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Biology Questions
BIOLOGY
MIDDLE SCHOOL
Which is a requirement for natural selection to occur?(a) heritable variations for some traits(b) the ability of an organism to improve a trait during its lifetime(c) equal probability of survival for all offspring(d) fewer offspring than the environment can support
BIOLOGY
HIGH SCHOOL
The _____ reaction of photosynthesis produces oxygen and ATP.
BIOLOGY
HIGH SCHOOL
The sides of the DNA molecule, the rails of the ladder, are composed ofA. phosphates only.B. nitrogenous bases only.C. phosphates and sugars.D. nitrogenous bases and sugars.
BIOLOGY
MIDDLE SCHOOL
Which feature is found in eukaryotic cells but not in prokaryotic cells? A. plasma membrane B. nucleus C. cytoplasm D. genetic material
BIOLOGY
MIDDLE SCHOOL
What are two types of evidence that suggest that evolution has occurred?
BIOLOGY
HIGH SCHOOL
Gametophytes areA. gametes.B. zygotes.C. haploid.D. diploid.
BIOLOGY
HIGH SCHOOL
Scientists consider metaphaseanaphaseprophaseS phaseinterphase the "resting" phase of the cell cycle because they can't see a visible change during this phase.
BIOLOGY
HIGH SCHOOL
Which of the following accurately describes the binomial nomenclature naming system?a. The second word is always capitalized.b. The second word indicates the organism's genus classification.c. The first word indicates the organism's genus classification.d. The first word is always lowercase.
BIOLOGY
HIGH SCHOOL
Which form of natural selection on polygenic traits results in the creation of two distinct phenotypes? A. Directional selection B. Disruptive selection C. Stabilizing selection D. Artificial selection
BIOLOGY
HIGH SCHOOL
Many cacti do not have leaves but rather have oversized stems.. what role of leaves is therefore taken on by the stems of cactia. they produce food by photosynthesisb. they absorb water and nutrients from the soil c. They transport materials throughout the plant d. they store excess water
BIOLOGY
HIGH SCHOOL
8. which of the following statements is true? A. Glacial erosion forms wide, U-shaped valleys B. Mudflows are the least dangerous type of sediment flow C. mass wasting happens when sediment is carried from a low elevation to a higher one D. in saltation, acids and salt in ocean water dissolve rock minerals
BIOLOGY
HIGH SCHOOL
What do aerobic respiration and anaerobic respiration have in common?
BIOLOGY
HIGH SCHOOL
Halophiles are a type of (1)_____ and are considered (2) _____lovers.1)eubacteria, archaea, or virus2)virus, salt, or heat
BIOLOGY
HIGH SCHOOL
How do plants obtain carbon atoms? a. from carbon in the soilb. from microorganisms that live in soilc. from carbon dioxide in the atmosphered. from animals that feed on the plants
BIOLOGY
HIGH SCHOOL
Which biological molecule contains a large amount of the element nitrogen? A) carbohydrates B) lipids C) proteins D) starches
BIOLOGY
HIGH SCHOOL
Which organism obtains its energy from dead or decaying matter?
BIOLOGY
HIGH SCHOOL
Which of the following best describes an ecosystem?A) all of the non-living factors that characterize in a given areaB) all of the different species living in a given areac) all of the members of a single species living in a given aread) all of the biotic and abiotic factors in a given area
BIOLOGY
HIGH SCHOOL
The enzymatic hydrolysis of sucrose by the enzyme sucrase will result in the formation of its two monosaccharide components, glucose and fructose, as seen in the model above. The activity of an enzyme is affected by many factors including temperature and pH. Each enzyme has an optimum temperature and pH at which its reaction rate is fastest. The optimum pH range for sucrase activity is 4 - 8.Imagine the pH of the environment in which the hydrolysis of sucrose is to occur has dropped to 2. How will this drop in pH influence point D in the model?A)The enzyme (B) will allow less of the substrate (A) to move into the active site (C). B)More of the substrate (A) will fit into the active site (C), so more products will be produced. C)The substrate (A) will no longer fit into the active site (C) because the enzyme has changed shape. D)There will be no change to the components of point D with a drop in pH; only temperature can denature the enzyme.
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