Questions and answers by

fish

Questions (641)

31.Which is a function of the human immune system? to filter wastes to store minerals to make hormones to fight disease
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2. 27 views
30.Some scientists study the way fossils and living organisms are distributed, or spread out, on the Earth. What is this area of
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29.What is the purpose of a patent? to prevent people from using a new technology to protect ownership of a new technology to
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28.Which idea explains Darwin’s observations about Galapagos Islands finches? biological species concept sympatric speciation
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27.What is one way that members of Archaebacteria are different from members of Eubacteria? They lack nuclei in their cells.
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26.When a vine grows around a fence, which response is it exhibiting? gravitropism hydrotropism thigmotropism phototropism
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25.What term describes a species that is brought into an ecosystem where it does not naturally occur? threatened species
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24.Which of the following is not one of the five main groups of arthropods? insects mollusks crustaceans arachnids
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23.The _____ of a fish helps it move up and down in the water. gills swim bladder operculus scales
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22.A male bird shows bright feathers to attract a mate. What type of behavior is this? territorial behavior learned behavior
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21.Which are vascular plants? mosses and seed plants seed plants and mycorrhiza ferns and seed plants ferns and mycorrhiza
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20.What is meant by allele frequency? the number of species that have the same trait the rate at which alleles occur the number
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19.Which is a role of Eubacteria in living systems? decomposing dead plants and animals producing nuclear power for humans
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18.Which of the following is a density-independent factor? habitat food temperature water
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17.Which factor controls the water cycle? volcanic eruptions changing ocean currents energy from the sun burning of fossil fuels
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16.What is recombination? combined gene pools of many populations movement of genes across populations new groupings of alleles
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15.The fossil record shows that periods of _____ are followed by diversity in organisms. co-adaptation mass extinction
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14.How do ecologists measure population density? by counting every individual in a population by measuring the area of the
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13.Which structure connects an ovary to the uterus? a fallopian tube the cervix the urethra a seminiferous tubule
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12.Which biome is commonly found near the equator? temperate forest tropical forest coniferous forest temperate grassland
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11.Where in the body can you find chemoreceptors? on the tongue and in the nose, to detect taste or odor on the skin and ears,
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10.What characteristic do all protists have in common? structures made of many cells cell nuclei that contain DNA ability to
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9.What is a scientist called who observes animals in order to explain their behavior? ethologist environmentalist psychologist
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8.Which action removes carbon dioxide from the body? swallowing sneezing inhaling exhaling
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7.Succession is the process of _____ in a community. natural disturbance ecological change evolutionary change human disturbance
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6.Molds and mushrooms are both ______. fungi protists eubacteria archaebacteria
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5.Which of the following explains Darwin’s theory of natural selection? Present organisms are related to and descended from
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4.What is the term for the chemical messengers that the endocrine glands produce? spinal nerves target cells hormones neurons
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3.What is the function of cartilage in adult bones? allowing flexibility in joints connecting bones to bones preventing friction
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2.Which part of the blood helps prevent infection? white blood cells platelets plasma red blood cells
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2. 38 views
1.What is it called when an organism signals another that their interaction is not serious or threatening? metacommunication
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6.Each nephron is made up of capillaries that form the _____. bladder ureter glomerulus sweat glands
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5.Which type of neuron carries impulses from sense organs to the spinal cord or brain? association neuron sensory neuron motor
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4.When the body becomes dehydrated, a chemical signal is sent that causes nephrons in the kidneys to absorb more water and
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3.Viral or bacterial germs that invade body cells are called _____. white blood cells phagocytes lymphocytes pathogens
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2.Where in the body can you find chemoreceptors? on the retina, to detect a single photon of light on the skin, to detect
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2. 58 views
1.Which is one way that skin helps protect the body from infection? Skin directs sensory messages. Skin produces complement
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25.Which type of muscle causes voluntary movement? smooth cardiac skeletal
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2. 53 views
24.Which system fights off disease? skeletal nervous immune endocrine
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2. 25 views
23.Which statement about epithelium is correct? It is thin tissue that lines the alveoli. It closes the windpipe when
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2. 38 views
22.What pushes food through the digestive tract? pharynx peristalsis villi reflex
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21.Which system takes in oxygen and releases carbon dioxide? endocrine digestive circulatory respiratory
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20.A thrombus can clog an artery. What occurs when an artery in the brain is blocked? heart attack hypertension stroke
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19.What is the function of heart valves? They regulate the heart rhythm. They return blood to the heart. They force blood to
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18.Which system takes in food and breaks it down into nutrients? skeletal respiratory digestive excretory
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17.What is the liquid part of blood called? plasma fibrinogen platelet thrombus
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16.Your body’s metabolism is regulated by _____. hormones enzymes adipose cells glucose
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15.Which statement is not true of cilia in the respiratory tract? They close the windpipe opening when swallowing. They are thin
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14.Which shows the correct order in which food moves during digestion? pancreas, stomach, small intestine esophagus, small
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13.What role do villi play in the digestive process? They reduce the amount of nutrients lost in elimination. They produce
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12.Which disease causes mucus to build up in the lungs and clog the airways? cystic fibrosis bronchitis sleep apnea asthma
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11.The third stage of digestion is absorption, which begins when food enters the _____. stomach large intestine esophagus small
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10.The _____ system includes the kidneys. excretory skeletal reproductive digestive
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9.Which material inside bones is responsible for making blood cells? joints red marrow cartilage interstitial fluid
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8.Which sequence correctly shows oxygen movement during respiration? body cells, capillaries, alveoli capillaries, alveoli, body
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7.What is not a function of the skeletal system? making vitamins storing minerals protecting organs providing movement
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6.The walls of arteries include a _____ muscle layer. cardiac voluntary skeletal smooth
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5.Which statement is true of arteries? They become smaller as they move away from the heart. They prevent blood from flowing
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4.What is the function of cartilage in adult bones? allowing flexibility in joints storing calcium and phosphorus preventing
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2. 59 views
3.Which is a function of mucus in the lungs? It traps particles such as dust and pollen. It carries carbon dioxide to the body
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2.Perspiration leaves the body through the _____. sweat glands collecting ducts kidneys nephrons
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1.Oxygen-rich blood from the lungs enters the heart at what structure? right atrium left atrium right ventricle left ventricle
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15.If a native species has been labeled as endangered, what is the appropriate response? Gather data to design a recovery plan.
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14.Ozone is a molecule in the upper atmosphere that is made up of three atoms of _____. hydrogen carbon nitrogen oxygen
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13.What form of waste cannot be recycled to make new products? plastic waste paper waste metal waste food waste
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12.What is one reason funding has such an important effect on scientific research? Research results cannot be published without
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11.When sulfur dioxide reacts with water droplets in the air, it forms a substance that falls back to Earth as _____. acid rain
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10.What term is used to describe the clear-cutting of rain forests for their valuable lumber, which often results in species
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9.Builders who value the environment may include _____ in their development plans? a large playground a central parking lot a
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8.What term describes a species that is brought into an ecosystem where it does not naturally occur? competitor species
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7.Scientists share their findings with the public. Many publish their work in _____. patents recovery plans scientific journals
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6.Balancing the requirements of developers with an ecosystem is known as _____. landscape ecology emission regulation pollution
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5.What term describes a species that has far fewer members today than in the past? protected threatened restored specialized
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4.What might engineers use to test a new software design? incubators simulations robotics microscopes
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3.People are more affected by technology than science because technology _____. includes things that people need and use creates
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2.To reduce chances of system failure, engineers may use _____ . robotic guidance scientific knowledge performance testing
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1.What may happen to a species whose limited habitat is destroyed by land development? It will live elsewhere. It will attract
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15.Which factor controls the water cycle? volcanic eruptions energy from the sun burning of fossil fuels changing ocean currents
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2. 24 views
14.Which biome has characteristically low rainfall? tundra savanna chaparral desert
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13.Which factor does not control climate? the distance an area is from the sun the rate of primary productivity the amount of
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12.Which biome has no large trees because much of the soil is frozen? desert tundra chaparral savanna
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11.Mice eat corn. Hawks eat mice. Which term describes the corn in this food chain? primary consumer producer secondary consumer
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10.Which chemical cycle involves the process of photosynthesis? carbon cycle water cycle nitrogen cycle
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9.Which process produces carbon dioxide? cellular respiration evaporation precipitation photosynthesis
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8.Which term describes how a person gets energy? hydrothermal photosynthetic chemotrophic phototrophic
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7.In a food chain, a bigger fish eats a smaller fish. What is the bigger fish called? a consumer a phototroph a decomposer a
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6.From where do most producers get energy? consumers other producers decomposers the sun
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5.Most of the nitrogen in the atmosphere is found in what form? as nitrate as nitrite as ammonium as nitrogen gas
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4.Which type of forest contains many trees that shed their leaves during fall and winter? tropical coniferous deciduous
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3.What happens when people burn fossil fuels? Nitrogen is released into the atmosphere. Carbon dioxide is released into the
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2.Which biome is commonly found near the equator? temperate grassland tropical forest coniferous forest temperate forest
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2. 52 views
1.Which organisms are typically found at the beginning of aquatic food chains? octopus salmon plankton dolphins
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2. 24 views
15.What does population density measure? the number of individuals in a sample the different species in a community the degree
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2. 43 views
14.Which of the following is a density-independent factor? temperature food habitat water
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13.Which level of organization includes living and nonliving things? species organism ecosystem population
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12.Which increases as a population grows? carrying capacity food supply available habitat competition
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11.Which distribution pattern has no order as to how it is distributed through an ecosystem? uniform clumped grouped random
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10.What is the largest level of organization for the environment? population ecosystem biosphere community
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9.A cat has fleas. The cat is a _____. host predator parasite mimic
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8.What is the lowest level of organization in the environment? species community population organism
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2. 31 views