_____ transfers heat within the atmosphere and ocean.a. convection b. radiationc. condensationd. conduction
]Which of these statements best explains the origin of life on Earth? Primitive plants were created from living molecules. Plant cells were formed by the destruction of fossils in rocks. Non-living molecules were transformed into bacteria by chemical processes. Reproducing molecules evolved into living molecules by biological processes.
The structure of an atom is best described as: 1. neutrons in orbit about a nucleus of protons bound to electrons.2. electrons and neutrons in orbit about a nucleus of protons3. protons and neutrons in orbit about a nucleus of electrons .4. electrons in orbit about a nucleus of protons and neutrons
Lactase and carbonic anhydrase are examples of what type of substance? A.substrate B.reactant C.product D.enzyme
Polluted water can contribute to _______. a. drought b. increased CO2 c. deforestation d. glacial melting
At one time, dinosaurs lived on Earth. Today they are extinct. This relates to _____. A. microevolution B. both macroevolution and microevolution C. macroevolution
Why do arteries need to be thick, muscular, and elastic? to make our bodies strong for movement to withstand the pressure of the blood that is being pumped by the heart to pull the blood back to the heart from all areas of the body to withstand changes in blood temperature
Alcohol consumption tends to cause more ___________ behavior. A. Defensive B. Aggressive C. Passive D. Predictable
PLEASE HELP ME !!!! Which organisms produce about half of the oxygen on Earth? A. Plankton B. Humans C. Rocks D. Aquifers
17. Biologists have hypothesized that echinoderms are closely related to chordates because both groups are deuterostomes.
Which of the following events can result in an offspring with unique heritable characteristics? Select each correct answer. More than one answer may be correct. 1)mutations of genes in an organism's body cells 2)replication of existing genes during asexual reproduction 3)mutations of genes in an organism's sex cells 4)recombination of existing genes during sexual reproduction
1. To survive, all animals must do all of the following except obtain ______. oxygen eat breathe air eliminate waste 2. Which of the following is an adaption that helps an animal obtain food? jet propulsion hibernating in the winter sweating sharp, narrow teeth 3. Which of the following adaptions would help an animal avoid predators? echolocation hibernation changing color to blend in with surroundings coming to the surface to breathe 4. How do marine mammals breathe?
HELP A glucose molecule is the A smallest type of protein B monomer of starch and cellulose C largest of the carbohydrate polymers D fundamental unit of genetic material
Because prokaryotes do not have many specific structures, they _____. A) cannot move through their environment B) cannot survive in most environments C) do not have many specific functions D) rely on other organisms for basic life functions Description
Which one of the following is a type of passive transport? A. Proton pumps B. Osmosis C. Endocytosis D. Exocytosis
A ribozyme is _____. a ribozyme is _____. a catalyst that uses rna as a substrate an rna with catalytic activity an enzyme that synthesizes rna as part of the transcription process an enzyme that catalyzes the association between the large and small ribosomal subunits
A major factor that negatively affects biodiversity is A. biological magnification. B. habitat fragmentation. C. contour plowing. D. nonrenewable resources.
How are individual atoms of oxygen formed in the stratosphere? a. Individual oxygen atoms are formed when oxygen molecules collide with each other. b. Individual oxygen atoms are formed in the sun. c. Individual oxygen atoms are formed during photosynthesis. d. Individual oxygen atoms are formed when UV rays strike oxygen molecules.
Reef producing coral are called _______. a. mobile b. hermatypic c. limestone polyps d. all of the above
The formation of new organisms is called _____. A- reproduction B- growth C- adaptation D- development
How is the nucleus involved in the production of enzymes? A. The nucleus translates the ribosomal RNA for the enzymes to be synthesized in mitochondria. B. The nucleus is involved in the packaging and transportation of enzymes outside of the cell. C. The nucleus receives the messenger RNA and is the site where enzymes are synthesized. D. The nucleus transcribes and releases messenger RNA signaling for the enzymes to be synthesized.
Tropical grasslands called steppes are found in the tropical wet-and-dry climate region. true or false?