Why is the scientific method described as nonlinear a.The steps of the scientific method are repeated in a cycle. b.Scientists often repeat one or more steps several times. c.Sometimes scientists forget to perform some of the steps. d.The steps can be performed only once but in any order.
A substance that enters into a chemical reaction is called a(n) _____. enzyme reactant catalyst product
Which of the following is true of conifers? A) The sporophytes grow directly from the gametophyte B) The spores release from the gametophyte C) The gametophytes grow directly from the sporophyte D) The spores release from the male cones I best guess would be D?
Tropical areas receive the most solar radiation because A. the Sun's rays are nearly perpendicular to Earth's surface. B. the air is thinner, causing more of the Sun's rays to reach the surface. C. most tropical areas are situated at higher elevations, closer to the Sun. D. they're surrounded by large bodies of water which reflect sunlight.
In which of the following does the land being moved contain approximately 60% water? landslide slump mudflow creep
A good model of the cell membrane would be A) a chain link fence B)a film of food wrap C)a wall of stone and mortar D)a river with objects floating in it
Which changing external condition triggers the salivary glands? a. lack of oxygen b. lack of water c. disease-causing agents d. change in temperature
Which wavelengths of sunlight carry the most energy? infrared rays ultraviolet rays visible light radar waves
21. The ____________ of animals is based on scientists’ current understanding of the evolutionary history of living species. (1 point)
How do organic farming practices relate to soil health? a. Organic farmers rely on soil health for good crop production. b. Organic farmers rely on the interaction between soil microbes and organic matter. c. Organic farmers avoid the use of pesticides and chemicals. d. all of the above.
What is the ABO blood classification based on? A. antibody on the red blood cell B. antigen in the blood C. antigen on the red blood cell D. hemoglobin in the blood
How does mitosis in plant cells differ from that in animal cells? A. Plant cells lack spindle fibers. B. Plant cells lack centrosomes. *C. Animal cells lack cytokinesis. D. Animal cells lack a cell plate.
What are the forces that struggle in the plot of a story? the external and internal conflict the good guy and the bad guy the diction and the theme the protagonist and antagonist
Soil color is classified by _______. a. using a microscope b. taking core samples c. determining the proportion of minerals d. using a color reference chart
Cells are able to remove large amounts of material using A) ectocytosis. B) exocytosis. C) phagocytosis. D) pinocytosis.
Which of the following accurately describes the structure of DNA? A. DNA consists of four bases: A, G, C, and U. B. A always pairs with C, and G always pairs with T. C. DNA is in the form of antiparallel strands twisted as a double helix. D. DNA is made up of nucleotides, containing a phosphate group, a base, and another phosphate group.
Which criterion is used to functionally classify neurons? which criterion is used to functionally classify neurons? the number of processes extending from the cell body neuron the direction in which the nerve impulse travels relative to the central nervous system whether the nerve fibers are myelinated or unmyelinated whether the neurons are found within the cns or the pns?
Which feature of large biological molecules explains their great diversity? which feature of large biological molecules explains their great diversity? the diversity of elements found in large biological molecules the many classes of large biological molecules the many ways that monomers of each class of biological molecule can be combined into polymers?
Which of the following statements about biogeochemical cycles is not true? a. Biogeochemical cycles include living and nonliving elements. b. The rock cycle is a biogeochemical cycle. c. Biogeochemical cycles are an important part of the Earth system. d. Carbon, nitrogen, and oxygen cycles are biogeochemical cycles.
Which of these statements is true of the hypothalamus? A)It controls emotional responses and provides information on equilibrium. B)It contains the cardiac and vasomotor centers that regulate heartrate and blood pressure. C)It controls the autonomic nervous system and regulates hunger and thirst sensations. D)It contains centers that regulate sneezing, hiccupping, and coughing.
Which of the following cases represents the phenomenon of contact inhibition? a. Healing of an injury b. Growth of a tumor c. Tumor metastasis
Which of the following statements about rural communities is true? a. Rural communities can support any population size. b. More people in the United States live in rural communities than they did in 1900. c. Rural communities were built based on the location of available resources. d. People in developed countries are moving back to rural communities...