Biomolecules
Genetics
Evolution
Interdependence of body systems
Ecology
100
Which component of the DNA molecule provides instructions for the production of the protein? A The phosphate groups B The sugar molecules C The sequence of nitrogen bases D The bonds that hold the sugars to the bases
C The sequence of nitrogen bases
100
Which components of DNA are referred to as the genetic code? F Phosphate groups G Nitrogenous bases H Deoxyribose sugars J Hydrogen bonds
G Nitrogenous bases
100
A species of flower lives in an environment that has always had an abundance of rain but is now experiencing less rainfall each year. Which variation within the flower population would be beneficial in terms of natural selection? A a difference in pollen production B a difference in the color of petals C a difference in the length of the roots D a difference in the length of the stems
C a difference in the length of the roots
100
Which body systems work together to protect the body from pathogens? F Muscular and vascular G Digestive and excretory H Circulatory and immune J Endocrine and reproductive
H Circulatory and immune
100
Which are typical pioneer species during primary succession? F trees G shrubs H lichens J grasses
H lichens
200
Which of these statements best explains how genes and proteins are related? F Genes are segments of DNA that code for proteins. G Proteins are segments of DNA that code for genes. H Genes are the building blocks of proteins. J Proteins are the building blocks of genes
F Genes are segments of DNA that code for proteins.
200
How does DNA in cells determine an organism’s complex traits? A DNA contains codes for proteins, which are necessary for the growth and functioning of an organism. B DNA separates into long single strands that make up each part of an organism. C DNA produces the energy an organism needs in order to grow. D DNA folds into the nucleus of each of the cells of an organism.
A DNA contains codes for proteins, which are necessary for the growth and functioning of an organism
200
Which of these arthropods are most closely related? A Arthropods of the same family B Arthropods of the same class C Arthropods of the same genus D Arthropods of the same species
D Arthropods of the same species
200
A person who is cold shivers to generate body heat. Which of the following lists the primary body systems that interact to maintain homeostasis in this situation? A nervous, excretory, and respiratory B excretory, digestive, and respiratory C digestive, muscular, and circulatory D muscular, circulatory, and nervous
D muscular, circulatory, and nervous
200
Muskrats are omnivores that live in burrows on the pond banks. Which of the following would most likely lead to an increase in the size of the muskrat population over time? A increased seed production by cattails B increased outbreaks of disease in muskrats C increased numbers of predators on muskrats D increased amounts of competition from pickerel
A increased seed production by cattails
300
A strand of DNA has a nucleotide base sequence of TAC-CGG-AGT. Which of the following is the complementary mRNA nucleotide sequence produced from the strand of DNA? A UAC-CGG-AGU B ACU-GAA-CGA C AGU-UCC-UAC D AUG-GCC-UCA
D AUG-GCC-UCA
300
Which of these best explains how mutation can be beneficial to an organism? A Phenotypic change may create an advantage over other organisms. B Recombined genetic material improves genotype stability. C Mitosis becomes a favored means of reproduction. D Deoxyribose sugars develop into additional nucleotides.
A Phenotypic change may create an advantage over other organisms.
300
The scientific name for the cougar is Puma concolor. Which of the following organisms is most closely related to the cougar? A Corythaixoides concolor B Lynx rufus C Panthera tigris D Puma yagouaroundi
D Puma yagouaroundi
300
Which system controls many of the other body systems involved in homeostasis? F the urinary system G the nervous system H the cardiovascular system J the lymphatic system
G the nervous system (CNS- central nervous system includes the brain!)
300
About 10% of the energy at one trophic level is passed to the next level. What usually happens to the energy that is not passed to the next trophic level or used to carry out life processes? A It is given off as heat. B It is stored as vitamins. C It is used in reproduction. D It is used in protein synthesis.
A It is given off as heat.
400
Which of these best describes the correct sequence in the expression of a trait? F trait ? gene ? enzyme G gene ? protein ? trait H protein ? gene ? trait J gene ? trait ? DNA
G gene ? protein ? trait
400
A mutation is least likely to affect a cell when the mutation — A reverses the order of bases in a DNA strand B allows the total number of bases in a DNA sequence to remain the same C replaces a base with its complementary base D produces a triplet that codes for the same amino acid as the original triplet
D produces a triplet that codes for the same amino acid as the original triplet
400
Which must be true of any scientific hypothesis? A must be testable B must undergo peer review C must be approved by professionals D must be proven correct by research
A must be testable
400
Most non-vascular plants are small because they — F can only transport water short distances. G have thick leaves. H usually grow in deserts. J are unable to perform photosynthesis
F can only transport water short distances.
400
Yeast cells obtain energy under anaerobic conditions through the process of F photosynthesis. G cell differentiation. H cellular respiration. J alcoholic fermentation.
J alcoholic fermentation.
500
Bacteria cells reproduce by binary fission, a type of asexual cell division. One advantage of binary fission is — F greater genetic variation in daughter cells. G the ability to reproduce quickly. H greater resistance to disease. J the ability to live under anaerobic conditions.
G the ability to reproduce quickly.
500
If several pea plants with the genotype TTYy are crossed with pea plants with the genotype Ttyy, what percentage of the offspring will be expected to have the TTYy allele combination? A 25% B 40% C 50% D 75%
A 25%
500
Which of the following is a true statement about evolution? A Individuals evolve more slowly than populations. B Individuals evolve; populations do not. C Individuals evolve by changing the gene pool. D Populations evolve; individuals do not.
D Populations evolve; individuals do not.
500
Vascular plant:nonvascular plant; cactus: — F fern. G moss. H palm tree. J oak tree.
G moss.
500
In an ecosystem, elements such as nitrogen and carbon move between living things and the environment. The conversions of these elements are part of — F biogeochemical cycles. G ecological succession. H energy pyramids. J symbiotic relationships.
F biogeochemical cycles.
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