How does current affect biodiversity in rivers and streams? a. It prevents bacteria and algae from living in rivers and streams. b. It causes a decrease in biodiversity by preventing organisms from remaining in rivers and streams. c. It mixes the nutrients for plant and animal use and determines location of organisms. d. It has no affect on biodiversity..
A student studying the following pedigree states that person #9 is homozygous for a dominant trait. Explain how she was able to determine this.. A)because both male and female members of this family display the trait. B) Because this trait appeared in every generation of this family. C)Because this person’s children, both male and female, all have the trait. D) because this person’s children all express the dominant trait even though her spouse is recessive for the trait.
Which of the following is required for dark reactions to take place? a. light b. oxygen c. atp d. water please select the best answer from the choices provided a b c d
What may a salesperson say when you enter a store? a. te queda mal b. te queda bien c. como me queda d. en que puedo servirle
Three-carbon molecules of PGA are converted to energy-rich G3P sugar molecules by _____. A) O2 and H20 B) CO2 and H20 C) ATP and NADPH D) ADP and NADP+
Direct observation is the simplest and most effective method to determine population size. True or false?
What reaction is being catalyzed in this experiment? 2. what is the name of the enzyme in this experiment? what is the substrate?
(HELP)!!!!!!!!!!!!!! Which best describes how Johannes Kepler developed his laws of planetary motion? A.) He calculated the gravitational force on orbiting bodies. B.) He debated with Copernicus who proposed the heliocentric model. C.) He examined the motions of planets through a telescope. D.) He analyzed data collected by Tycho Brahe.
Where are rain gauges located? A. on or near the ground B. one meter above the ground C. on weather balloons D. on satellites
The neuroendocrine system consists of which of the following? A.Nerve impulses and hormones B.Circulation and neurons C.Neurons and nerve impulses D.Hormones and circulation
Which of the following best describes similarities that exist between reptiles and amphibians?. . They are both ectothermic and have two-chambered hearts.. . They both have streamlined bodies and three-chambered hearts.. . They are both vertebrates that lay eggs to reproduce.. . They both have gills at some stage in their lives and are endothermic.
The higher mental functions, such as reasoning, are mostly carried out in the _________________. cerebellum brainstem limbic system cerebral cortex
Identify the animal below that is not in the same class as the others.. A.Crayfish. B.Crabs. C.Scorpions. D.Lobsters
Antibodies are produced when the body is exposed to __________. antigens macrophages receptor proteins
Which of the following statements about human impact on trees is true? a. Human activity always has a negative impact on trees. b. All human uses of trees require destruction of the trees. c. Human activity has had both a positive and negative impact on trees. d. Cutting down trees is the only activity that has a negative impact on trees.
Animals that use language are most likely those that have the greatest capacity for A. innate behavior. B. behavioral cycles. C. habituation. D. insight learning.
Which of the following best explains the importance of Earth’s crust to living organisms? a. The continental crust allowed the evolution of life on land. b. The crust provides raw materials necessary for life. c. The crust allowed the formation of fossil fuels. d. The rock cycle recycles sedimentary rocks formed from animal shells.
Which is an example of why the process of photosynthesis is important to life on Earth? A) Grass uses photosynthesis to produce glucose, which is used within the grass for growth. B) Fungi use photosynthesis to decompose dead and decaying plant matter. C) Cold-blooded animals use photosynthesis to convert sunlight into energy for cell functions. D) Green plants use photosynthesis to remove oxygen gas from the atmosphere and replenish the earth’s carbon dioxide.
A magnifying glass is an example of which type of microscope? electron microscope scanning microscope compound light microscope simple microscope
Which materials are excreted through sweat glands in the skin? carbon dioxide, hydrogen, and water salt, urea, and water urine, alcohol, and water fats, ammonia, and water
The receptor potential is generated at the _______. the receptor potential is generated at the _______. receiving region secretory region output region conducting region
In what pattern does the flow of energy in the ecosystem take place? multirectional bidrectional unidirectional
Which statement best describes the amount of catalyst that remains at the end of a reaction? A.More catalyst is present at the end than at the beginning of the reaction. B.Less catalyst is present at the end than at the beginning of the reaction. C.The amount of catalyst is the same at the end as at the beginning of the reaction. D.The catalyst is consumed by the reaction, so none remains at the end of the reaction.
Which term refers to a solution with more molecules outside the cell than inside the cell? A. hypertonic B. hypotonic C. equitonic D. isotonic
Which of the following plant structures provides most of the water necessary for photosynthesis? a. roots b. leaves c. chloroplasts d. stomata
Which of these elements is found in both carbohydrates and water? carbon oxygen-----this one nitrogen helium