生物
細胞生物学、遺伝学、生態学、生命科学の基礎。
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which term means process of visual examination of the external ear and …
Otoscopy
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which term means \process of visual examination of the external ear and…
otoscopy
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1. determine the probability of their offspring having short hair? answ…
Probability of long hair is \(100\%\) Probability of short hair is \(0\%\)
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unit 5 test - oceans and atmosphere 8. how do temperatures change as al…
C. Temperatures decrease ### 9.
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similarly, cross-country skiing offers excellent cardiovascular benefit…
In one study, elite endurance skiers were more likely to suffer from heart arrhythmias.
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28 the mineral which is an important component of hemoglobin, the subst…
D. iron
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26 which statement about fats is false? a fats serve as a reserve suppl…
D. Fats help filter and get rid of waste products in the body
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the trip to mars, using todays rocket technology, would take eight or n…
The author does not explain why astronauts would not be able to prepare for cramped conditions on Earth.
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why are advantageous traits more likely to be passed onto offspring? be…
Because they are more likely to survive and reproduce.
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a tale of two cities by charles dickens (adapted excerpt) the story tak…
B. Doctor Manette argued passionately, despite the lack of attention from the members of the Tribunal.
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what was the \velvet divorce\? czechoslovakias split into two countries…
Czechoslovakia's split into two countries
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a tale of two cities by charles dickens (adapted excerpt) the story tak…
- "Here Doctor Manette had ascertained, through the registers on the table, that his son - in - law was among the detainees" - "But should, for his sake, be held blameless in safe…
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students must take an ap sciences exam their senior year: 25% take ap c…
Label 1 = 25% <br> Label 2 = 35% <br> Label 3 = 40% <br> Label 4 = 12% <br> Label 5 = 7%
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c. commensalism d. predation 6. in a mutualistic relationship: a. one s…
6. B. Both species benefit 7. C. Commensalism 8. D. Predation 9. B. Niche 10. C. It has a disproportionately large effect on community structure
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1. which of the following best describes natural selection? a. random c…
1. C. Differential survival and reproduction of individuals with favorable traits 2. C. Natural selection 3. C. Photosynthesis 4. B. Two species evolve in response to changes in e…
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chinas economic expansion after the cultural revolution is a result of …
new socialist reforms.
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which statement best describes dnas relationship to a gene and chromoso…
A. A gene is a short section of DNA, and a chromosome is made from DNA.
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mao zedong launched the cultural revolution in china in response to new…
new economic policies that threatened social equality.
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saltatory propagation occurs in ______ axons, in which action potential…
myelinated; move from one node of Ranvier to another
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in which type of axon will velocity of action potential conduction be t…
Myelinated axons with the largest diameter
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what changes occur to voltage - gated na+ and k+ channels at the peak o…
Inactivation gates of voltage - gated Na⁺ channels close, while activation gates of voltage - gated K⁺ channels open.
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what is the function of the myelin sheath? the myelin sheath increases …
The myelin sheath increases the speed of action potential conduction from the initial segment to the axon terminals.
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why does regeneration of the action potential occur in one direction, r…
The inactivation gates of voltage - gated Na⁺ channels close in the node, or segment, that has just fired an action potential.
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an action potential is self - regenerating because _________. repolari …
depolarizing currents established by the influx of \(Na^{+}\) flow down the axon and trigger an action potential at the next segment.
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what type of conduction takes place in unmyelinated axons? electrical c…
Continuous conduction
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thinking critically 5. if a substance is known to enter a cell by diffu…
Raising the temperature would increase the rate at which the substance enters the cell. This is because an increase in temperature increases the kinetic energy of the molecules of…
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the generation of an action potential in a neuron requires the presence…
voltage - gated channels
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guanine adenine uracil which sugar is present in the nucleic acid that …
Ribose
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14) as russia began to evolve in the 1800s, which of the following is t…
14. A. Alexander II attempted to bring social and economic change and freed the serfs 15. D. Enlightenment ideas from Europe and the U.S. inspired revolutions and change 16. D. Pe…
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part f (6 of 6) what is the first change to occur in response to a thre…
Voltage - gated \(Na^{+}\) channels change shape, and their activation gates open.
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what is the role of rna? to provide the original blueprint for protein …
to move information from the nucleus to the ribosomes for protein synthesis
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what event triggers the generation of an action potential? the membrane…
The membrane potential must depolarize from the resting voltage of -70 mV to a threshold value of -55 mV.
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which structural characteristic is seen in rna but not in dna? o double…
a single strand
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what characterizes repolarization, the second phase of the action poten…
Once the membrane depolarizes to a peak value of +30 mV, it repolarizes to its negative resting value of -70 mV.
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what characterizes depolarization, the first phase of the action potent…
The membrane potential changes from a negative value to a positive value.
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which discovery is attributed to phoebus levene? extraction and observa…
identification of ribose and deoxyribose
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what opens first in response to a threshold stimulus? voltage - gated n…
Voltage - gated Na⁺ channels
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where do most action potentials originate? initial segment cell body no…
Initial segment
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which base is found only in rna? ribose thymine uracil deoxyribose
uracil
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a single strand of dna helix has the code ataggc. which would be the co…
TATCCG
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why can uracil be used as a \clue\ to identify rna in a strand? because…
Because uracil is unique to RNA.
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proteins are made in ribosomes, but dna is stored in the nucleus. how d…
RNA copies DNA and transports it to ribosomes for protein synthesis.
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what did chargaff discover while studying bases in the dna of organisms…
The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.
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which structural component is found in dna but not in rna? ribose deoxy…
deoxyribose
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what prevents the na⁺ and k⁺ gradients from dissipating? na⁺ cotranspor…
\(Na^{+}-K^{+}\) ATPase
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the resting membrane potential depends on two factors that influence th…
The presence of concentration gradients and leak channels.
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the plasma membrane is much more permeable to k+ than to na+. why? the …
There are many more \(K^{+}\) leak channels than \(Na^{+}\) leak channels in the plasma membrane.
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sodium and potassium ions can diffuse across the plasma membranes of al…
B. Leak channels
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9. choose the correct answer. which statement is true about energy tran…
- **Question 9**: Plants use energy from the sun to make food, and animals eat the plants and gain their stored energy. - **Question 10**: potential energy.
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lons are unequally distributed across the plasma membrane of all cells.…
Resting membrane potential (RMP)
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which is a complete sentence? in missouri, farmers harvest more than fo…
In Missouri, farmers harvest more than four hundred thousand acres of alfalfa every year.
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read the article to learn more about the types of rna, specifically mrn…
mRNA: Carries genetic code from DNA to ribosomes as a template. tRNA: Brings amino acids to ribosomes via anticodon - codon pairing.
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how is the u.s. constitutional government designed? select all that app…
- The three branches of government can check and balance each other. - Powers not given to the federal government are reserved to the states.
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what are biological agents? living things that can cause mutations non …
living things that can cause mutations
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which of the following are organisms in phylum cnidaria? mammals and re…
coral and jellyfish
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within the phylum cnidaria, which of the following describes the polyp …
cylindrical shaped cnidarian with tentacles facing upward
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what kind of mechanisms does the body have to stop mutations from occur…
repairing and proofreading mechanisms
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what is the name given to the stinging cells on cnidarians that are use…
cnidocytes
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what is a potential benefit to mutations? creates genetic variation cau…
creates genetic variation
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what are the two tissue layers of a cnidarian? polyp tissue and medusa …
outer epidermis and inner lining for digestive cavity
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this is a sea anemone, which belongs to phylum cnidaria. what term do w…
polyp
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the name of phylum cnidaria originated from the fact that organisms in …
stinging cells used for protection and hunting prey
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what protects the seed? seed coat embryo endosperm
seed coat
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what is the primary way that the united states ideals spread through th…
Other nations observe the success of American democracy and institute a similar one.
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the male part of the flower is the _____________.
stamen
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the female part of the flower is the ______________
pistil
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living creatures need carbohydrates to ____________ our body.
Living creatures need carbohydrates to **provide energy to** our body.
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when each leaf arrives from a separate mode on the stem, theyre said to…
alternate
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are openings on the underside of the leaf. they help with the exchange …
Stomata
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help to carry water, minerals, and food up and down the leaf. type your…
Vascular tissues
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what makes leaves green? nutrients chloromast chlorophyll the veins
chlorophyll
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5 multiple choice 2 points great dane chihuahua collie saint bernard (a…
Artificial selection driven by human choices in breeding
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what material makes up the skeleton of hexactinellid sponges? silica ca…
silica
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in reference to the phylum porifera, what is suspension feeding? having…
collecting food particles from the water as it passes through the body canals
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the stem carries water, minerals, & _____________ prepared by the leave…
food
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how do sponges within phylum porifera obtain their nutrients? by filter…
By filtering water and trapping food particles
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3. the number of burmese pythons in the florida everglades has been inc…
a) \(y = 200000\cdot(1.005)^{x}\) b) The value of \(a = 200000\) represents the initial number (in 1975) of Burmese pythons in the Florida Everglades ecosystem.
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what type of habitat are hexactinellid sponges commonly found in? shall…
deep - sea environments
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multiple choice 2 points what was dr. kettlewells main conclusion from …
Natural selection favored moths whose coloration matched the environment.
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what is the distinguishing feature of sponges (phylum porifera) that se…
They lack true tissues.
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what is the class that comprises 76% of the species in phylum porifera?…
Demosponge
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which specialized cells help support the skeletal fibers in the cell? s…
Amoebocytes
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the most diverse group of sponges has nearly 8,000 species and the larg…
Class Demospongiae
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complete the text with the correct pair of words. ______ having ______ …
Besides... poor
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which of the three classes of phylum porifera has spicules made of calc…
Class Calcarea
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1. what is the difference between abiotic and biotic factors? 2. give t…
1. Abiotic factors are non - living components (e.g., temperature, water), while biotic factors are living components (e.g., plants, animals). 2. Water: Essential for hydration an…
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there are three classes of sponges in the phylum porifera. which class …
Class Hexactinellida
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what are the two types of roots? select all correct options thin fibrou…
B. fibrous, C. tap
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the chart below shows the rabbit and fox populations in boxerville over…
B. May
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the root fixes the plant to the ______________.
soil
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complete the sentences with the correct terms from the word bank. word …
1. ecosystem 2. habitat 3. abiotic factors 4. biotic factors 5. climate
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vocabulary worksheet: abiotic and biotic factors match the term with th…
Habitat - d Ecosystem - c Climate - e Biotic Factor - a Abiotic Factor - b
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what type of organisms does the domain eukarya include? prokaryotic org…
All eukaryotic organisms
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read the information before answering the question. what type of organi…
Prokaryotic organisms that can live in harsh environments
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read the information and view the image before answering the question. …
Kingdom
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read the information and observe the image to answer the question. in t…
because advancements in molecular biology revealed significant genetic differences among organisms
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read the information and view the image before answering the question. …
from the broadest to the most specific
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read this paragraph from a passage. a genetically modified organism is …
A. A genetically modified organism is one whose genes have been altered.
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read the information and view the image before answering the question. …
Phylum
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read the information and view the image before answering the question. …
It distinguishes organisms right before the level of species, which is the most specific category.