Which of the following are benefits of genetic engineering? 1)new vaccines 2)creation of toxic waste 3)sterile offspring 4)cancer 5)drugs seedless grapes
Adult skin cells can no longer become other types of cells because they have already undergone _________________________. (1 point)
The lock-and-key mechanism refers to? A.) The complementary shapes of an enzyme and a substrate. B.) the attractive forces between an enzyme and a substrate. C.) the ability of an enzyme to lower the activation energy of a reaction. D.) the ability of an enzyme to “unlock” the products of a reaction.
Which Statement is true of Homo sapiens? A. The evolved after the Cro-Magnons. B. The have been Earth's only hominine for the last 24,000 years. C. They became extinct about 1 million years ago. D. They coexisted with Homo habilis for several thousand years.
Which of the following best describes the Americans who served as infantry soldiers in Vietnam? A. Most were young, working-class draftees. B. Most were young, working-class volunteers. C. Most were volunteers in their late twenties. D. Most were drafted while attending college
What is the current greatest threat to agricultural sustainability? a. erosion b. water pollution c. air quality d. all of the above
What theme is featured in Machiavelli’s The Prince? A. the value of living a morally conscientious life B. the importance and limits of political power C. the desire to achieve quick and cutthroat results D. the need to win regardless of the consequences NextReset
Harlequin shrimp _______. a. control starfish populations b. clean parasites from select fish species c. control tubeworm populations d. hide within coral using their special camouflage
Connecting the concepts: genetics concept map can you correctly organize these terms associated with mendelian genetics?
Which scenario best describes an object with a displacement of zero? A. A train moves uphill as it travels in a straight path. B. A person walks 2 miles north and 2 miles west. C. A ball rolls from the top to the bottom of a hill. D. A race car starts and ends at the same point on a track.
Which of the following is most likely the reason that nations raised tariffs on imports during the Great Depression? a. They wanted to help other nations profit from trade. b. They wanted to terminate all trade with other nations. c. They wanted to increase sales of their own products. d. They wanted to encourage more profitable imports.
Phagocytosis is exemplified by ______. phagocytosis is exemplified by _______. a cell manufacturing a substance that is first enclosed in a vesicle and then later secreted from the cell most types of white blood cells ingesting bacteria, viruses, and other foreign substances oxygen entering cells by diffusion a cell sampling a tiny amount of extracellular material none of the listed examples describes phagocytosis
The Cambrian Explosion resulted in the evolution of the first A) Dinosaurs and mammals B)Representative of most animal phyla C)Bacteria D) Land animals
Which organelle should be listed under “Both” in the diagram? centriole mitochondrion chloroplast cell wall
The ____________________ produce(s) hormones that cause you to feel frightened during a horror movie. Fill in the blank.
1. A flexible, supporting structure found only in chordates is the (1 point) nerve net. notochord. pharyngeal slits. dorsal fin. 2. Ancient chordates are thought to be most closely related to which of the following species? (1 point) spiders earthworms octopi sea stars
Which organelles of a cell possess their own DNA?. A) Lysosomes and plasma membrane. B) Mitochondria and chloroplasts. C) The Golgi apparatus and ribosomes
Which is the best reason for using a temperature probe instead of a thermometer? to make measurements in degrees Celsius to make measurements in degrees Fahrenheit to record continuous measurements over several minutes to record individual measurements several times in a day
How often does the body perform cellular respiration?. A.once in the morning and once at night. B.only at night. C.continuously. D.only when the body runs out of ATP
Few fossils of the earliest animals still exist because they A. Had hard shells that broke down easily, leaving no trace. B. We’re large and likely to be eaten by others after they died. C. We’re soft bodied and tiny, therefore unlikely to fossilize. D. Lived only in volcanic regions and were destroyed by lava flows.