Answer:
all the work in a given area
the energy required to do work
Explanation:
is the energy
Which of the following best helps scientists determine the order in which a species evolved? A) Type of fossil B) Geographic location of the fossil C) Location of the fossil in Earth's layers D) Species of the fossil
Answer: I’m pretty sure it’s the geographic location of the fossil. B
Explanation: Because when they die they go into the ground but then more layers of earth for and different species are shown but at different depths.
Classify each statement as an example of adhesion, cohesion, or surface tension. Drag each statement to the appropriate bin. A sewing needle floats when it is placed gently on top of water in a bucket. Water molecules ding to plant cell walls. A water strider runs across a pond without breaking the surface. A drop of water spilled on a table forms a drop on the table, rather than spreading out over the surface. Water molecules cling to the side of a beaker. Water molecules are attracted to each other.
Answer:
A sewing needle floats when it is placed gently on top of water in a bucket - surface tension
Water molecules ding to plant cell walls - adhesion
A water strider runs across a pond without breaking the surface - surface tension
A drop of water spilled on a table forms a drop on the table, rather than spreading out over the surface - cohesion
Water molecules cling to the side of a beaker - adhesion
Water molecules are attracted to each other - cohesion
Explanation:
The surface tension refers to the tendency of the surface of a liquid to remain unbroken by an external force due to the cohesive property of the molecules of the liquid. Instead of being broken, the surface of the liquid stretches like an elastic membrane.
The adhesive property of a liquid, also known as the force of adhesion, refers to the property of the molecules of the liquid to stick to other molecules while cohesive property or cohesion refers to the property of molecules of liquids to stick to themselves.
Hence,
Surface tension
A sewing needle floats when it is placed gently on top of water in a bucket.A water strider runs across a pond without breaking the surface.Cohesion
A drop of water spilled on a table forms a drop on the table, rather than spreading out over the surface.Water molecules are attracted to each other.Adhesion
Water molecules ding to plant cell wallsWater molecules cling to the side of a beakerWhich of the following components of the electron transport chain passes electrons to O2 and causing it to be reduced to H20?
A. Cytochrome c oxidase
B. Succinate -Q reductase
C. NADH
D. NADH-Q oxidoreductase
Answer:
The correct answer is option A, that is, cytochrome c oxidase.
Explanation:
A sequence of complexes, which conduct electrons from electron donors to electron acceptors through redox reactions, that is, both oxidation and reduction reactions taking place simultaneously is termed as the electron transport chain. This conduction of electrons is further combined with the mediation of protons across a membrane.
Four membrane-bound complexes are present within the mitochondria, of these in complex IV or cytochrome c oxidase, the withdrawal of 4 electrons takes place from 4 molecules of cytochrome c, and is mediated towards the molecular oxygen, which further gives rise to 2 molecules of water. During the process, 8 H+ are withdrawn from the mitochondrial matrix, which contributes to the proton gradient.
In a number sequence, the numbers are known as the _______.
Answer:
repeating numbers
hope this helps you
Which compound forms when carbon dioxide diffuses and reacts with seawater?
A. Carbonic acid
B. Hydroxide ions
C. Carbonate
D. Bicarbonate
Explanation:
the answer is carbonic acid .
Answer:
water and carbon dioxide
A single gene produces two different proteins, utilizing different exons. What is the most likely explanation?
Answer: Differences in mRNA splicing.
Explanation:
The exon is the region of a gene that is not separated during the cutting and splicing process and thus remains in the mature messenger RNA. In genes encoding a protein, it is the exons which contain the information to produce the protein encoded in the gene. In these cases, each exon encodes a specific portion of the complete protein, so that the set of exons forms the coding region of the gene. In eukaryotes, the exons of a gene are separated by long regions of DNA (called introns) which do not code.
RNA splicing is a post-transcriptional process of maturing RNA from which certain sequential fragments are removed. This process is very common in eukaryotes, and can occur in any type of RNA, although it is more common in mRNA. It consists of removing the introns from the primary transcript and then binding the exons. Particularly, alternative RNA splicing takes place when one gene can produce different proteins as a result of what segments are considered as introns and exons. When different segments are considered exons, the result is a great diversity of mature transcripts which produce different proteins.
So, gene splicing is a post-transcriptional modification in which a gene can code for many proteins, which makes it an important source of protein diversity.
what microorganisms have been used to make marmite? what microorganisms have been used to make bun? what microorganisms have been used to make cheese? what microorganisms have been used to make beer? what microorganisms have been used to make vinegar? what microorganisms have been used to make malt vinegar?
Explanation:
It is produced industrially by fermentation using yeast or bacteria. Marmite's defining ingredient is made from brewer's yeast heated to create glutamic acid, which is used by farmers to increase plant growth and boost crop yields.
what is biology class
Answer:
Biology is the branch of science that deals with the study of living organisms and vital processes
Explanation:
I ♥️ Biology class
Which statement about conjunction is true
Answer:
Hello...
Conjunctions are words that unite or connect parts of a sentence.
Hope it's help :)
The surgical fixation of a prolapsed vagina to a surrounding structure is known as a/an_______.
Answer: colporrhaphy
Explanation:that’s what the Mayo Clinic website said but idk... hope it helps!
What air pollution control devices reduce carbon monoxide and nitrogen oxide emissions from automobiles?
Answer:
Reduce the number of trips you take in your car. Reduce or eliminate fireplace and wood stove use. Avoid burning leaves, trash, and other materials. Avoid using gas-powered lawn and garden equipment.
Explanation:
I think this,,
The catalytic converter is a device that reduces carbon monoxide and nitrogen oxide emissions from automobiles.
What do you mean by Air pollution?Air pollution may be defined as the harmful organic and inorganic substances or particles present in the air.
The catalytic converter is a device that is placed in the vehicle's exhaust pipe for converting Carbon monoxide, nitrogen oxide, methane, and other harmful gases into less toxic gases.
Therefore, the catalytic converter is a device that reduces carbon monoxide and nitrogen oxide emissions from automobiles.
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If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes.
A. 4
B. 8
C. 12
D. 16
E. 24
If a sperm cell consist of 8 chromosomes, it comes from an animal that has 16 chromosomes. So, the correct option is (D).
What are Chromosomes?Chromosomes are defined as thread-like structures made of proteins and a single molecule of DNA that carry genomic information from cell to cell. In plants and animals, including humans, chromosomes reside in the nucleus of cells.
Each chromosome is made up of a single protein and a single deoxyribonucleic acid (DNA) molecule that is passed from parent to offspring, and contains specific instructions that make each type of living organism unique.
While sperm has eight chromosomes, the animal it comes from has 16 because the gametes received half the chromosomes from the parent cell.
Thus, if a sperm cell consist of 8 chromosomes, it comes from an animal that has 16 chromosomes. So, the correct option is (D).
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David suffers from a re-gurgitating mitral valve. this condition would cause:_______.a) increased cardiac output from the right ventricle. b) edema in the lower limbs. c) fluid congestion in the lungs. d) decreased heart rate. e) a bruit sound when ausculated with a stethoscope.
Answer:
The correct answer is: E) a bruit sound when auscultated with a stethoscope.
Explanation:
Mitral valve regurgitation is a condition in which the mitral valve - responsible for the blood flow from the left atrium to the left ventricle - doesn't close as tightly as it should, which can result in backward blood flow. If the condition worsens, this defect can lead to heart failure.
Mitral valve regurgitation may not have symptoms at first but, as the condition progresses, shortness of breath, fatigue, and palpitations can occur. When auscultated with a stethoscope, a bruit sound can be heard, which corresponds to the abnormal blood flow that is occurring.
If Brittany is investigating how fast Brian will react to three different sounds, the independent variable in the experiment is the time it takes brian to react
Answer:
This question is incomplete; the complete part is asking whether the statement about the independent variable is; True/False
The correct answer is False
Explanation:
In an experiment, the independent variable is the variable that the experimenter controls or manipulates in order to effect a change or bring about a response. The variable that responds to this manipulation is the dependent variable.
In this experiment involving Brittany, who is investigating how fast Brian will react to three different sounds, the independent variable is the DIFFERENT SOUNDS because that's the variable that Brittany changes in order to effect a response I.e. how fast Brian will react. Hence, the time it takes brian to react is rather the dependent variable.
Which of these classification categories contains the most closely related group of organisms?
A) domain
B) genus
C) family
D) phylum
E) kingdom
The organisms are classified into different categories based on the taxonomic level. The genus contains the most closely related organisms and groups. Thus, option B is correct.
What are taxonomic ranks?Taxonomic ranks are the grouping of the biological organisms based on the similarity shared by them and were proposed by Carl Woese. It has seven main ranks based on shared aspects.
The kingdom is the first rank that includes the broadest classification, including plants, animals, protists, monera, and fungi. The kingdom is followed by division, then class, followed by order, family, genus, and lastly species.
The genus is the rank from the list that will have the closely related organisms as the categorization of the shared characteristics increases down the ranks of the taxonomic classification.
Therefore, the genus has closely related organisms.
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Mary Beth bought 15 ghost shrimp. She put 5 in a small fish bowl, 5 in a larger tank, and 5 in an artificial pond in her backyard. What are the two controlled variables (CONSTANTS) Mary Beth should have to be able to tell whether the size of the tank affects the size of the shrimp after 6 months? growth of ghost shrimp and size of tank Initial age of ghost shrimp and water temperature Initial age of ghost shrimp and size of tank growth of ghost shrimp and water tempera
Answer:
Initial age of ghost shrimp and water temperature
Explanation:
In an experiment, there are several variables (alterable factors) that determine the outcome of the experiment. A CONTROLLED variable or CONSTANT is a variable that is kept constant or unchanged throughout the experiment. The constant is not changed because it can affect the other variables (outcome) of the experiment.
For this experiment conducted by Mary Beth on the effect of size of the tank on the size of the shrimp after 6months, the constants are INITIAL AGE OF GHOST SHRIMP and WATER TEMPERATURE. This is so because the ghost shrimps of the same initial age must be used to start the experiment, so as to be able to measure the actual effect on the growth. Also, the water in the respective tanks must be the same Temperature so that one experimental group will not be favored over another.
g A ________________ gradient is directly used to provide the energy for ATP synthesis in the mitochondria.
Answer:
Elerochemical gradient
Explanation:This coccus during the process of chemiosmosis in oxidative phosphorylation during cellular respiration. It is the electrochemical gradient that provides the energy needed by ATPase Synthase for the phosphorylation of ADP tp ATP, necessary for ATP production
The electochemical gradient is due to gradient produced from the pumping of protons by the proton motive force(PMF) into the intrammenbrane space. from the matrix.The accumulation leads the the production of electrochemical gradients because the Protons diffuse across from higher gradient in the intramembrsne space into the lower concentration gradient the matrix.Therefore,energy is produced as the diffusion takes place.
The ETC, is the source of generation of PMF, which pumps protons across into the intramembrane, for the electrochemical gradients productions
Transport of D- and L- glucose proceeds at the same rate down an electrochemical gradietn by which ofhte following processes?
a. simple diffusion.
b. facilitated diffusion.
c. primary active transport.
d. cotransport.
e. counter transport.
Answer:
Explanation:
Active transport is the movement of molecules or substance from a region of lower concentration to a region of higher concentration across a cell membrane against the concentration gradient.
Active transport requires cellular energy and are of two types:
primary active transport that uses adenosine triphosphate (ATP), and secondary active transport that uses an electrochemical gradient.
Active transport helps in the uptake of glucose in the intestines.
Cotransport or secondary active transport is the movement of molecules across a membrane it uses electrochemical potential difference that is created by pumping ions in or out of the cell.
Cotransport helps in the transport of glucose across the cell membrane.
Which domains contain organisms that lack a membrane-bound nucleus?a. Archaea & Bacteria b. Archaea & Eukaryac. Bacteria & Eukaryad. Eukarya & Animaliae. Archaea & Animalia
Answer:
Archaea and Bacteria lack a membrane-bound nucleus.
Explanation:
Archaea, bacteria lack a membrane-bound nucleus. Meaning, they are both prokaryotes. Eukaryotes and Animalia are the opposite. They have membrane-bound nuclei.
The nucleus is not membrane-bound in either the domain archaea or the domain bacteria, hence option A is correct.
What are prokaryotes?Single-celled creatures known as prokaryotes are found in the Bacteria and Archaea domains. Prokaryotic cells lack organelles, have no nucleus, and are significantly smaller than eukaryotic cells.
Archaeal cells, like other living things, have an exterior cell membrane that acts as a defense against the environment of the cell.
The cytoplasm, which is part of the membrane and contains the archeon's DNA, is where its life processes are carried out.
They contain a plasma membrane, ribosomes, and cytoplasm, in contrast, bacteria do not have cell membranes.
Therefore, the prokaryotic category of organisms includes bacteria, which are unicellular, hence option A is correct.
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What is the mass number of an ion with 109 electrons, 158 neutrons, and a +1 charge
Answer:
The mass number is 267.
Explanation:
It is given that,
Number of electrons are 109
Number of neutrons are 158
Charge is +1
We need to find the mass number of the ion.
We know that,
Mass number = No. of neutrons+ No. of protons
Also, No. of protons = No. of electrons = 109
So,
Mass number = 109+158 = 267
Therefore, the mass number is 267.
why do scientists usually try to work without making the animals aware that humans are present
HELP ASAP PLEASE
Answer:
In animal field studies, why do scientists usually try to work without making the animals aware that the humans are present? It is necessary to observe the animals without disturbing them. When a controlled experiment is not possible, why do scientists try to identify as many relevant variables as possible?
Explain relationship between adaptation and evolutionary change
A student conducts an experiment to test how the temperature affects the amount of sugar that can dissolve in water. In the experiment, she uses 100 milliliters of water in each trial and stirs for five minutes each time. What is the independent variable in this experiment? A. the time stirred B. the temperature of the water C. the amount of sugar D. the amount of water
Answer: B) the temperature of the water
Explanation: The independent variable is the one that is manipulated or changed
The independent variable in the experiment is B. the temperature of the water.
Variables in an experiment include two major types, which are:
Dependent Variable: Dependent variable receives the effect. It is the variable the researcher measures in an experiment. A change in the independent variable brings about a change in the dependent variable.Independent Variable: This is the cause in an experiment. A change or manipulation of this variable will bring a change in the independent variable in an experiment.From the experimental case stated in the question, the amount of sugar that dissolves is affected by the temperature of the water. This means, the amount of sugar that dissolves is dependent on the temperature of the water.
Therefore, the independent variable is the temperature of the water which is dependent on the temperature of the water.
The independent variable is B. the temperature of the water
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A period in 24-point font (.) is about 1mm in diameter. SARS-CoV-2 has a diameter of 80 nm. The prefix “milli” means 1000, which tells you there are 1000 millimeters (mm)in a meter. The prefix “nano” means 109 (1 billion), which tells you there are 1 billion nanometers (nm) in a meter. Approximately how many SARS-CoV-2 viruses could fit in that period? (Hint: There are 106nm in 1mm).
Answer:
Approximately 12,500 SARS-CoV-2 viruses
Explanation:
According to this question, the period described is 1mm in diameter. Since 1millimetre(mm) is 1000metre(m), this means that the period is 0.001m in diameter.
Also, the SARS-CoV-2 virus has a diameter of 80 nm (1nm = 10^9m).
Since 10^6nanometres (nm) or 1,000,000nm makes 1millimeter (mm), 80nm of the virus will be:
= 80/1,000,000
= 0.000080mm or 8 × 10^-5mm
To calculate how many of the SARS-CoV-2 virus will fit into the period, we divide the diameter of the period (in mm) by the diameter of the virus (in mm).
That is; 1 ÷ 8 × 10^-5
= 1/8 × 10^5
= 0.125 × 100,000
= 12,500
Therefore, approximately 12500 SARS-CoV-2 viruses will fit in the period.
alcohol_ both the central and peripheral nervous systems
Alcohol affects both the central and peripheral nervous systems.
_____________Explanation:
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Affects.What is conversed in a physical change
Answer:The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass. In a physical change, a substance's physical properties may change, but its chemical makeup does not.
Explanation:
Why can overfishing lead to ecosystem collapse? Will O A. Many mammals rely on fish for food. B. Eventually, it will lead to exponential growth. O C. Fish help maintain the temperature of the ocean. O D. The predators that rely on fish will increase in population.
n e w 8/28/2020
Answer:
many mammals rely on fish for food
Explanation:
what happens during telophase
Answer:
Telophase is the fifth and final phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During telophase, a nuclear membrane forms around each set of chromosomes to separate the nuclear DNA from the cytoplasm.
Why chloroplast called energy converting molecule?
Answer:
They use oxygen in the process of releasing chemical energy from sugars.
Explanation:
Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells. The entire process is called photosynthesis and it all depends on the little green chlorophyll molecules in each chloroplast.
They change either glucose energy of sunlight energy into something the cell can use.
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identify monomers and describe the function for all macromolecules
The first one is a lipid.
The second is a carbohydrate.
The third are nucleic acids.