Wetlands improve water quality by _______. a. filtration b. distillation c. osmosis d. all of the above
Which statement is NOT true concerning transfer RNA? A) Transfer RNA is found in the cytoplasm of cells. B) Transfer RNA is one of three types of RNA found inside of a cell. C) Transfer RNA carries amino acids to the ribosome for use in making proteins. D) Transfer RNA has a 3 letter region called a codon, that matches with the anticodon of messenger RNA.
The first step in the replication of dna is catalyzed by _____. the first step in the replication of dna is catalyzed by _____. ligase helicase dna polymerase primase single-strand binding protein
Which of the following continents was not covered by ice during the Pleistocene ice age? a. Europe b. Asia c. Australia d. North America
Which of the following BEST represent a good plan for decreasing your BMI? A. measure your BMI; start a program that allows you to eat less and exercise more; reward yourself with your favorite dessert after reaching your goal B. measure your BMI; set goals; record your progress in a journal; when you reach a goal, give yourself a sensible reward C. plan a workout that gives your plenty of cardiovascular exercise; when your reach your weight loss goal, eat your favorite high-calorie food D. skip breakfast to lower your calorie intake until you reach your goal; reward yourself with a new toy
Which of the following structures surrounds the cytoplasm in a bacterial cell? A. Plasma membrane B. Cell wall C. Nucleoid D. Ribosome
Which of the following is a product of photosynthesis? A. Carbon dioxide B. Sunlight C. Water D. Oxygen
The three domains are _____. Archaea, Bacteria, and Eukarya Archaea, Prokaryote, and Eukarya Bacteria, Eukarya, and Animalia Animalia, Plantae, and Bacteria
This cross will yield four phenotypes in the 1:1:1:1 ratio: rryy x rryy RrYy x rryy RrYy x RrYy RRYY x rryy
The triplet code can produce 64 possible codon combinations. What is an advantage of this? A. Every single codon specifies more than one amino acid. B. Every single amino acid has more than one codon. C. The first two bases of the codon specify the amino acid.
How do the benefits of natural change to ecosystems compare to the disadvantages? a. The benefits are outweighed by the disadvantages. b. The benefits outweigh the disadvantages. c. The benefits are equal to the disadvantages. d. There are no disadvantages to natural change in ecosystems. Please select the best answer from the choices provided A B C D
Dog breeding is an example of natural selection. Please select the best answer from the choices provided T F
Which of the following conditions would lead to a small population size? a.) a low birth to death ratio b.) a high birth to death ratio c.) immigration d.) large number of resources
2. Which of the following is the best definition of sexual reproduction in plants? a. production of spores b. fusion of male and female gametes to make a zygote c. production of a gametophyte d. production of rhizomes 3. Which of the following is involved in asexual reproduction? sperm cells a. egg cells b. a zygote c. none of the above
Which of the following is a way that humans impact rivers and streams? a. pollution b. dams c. flooding d. all of the above
____________,inherited traits that increase an organism's chance of survival, also determine an organism's niche.
What always affects measurement error in an experiment? A. investigator bias B. variability in nature C. instrument precision D. misreading the instrument
Primary productivity is not limited by _______. a. the availability of sunlight b. time c. the availability of nutrients d. access to water
Which of the following describes a positive feedback loop? When blood sugar is low, the body sends hormones that increase blood sugar. When the body senses that the heart rate is very high, it secretes hormones that decrease the heart rate. When a pregnant woman begins to go into labor, the body sends hormones that increase the intensity of the labor contractions. When someone is exercising intensely, the body sends hormones that increase oxygen supply for cellular respiration.
Which of the following are items that are a threat to biodiversity? pollution and succession habitat loss and predation poaching and habitat loss succession and pollution
What contributes to the high level of biodiversity found in wetlands? a. the large amount of available organic matter to organisms that are food for larger organisms b. the amount of available water for organism use c. the high nutrient availability d. all of the above
What is the area of the brain that undergoes considerable development during the adolescent years? corpus callosum myelin bridges prefrontal cortex cerebral cortex?
Unlike toads, tortoises A. have amniotic eggs. B. have lungs. C. have true bone. D. have jaws and paired appendages.