Answer the following question given this paragraph: As the atoms approach one another, their electron clouds gradually begin to overlap. Now there are several interactions which begin to occur. One is that the single electrons that each hydrogen atom possesses begin to repel each other. This repulsive force would tend to make the potential energy of the system increase. However, the electron of each atom begins to be attracted to the nucleus of the other atom. This attractive force tends to make the potential energy of the system decrease. Q: As the atoms approach one another, their electron clouds gradually begin to do what? Choices: - magnetize - shrink - disappear - overlap A:
overlap
Answer the following question given this paragraph: Nitrogen Oxyacids and Salts Nitrogen pentaoxide, N2O5, and NO2 react with water to form nitric acid, HNO3. Alchemists, as early as the eighth century, knew nitric acid (shown in Figure 18.50) as aqua fortis (meaning "strong water"). The acid was useful in the separation of gold from silver because it dissolves silver but not gold. Traces of nitric acid occur in the atmosphere after thunderstorms, and its salts are widely distributed in nature. There are tremendous deposits of Chile saltpeter,. Q: Alchemists, as early as the eighth century, knew nitric acid as aqua fortis, which means? Choices: - isolated water - clean water - applied water - strong water A:
strong water
Q: Answer the following question given this paragraph: Reverse transcription also occurs with retrotransposons and during telomere synthesis in eukaryotes. Retrotransposons are self-replicating segments of eukaryotic genomes that use reverse transcriptase to move from one position in the genome to another via a RNA intermediate. A telomere is a region of repetitive noncoding nucleotide sequences at each end of a chromosome. These sequences protect the end of the chromosome from deterioration or from fusion with neighboring chromosomes. Each time DNA is replicated, small segments of DNA from the ends of the chromosome is lost. Telomerase is a reverse transcriptase that uses an RNA intermediate to elongate the 3' end of DNA strands in the telomere regions after each replication cycle. Q: What is a region of repetitive noncoding nucleotide sequences at each end of a chromosome? Choices: - diploid - cellular - cytoskeleton - telomere A:
A: telomere
Question: Answer the following question given this paragraph: Penguins do not use their wings, known as flippers, to fly in the air. However, they do use them to move in the water. The theory of evolution suggests that penguins evolved to use their wings for a different purpose. A whale's pelvic bones, which were once attached to legs, are also vestigial structures. Whales are descended from land-dwelling ancestors that had legs. Q: What do you call structures like a whale's pelvic bones, which were once attached to legs, or wings that cannot be used for flight? Choices: - primitive - primordial - distinctive - vestigial A:
Answer: vestigial
*Question*
Answer the following question given this paragraph: Q: What organ contributes about 60% of the volume of semen ? Choices: - complete vesicles - cilia - long vesicles - seminal vesicles A:
**Answer**
seminal vesicles
*Question*
Answer the following question given this paragraph: The life sciences are the study of living organisms. They deal with every aspect of living organisms, from the biology of cells , to the biology of individual organisms, to how these organisms interact with other organisms and their environment. Q: What sciences are the study of living organisms? Choices: - physical sciences - earth sciences - social sciences - life sciences A:
**Answer**
life sciences