 8,000 nucleotides long may use only 1,200 nucleotides to make a protein consisting of approximately 400 amino acids. This is best explained by the fact that

The primary function of DNA molecules is to

How is the process of natural selection different from that of artificial selection?

The following is a list themes that we find throughout all of biology and that are discussed in Chapter 1. Use them to answer the following questions.1 New properties emerge at successive levels of biological organization.2 From ecosystems to molecules, interactions are important in biological systems.3 Life requires the transfer and transformation of energy and matter.4 Structure and function are correlated at all levels of biological organization.5 Cells are an organism’s basic units of structure and function.6 Life’s processes involve the expression and transmission of genetic information.7 Evolution, the core theme of biology.Which theme(s) is/are illustrated when a biology class is comparing the rates of photosynthesis between a flowering plant and a fern?

A math teacher wants to create a relative frequency table. The frequency table shows the five classes (grade intervals) his math students earned on a recent exam. What relative frequency would represent the frequency shown for those students who earned a B on the exam? prob 18.png