Channels within the structure of the cell membrane are composed of A) carbohydrates. B) disaccharides. C) phospholipids. D) proteins.
Smooth muscle, a type of specialized muscle cell, functions in which process? 1. food digestion 2. skeletal movement 3. pumping of blood 4. heart contraction
Which feature is shown ONLY by higher invertebrates, as compared to lower invertebrates? Bilateral symmetry True coelom Three germ layers
What role does your heart play in delivering oxygen to your body cells? The heart breaks down carbon dioxide into carbon and oxygen. The heart pumps oxygen-rich blood to your body cells. The heart pumps oxygen through the alveoli, which deliver it to body cells. The heart takes in oxygen from the environment and delivers it to cells.
Which of these is true of the materials making up the buffy coat in centrifuged blood? which of these is true of the materials making up the buffy coat in centrifuged blood? they are less dense than both erythrocytes and plasma. they are denser than erythrocytes but less dense than plasma. they are intermediate in density between erythrocytes and plasma. they are denser then plasma and erythrocytes?
Why do classification systems change over time? A. Scientists find new evidence in their studies. B. Scientists use old methods of classification. C. Scientists repeat experiments and find no changes. D. Scientists find similar evidence to previous work.
Talking about all things lunar, which of these forms of madness is related to the moon? A) HystericaB) LunacyC) InsanityD) Biebermania
Unstable atmospheric conditions lead to the formation of lightning and thunder in a. nimbostratus clouds. c. altostratus clouds. b. altocumulus clouds. d. cumulonimbus clouds.
Weathering that does not alter the chemical composition of the rock is called a. chemical weathering. c. biological weathering. b. physical weathering. d. acid weathering.
Which is the process of cancerous cells spreading to other body areas? metaphase cytokinesis fertilization metastasis
A period during which the embryo of a seed is alive but not growing is a. dispersal. b. fertilization. c. germination. d. dormancy.
Which process plays an important role in the cycling of both carbon and nitrogen? (The answer is not respiration)
Any time stress causes rocks to change, ____________ is the result. a. tension c. compression b. folding d. deformation
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..
Where are rain gauges located? A. on or near the ground B. one meter above the ground C. on weather balloons D. on satellites
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.
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 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
Which of the following is a way that humans impact rivers and streams? a. pollution b. dams c. flooding d. all of the above
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
Which is a similarity between alcohol fermentation and aerobic respiration? Both require oxygen. Both require light energy. Both start with glycolysis. Both produce alcohol.
Total global precipitation is __________ total global evaporation. A)greater then B)less then C)equal to