Which of the following describes the correct path of light in a compound light microscope, from the illumination source to the eye of the observer?
a. Condenser lenses ? prism ? specimen ? objective lenses ? body tube ? ocular lens ? eye
b. Ocular lens ? body tube ? condenser lens ? specimen ? objective lens ? prism ? eye
c. Objective lenses ? specimen ? condenser lenses ? body tube ? prism ? ocular lens ? eye
d. Condenser lenses ? specimen ? objective lenses ? body tube ? prism ? ocular lens ? eye
Answer: d. Condenser lenses ? specimen ? objective lenses ? body tube ? prism ? ocular lens ? eye
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Small pieces of DNA synthesized on the lagging strand are called ________.
Fill in the blank(s) with the appropriate word(s).
In both prokaryotes and eukaryotes, the start codon (or initiator codon) is ____, which codes for the amino acid ____
a. UGA; proline b. UUU; phenylalanine c. AAA; lysine d. ACG; threonine e. AUG; methionine
The animal in the above photograph was adversely
affected by __________ and is making a comeback thanks to __________. a. global cooling; heat producing chemical added to their diet b. sexually transmitted viruses; a new vaccine c. limited number of natural cavities; artificial nesting boxes d. high incidence of males being born; transplantation of females from other areas e. all of these
Which of the following is an accurate description of Mendel's Law of Segregation?
a) Individuals possess two copies of every gene in their somatic cells. b) Individuals can have different versions (alleles) of a gene in their somatic cells. c) When gametes are formed, there is only one copy of every gene in each gamete. d) Different pairs of homologous chromosomes will line up at the metaphase I plate independently from each other.