A. A way of posing a research question only. B. Used to organize data that is already known. C. An organized approach to problem solving. D. Used by all scientists in an identical way.
A. It is a collection of data designed to provide support for a prediction. B. It is an educated guess that can be tested by experimentation. C. It is a scientific fact that no longer requires any evidence to support it. D. It is a general statement that is supported by many scientific observations.
A. Research shows that other animals can be crossbred B. The offspring are given a new scientific name C. The biologist included a control in the experiment D. They can repeat the experiment and get the same results
A. Compound microscope B. Simple light microscope C. Electron microscope D. Ultracetrifuge
A. A cell’s nucleus B. A paramecium C. A DNA sequence D. A mitochondrion
A. lipids. B. amino acids. C. carbohydrates. D. nucleic acids.
A. Nitrogen and oxygen B. Oxygen and hydrogen C. Carbon and hydrogen D. Carbon and oxygen
A. Lipids B. Carbohydrates C. Proteins D. Nucleic acids
A. Amino acids B. Nucleotides C. Polysaccharides D. Cell units
A. Metabolic activities B. Heterotrophic nutrition C. Autotrophic nutrition D. Sexual reproduction
A. Cells organelles organs organ systems tissues B. Organelles cells tissues organs organ systems C. Tissues organs organ systems organelles cells D. Organs organ systems cells tissues organelles
A. Anton van Leeuwenhoek. B. Robert Hooke. C. Matthias Schleiden. D. Theodor Schwann.
A. light microscopes. B. dark microscopes. C. scanning electron microscopes. D. transmission electron microscopes.
A. cytoskeleton. B. endoplasmic reticulum. C. cell wall. D. cell membrane.
A. centrioles B. mitochondria C. Golgi apparatus D. lysosomes
A. osmosis B. bulk transport C. phagocytosis D. endocytosis
A. swell. B. burst. C. shrink. D. stay the same.
A. diffusion. B. water channel proteins. C. proteins that act like pumps. D. facilitated diffusion.
A. structure A B. structure B C. structure C D. structure D
A. Diffusion B. facilitated diffusion C. Osmosis D. active transport
A. A behavioral difference among offspring. B. The struggle for existence among living things. C. Traits that are passed from one generation to the next. D. The gradual change in organisms over many years.
A. Artificial selection carried out by humans B. The fact that only the fittest organisms survive C. A sudden change in the genetic material of an organism D. Competition for resources such as food and water
A. Natural selection B. Artificial selection C. Genetic variation D. Acquired characteristics
A. adaptation. B. polygenic trait. C. homologous trait. D. derived character.
A. A new species moves into a habitat whenever another species becomes extinct. B. Present-day organisms on Earth developed from earlier, different organisms. C. Every period of time in Earth’s history had its own group of organisms. D. Every location on Earth’s surface has its own unique group of organisms.
A. Develop cultivated plants only B. Develop domesticated animals only C. Develop cultivated plants and domesticated animals D. Breed rare, wild animal species only
A. Can pass on to offspring new characteristics they acquired during their lifetimes B. Do not pass on to offspring any new characteristics they have acquired C. Are better adapted to conditions in the environment than other organisms are D. Tend to produce fewer offspring than others do within the same environment
A. rusty water. B. volcanic rock. C. sedimentary rock. D. the sap of ancient trees.
A. an organism’s structure B. an organism’s way of life C. an organism’s environment D. an organism’s DNA
A. Similarity of chemicals in all living things B. Distribution of species on the planet today C. Shapes and structures of living organisms D. Distribution of mountain ranges on Earth’s surface
A. Most of the organisms that lived on Earth in the past are now extinct. B. The struggle for existence between organisms results in genetic changes. C. Species occupying the same habitat have identical environmental needs. D. Structures such as leg bones and wing bones come from the same embryonic tissue.