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Biology

Which one of the following criteria is necessary for natural selection to occur? A. Individuals show no variation in fitness levels.B. Individuals have the same adaptations.C. Enough resources exist for individuals to survive and thrive.D. A struggle for existence is apparent.

Samantha Barber

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How do passive transport and active transport differ? Is osmosis an example of passive transport or active transport? Why?

Kevin Sutter

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Which statement describes decomposers?. . . . A.Decomposers are those organisms that recycle matter in the ecosystem.. . . . B.Decomposers are insignificant organisms in the ecosystem and can be absent in some ecosystems.. . . C. Decomposers can produce their own source of energy and can sometimes act as primary producers. .

Tara Andrews

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Contrast disruptive and stabilizing selections

James Washington

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Which of the following statements about the tundra is not true? a. Tundra means “treeless land.” b. Plants and animals in the tundra have adapted to the extreme climate. c. Temperatures in the tundra range from extreme highs to extreme lows. d. The alpine tundra can be found on mountaintops.

Mindee Nelson

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Skin color, fur color, and height are examples of which inheritance pattern?

Kaitlin Dean

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Changes in the trilobite exoskeleton can be attributed to ____..

Theresa Perry

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Which substance is the most acidic?

Nicholas Rivera

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Humans add greatly to the carbon cycle by A. driving cars B. planting trees C. conserving energy D. using solar power

Ashley Howard

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Which best illustrates the result of the process of meiosis? A pea plant has the same flower color as its parent plants. A daughter looks different from both her mother and her father. A cheetah cub has very similar fur to its mother. A Labrador puppy looks exactly like its father.

Ross Pratt

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What is one impact of carbon emissions on the country of peru? increased lung and other cancers andes glaciers will disappear reduction in dependence on foreign oil increased tourism traffic to machu picchu?

Cynthia Baker

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Solid fats have a high proportion of _____. glycerol saturated fatty acids unsaturated fatty acids fish and vegetable oils

Kevin Sutter

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Which of the following is used as evidence in supporting the idea that life changes over time? A. the time period in which an embryo develops B. the similarities in the body systems such as the nervous and circulatory systems C. the existence of homologous structure D. the big bang theory

Kristi Hammond

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The word cardio refers to __________.

Ashley Howard

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The scientific process is ________ involving both inductive and deductive reasoning

Alexa Spicer

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What is the structure and function of a pseudopod? it sticks out like a foot and helps with movement. it beats liquid like a whip and helps with movement. it looks like a hair and sweeps food into a mouth-like opening. it contains membranes that carry out photosynthesis?

Blair Lewis

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Why does net productivity diminish with increasing trophic levels??

Kristi Hammond

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Which of the following is a reason a theory cannot become a law?

Donald Ward

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Which enzymes are secreted only by the pancreas? nucleases amylase and proteases lipases amylase, proteases, lipases, nucleases

Melissa Norris

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Why has Mars been more studied with telescopes than Jupiter

Whitney Matthews

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Whales have what seem like remnants of a pelvis and femur, as shown here. What are these structures an example of?

Rodney Fox

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Which hormone is responsible for regulating the sleep cycle in your body? Select one of the options below as your answer: A. Melanotropin B. Melatonin C. Adrenaline

Timothy Norman

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Compare the nitrogen, carbon, and oxygen cycles

Ross Pratt

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A person's temperature is 40° C. What would it be in Kelvin? A. −313° CB. −313 KC. 313° CD. 313 K

Victoria Fowler

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Which of the following is a component of healthy soil ecosystems? a. fungi b. bacteria c. nematodes d. all of the above I'm pretty sure it is just fungi... The others wouldn't really make the ecosystem "healthy"...

Karen Wright

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Plants ________ to protect themselves from herbivores. answer correct reduce their sugar content none of the listed responses is correct. grow very tall use dull colors use chemical toxins

Karen Wright

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Which of the following are items that are a threat to biodiversity? A.pollution and succession B.habitat loss and predation C.poaching and habitat loss D.succession and poaching Plzzz help!!!!!

Ashley Howard

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Which process drives Darwin’s theory of evolution?

Heather Maxwell

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The product of the p53 gene _____. the product of the p53 gene _____. slows down the rate of dna replication by interfering with the binding of dna polymerase

Ashley Howard

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Which process requires the participation of all three types of rna?

William Cain

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Which scientist proposed a link between contaminated water and cholera A.Pasteur B. curie C. salk D.koch

Samantha Barber

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Genetic drift tends to occur in populations that (1 point)are very large. are small. are formed from new species. have unchanging allele frequencies

Ramon Kelly

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Which experiment should be conducted as a field investigation? observing changes in the nesting behavior of wood ducks measuring the fermentation rate of yeast in salt water determining the germination rate of a new soybean hybrid investigating gene expression in fruit fly offspring

Mindee Nelson

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Which of the following is the biggest threat to the Monarch butterflies’ annual migration? a. illegal logging c. airplanes b. cold winters d. new predators

Chelsea Hayes

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Aerogenerators are used to produce electricity from _____. wind moving water the sun

Rodney Fox

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Why do naturalists suggest that we plant more trees? Plants use CO2 but do not release any, thus maintaining a balance of CO2 in the atomsphere. Plants release CO2 through respiration and use it for photosynthesis, thus decreasing the amount of CO2 and maintaining its balance in the atmosphere. Plants do not use any CO2, thus maintaining low levels of CO2 and balancing its level in the atmosphere.

Craig Stewart

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Biochemistry is the study of _____. energy and matter within living organisms energy and matter of earth energy and chemicals chemical reactions and bonds

Rodney Fox

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What polysaccharide do plants store in plastids? glycogen lactose starch cellulose

Kyle Mckinney

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Scientific evidence is most likely to be consistent if it is based on data from A) random samples B) uncontrolled experiments C) biased experimental designs D) small data samples

Annie Barnes

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1.which of the following is NOT a major component of soil A.mineral matter B.air C.humus D.earthworms 2.a soils texture is determined by ___ A.mineral composition B.type of humus C.water content D.particle size 3.the main source of organic matter in soil is A.water B.plant C.fungi D.bacteria

Jeremy Wood

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Which object reflects light with the longest wavelength? a yellow book a violet flower a blue paper a green leaf

Caroline Campbell

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What three characteristics are used to classify prokaryotes?

Dana Keller

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Poor measurement practices are likely to lead to data that are ________. A. calibrated B. inconsistent C. minimal D. scientific

Ramon Kelly

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Which statement could be categorized only in the anaerobic section of the Venn diagram? a. is performed by eukaryotes b. has commercial uses c. regenerates NADH d. occurs in the mitochondria

Timothy Norman

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Matter is moved through the Earth by the interaction of Earth’s systems. True or False

Craig Stewart

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HELP The complement system is a______ barrier of the immune system. A complement system is a group of _____ in the blood that detect pathogens that have entered the body. The complement system can cause _______, the swelling of a part of the body accompanied by redness, swelling, and pain as a response to infection.

Carlton Burgess

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Though they are constantly changing, ecosystems are naturally

Kathy Robinson

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Natural pollution includes _____. Pesticides Falling leaves Disposable products Smog is not the answer Give the science behind your answer

Kristi Hammond

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The first step in restoring pine woodlands is prescribed burning. T or F

Ralph Lopez

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During development, an embryo is embedded in the a. vagina b. cervix c. endometrium d. ovary

Ronald Miller

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