Answer the following question given this paragraph: Q: The eyes of all vertebrates possess a single one of these structures? Choices: - vessel - sty - stalk - lens A:
lens
(Question)
Answer the following question given this paragraph: Unsafe drinking water causes 88% of diseases worldwide. In many nations, these diseases are the leading cause of death in children under the age of five. More than 14,000 people die every day from such diseases. Cholera is caused by bacteria. A person gets guinea worm from drinking the guinea worm larvae ( Figure below ). The cholera bacteria and guinea worms are pathogens. Q: What is cholera? Choices: - protein - energy - glucose - bacteria A:
(Answer)
bacteria
Ques: Answer the following question given this paragraph: Scientists did not actually see viruses for the first time until the 1930s. That's when the electron microscope was invented. The virus shown in Figure below was the first one to be seen. Q: Scientists did not actually see viruses until what was invented? Choices: - magnifying glass - electronic scale - telescope - electron microscope A:
Ans: electron microscope
(Q).
Answer the following question given this paragraph: You have learned that an allele is an alternative form of a gene. Most, if not all genes have alternative forms causing the resulting protein to function slightly differently. But are there alleles that cause proteins to function dramatically differently or not function at all? A mutation is a change in the DNA or RNA sequence, and many mutations result in new alleles. Some mutations have no effect on the protein, whereas others are either beneficial or harmful. In fact, evolution could not take place without the genetic variation that results from beneficial mutations. In humans, harmful mutations can result in genetic diseases. There are also chromosomal mutations, large changes with dramatic effects. See Mutations are changes in genetic information at http://www. dnaftb. org/27/animation. html for a description of the early work on mutations. Q: An allele is an alternative form of what structure? Choices: - amino acid - enzyme - protein - gene A:
(A).
gene
Ques:Answer the following question given this paragraph: Chromosome Structural Rearrangements Cytologists have characterized numerous structural rearrangements in chromosomes, including partial duplications, deletions, inversions, and translocations. Duplications and deletions often produce offspring that survive but exhibit physical and mental abnormalities. Cri-du-chat (from the French for "cry of the cat") is a syndrome associated with nervous system abnormalities and identifiable physical features that results from a deletion of most of the small arm of chromosome 5 (Figure 7.11). Infants with this genotype emit a characteristic high-pitched cry upon which the disorder's name is based. Q: Structural rearrangements of what include partial duplications, deletions, inversions, and translocations; duplications and deletions often produce offspring that survive but exhibit physical and mental abnormalities? Choices: - neutrons - phenotypes - cells - chromosomes A:

Ans:chromosomes
Ques: Answer the following question given this paragraph: An obstacle or opening that is shorter than the wavelength causes greater diffraction of waves. Q: An obstacle or opening that is shorter than the wavelength causes greater diffraction of what? Choices: - tides - ranges - particles - waves A:
Ans:
waves