Question 21 Not yet answered Marked out of 1.00 Flag question Question text The first forms of life on Earth were ________. Select one: a. plants b. microorganisms c. birds d. dinosaurs Clear my choice Question 22 Not yet answered Marked out of 1.00 Flag question Question text A suggested and testable explanation for an event is called a ________. Select one: a. hypothesis b. independent variable c. dependent variable d. theory Clear my choice Question 23 Not yet answered Marked out of 1.00 Flag question Question text Which scientific concept did Charles Darwin and Alfred Wallace independently discover? Select one: a. mutation b. natural selection c. overbreeding d. sexual reproduction e. all of the above Clear my choice Question 24 Not yet answered Marked out of 1.00 Flag question Question text A error in DNA replication that goes unrepaired is a … Select one: a. chromosome b. chromatid c. mutation d. none of the above Clear my choice Question 25 Not yet answered Marked out of 1.00 Flag question Question text Which of the following organelles contain photosynthesis? Select one: a. mitochondria b. chloroplasts c. stroma d. endoplasmic reticulum e. all of the above Clear my choice Question 26 Not yet answered Marked out of 1.00 Flag question Question text The presence of membrane-bound organelles is characteristic of … Select one: a. prokaryotes b. viruses c. bacteria d. eukaryotes Clear my choice Question 27 Not yet answered Marked out of 1.00 Flag question Question text The process by which RNA is synthesized using DNA as a template is … Select one: a. replication b. transcription c. translation d. inspiration Clear my choice Question 28 Not yet answered Marked out of 1.00 Flag question Question text Which of the following occurs during replication? Select one: a. double stranded DNA is unwound by DNA helicase b. Single stranded DNA is stabilized c. DNA polymerase forms the daughter DNA d. all of the above Clear my choice Question 29 Not yet answered Marked out of 1.00 Flag question Question text Consider a cross between a homozygous dominant and heterozygous individual for a particular gene. Let’s call is gene X. What is the probability that any given offspring will be heterozygous for gene X? Select one: a. 100% b. 75% c. 50% d. 25% Clear my choice Question 30 Not yet answered Marked out of 1.00 Flag question Question text Which of the following is characteristic of plant but not animal cytokinesis? Select one: a. formation of two daughter cells b. formation of cleavage furrow c. formation of cell plate d. formation of actin ring e. none of the above Clear my choice Question 31 Not yet answered Marked out of 1.00 Flag question Question text Which of the following occurs during the S phase of interphase? Select one: a. sister chromatids separate b. DNA is replicated c. homologous chromosomes line up d. cleavage furrow forms e. all of the above Clear my choice Question 32 Not yet answered Marked out of 1.00 Flag question Question text Which type of reasoning is utilized in hypothesis testing? Select one: a. inductive b. deductive c. reduction d. production e. none of the above Clear my choice Question 33 Not yet answered Marked out of 1.00 Flag question Question text From which of the following are all steroids synthesized? Select one: a. fatty acids b. cholesterol c. glycerol d. production e. glucose Clear my choice Question 34 Not yet answered Marked out of 1.00 Flag question Question text Which of the following is characteristic of animals? Select one: a. heterotrophic b. eukaryotic c. embryonic development leading to a fixed body plan d. all of the above Clear my choice Question 35 Not yet answered Marked out of 1.00 Flag question Question text Which of the following is accurate concerning metabolic enzymes? Select one: a. usually protein in nature b. lower the activation energy for a specific reaction c. change the nature of the products d. A and B but not C e. all of the above Clear my choice Question 36 Not yet answered Marked out of 1.00 Flag question Question text Which of the following is characteristic of carbon? Select one: a. Carbon has a valance of 3 b. Carbon can form 4 chemical bonds c. carbon is found in all inorganic molecules d. carbon is found in carbohydrates but not lipids e. all of the above Clear my choice Question 37 Not yet answered Marked out of 1.00 Flag question Question text Which of the following organelles contains aerobic cellular respiration? Select one: a. mitochondria b. cytosol c. chloroplasts d. peroxisome Clear my choice Question 38 Not yet answered Marked out of 1.00 Flag question Question text Which of the following is hydrolyzed to provide kinetic energy for cellular work? Select one: a. ATP b. pyruvate c. glucose d. molecular oxygen Clear my choice Question 39 Not yet answered Marked out of 1.00 Flag question Question text Which of the following domains include plants and animals? Select one: a. bacteria b. archaea c. eukaryotes d. all of the above Clear my choice Question 40 Not yet answered Marked out of 1.00 Flag question Question text What are the building blocks of proteins? Select one: a. fatty acids b. amino acids c. nucleic acids d. all of the above Clear my choice