Answer:
they lead to positive change in the population
During exponential growth, which of the following is true?
A) The larger a population, the slower it grows.
B) The larger a population gets, the faster it grows.
C) The size of the population has no effect on the growth of the population.
D) The population rapidly shrinks down to nothing.
Which type of scientific statement is defined as "a possible explanation or answer to a scientific question that is based on
prior knowledge or research and is testable"?
hypothesis
O theory
O law
O probability
why have 900 megahertz (mhz) industrial, scientific, and medical (ism) band wireless local area networks (wlan) lost favor in comparison to 2.4 gigahertz (ghz) and 5 ghz frequency systems?
900 MHz devices are more expensive and provide slower data output.
What is wireless local area networks (WLAN)?WLAN is defined as a wireless distribution of network used for two or more devices.
The industrial, scientific, and medical (ism) band is a WLAN that makes use of radio frequency
for domestic network purposes.
A gigahertz connection delivers more bits per second more than a megahertz connection.
Therefore, 900 MHz cannot be compared with 2.4 gigahertz (ghz) and 5 ghz frequency systems because 900 MHz devices are more expensive and provide slower data output.
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Which statement best describes scientists who contributed to the current body of science knowledge
The appropriate choice must be (A).
What is the role of scientists in society?Science contributes greatly to the generation of knowledge and hence contributes to the operation of democracies, fosters innovation and allows countries to be competitive in the global economy.
The ongoing work of men and women from various nations throughout history has contributed to the existing body of scientific knowledge.
It is not simply wealthy men with money who could conduct experiments and get a scientific conclusion. We are all familiar with Marie Curie, who is renowned for her work in radioactivity and twice earned the Noble Prize.
Of course, advances in science have been accomplished before to the 20th century; for instance, Newton discovered gravity in the 17th century.
Therefore, the existing body of scientific knowledge is not constrained by specific limitations; rather, it is the result of ongoing efforts made by men and women from various nations throughout history.
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According to the chemiosmotic hypothesis, what provides the energy that directly drives atp synthesis?.
Explanation:
According to the chemiosmotic hypothesis, ATP is produced by due to the proton gradient created across the mitochondrial membrane. The essential components required for chemiosmosis are proton pump, proton gradient and ATP synthase. ATP synthase is an enzyme which helps in ATP synthesis. The enzyme ATP synthase has two part
F0 andF1.F0 is the part which transports protons across the membrane as a transmembrane channel while configuration changes in F1
activates the enzyme. They phosphorylate ADP i.e., add one more phosphorus group to the ADP and converts ADP(adenosine diphosphate) to ATP (adenosine triphosphate). The proton gradient developed across the membrane is the driving force of ATP synthase.
Which characteristic is used to measure the amount of light radiated by a star?
size
color
luminosity
temperature
When your body goes into fight-or-flight mode, what happens to the oxygen that is in your brain?.
Answer:
Fight or flight
The amygdala activates this fight-or-flight response without any initiative from you. When that part of your brain senses danger, it signals your brain to pump stress hormones, preparing your body to either fight for survival or to flee to safety.
Beneficial micro-organisms that are responsible for breaking down organic matter are called?.
Which two species produce fewer offspring, each of which has a high chance of surviving to maturity?
A. Specialist species
B. Generalist species
C. R-selected species
D. K-selected species
Answer:
I think the answer is K.
Explanation:
R Species produce more offspring. Whereas K species produce fewer species due to carrying capacity.
I hope this helps! Correct me if I am wrong.
What conclusion about the bacteria domain could be made from the phylogenetic tree below?
Plants and animals evolved from the Bacteria domain.
Bacteria and Eukarya are more similar than Archaea and Eukarya.
Bacteria and Archaea have similar evolutionary traits.
Eukarya and Bacteria developed on the same evolutionary line.
The correct answer is Eukarya has similar evolutionary traits to Archaea.
Thus, option "D" is correct.
What is the six kingdom classification by Carl Woese?The six kingdom classification by Carl Woese divided the organisms into three domains which are Bacteria, Archaea, and Eukarya. the archaea and Eubacteria are micro-organisms while plants, animals, and microorganisms such as fungi and protists under Eukarya.
The Eukaryotes are more closely related to the Archaea than bacteria as:
1. Transcription - they both use same TATA-binding proteins-TFIIB and elongation factors.
2. Translation- First amino acid during protein synthesis is the same in both the organisms which is methionine.
3. Histones - same histones are involved in the packaging of DNA.
4. Sensitivity to antibiotics- both are insensitive to antibiotics.
Thus, Eukarya has similar evolutionary traits to Archaea is the correct answer, option "D" is correct.
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Which does NOT describe bacteria? one niet
A They are prokaryotic cells.
B They have cell walls and cell membranes.
C Their genetic material is found in the cytoplasm.
D They have membrane-bound organelles.
Answer:
D they have membrane bound organelles
Explanation:
- Beaker A has 5% salt; Beaker B has 10% salt; Beaker C has 20% salt. Which beaker has
a higher concentration
A. beaker A
C. beaker C
of water?
B. beaker B
Answer: C. Beaker C
Explanation:
Because there is more of salt, the solute in the the solvent, water.
Scientists group organisms into kingdoms by looking at specific characteristics. Thermus aquaticus, shown below, is a specialized bacteria called a thermophile. Thermophiles are microorganisms that can live in bodies of water that are extremely hot, such as deep sea hydrothermal vents.
A microscopic image of thermus aquaticus.
Which characteristic most likely describes a mushroom but not Thermus aquaticus?
cell wall
eukaryotic
unicellular
prokaryotic
Eukaryotic is the characteristic most likely describes a mushroom but not Thermus aquaticus because it is a is prokaryotic organism.
What are eukaryotic organisms?Eukaryotic organisms are life forms that are characterized to have cell nuclei and membrane-bound organelles.
Eukaryotic organisms can be either unicellular or multicellular (e.g. plants and animals).
In conclusion, Eukaryotic is the characteristic most likely describes a mushroom but not the bacterium Thermus aquaticus.
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A conservationists states that "we need to preserve the ocean because 95% of it is yet unexplored". why is ocean exploration important to human society? back your claim by giving three specific examples of how ocean exploration has resulted in the development of technologies that can potentially benefit human society.
Explanation:
Ocean exploration technology has advanced much more than before in the past decade.Ocean exploration can help with monitoring the deep sea.So much ocean explored by scientists begin to propel prediction of marine creatures numbers and direction of environment change, which finally keeps biological balance.Humans actively develop other ocean resources to resolve ore resources and ocean energy resources as one of benefits deep sea exploration.
X
-6
-1
0
3
y
-7
1
9
-2
What is the domain of the given function?
O {x|x = -6, -1, 0, 3}
(y ly=-7, -2, 1, 9}
{x|x=-7, -6, -2, -1, 0, 1, 3, 9}
(y ly=-7, -6, -2, -1, 0, 1, 3, 9}
1
Answer:
-1
Explanation:
(y ly=-7, -6, -2, -1, 0, 1, 3, 9}
1
Transcribe the following DNA sequence into its corresponding base pair strand: 5'-ATGGCCGGTTATTAAGCA-3'?
Answer:
3' -TACCGGCCAATAATTCGT- 5'
Explanation:
A with T, G with C
Four different thermometers were used to measure the temperature of a sample of impure boiling water. The measurements are recorded in the table below.
Thermometer Temperature
Reading 1 Temperature
Reading 2 Temperature
Reading 3
W 100.1°C 99.9°C 96.9°C
X 100.4°C 102.3°C 101.4°C
Y 90.0°C 95.2°C 98.6°C
Z 90.8°C 90.6°C 90.7°C
The actual boiling point of pure water is 100.0°C.
What can be concluded from the data about the reliability and validity of the thermometers?
A.
Thermometer W is the most reliable.
B.
Thermometer X has the highest validity.
C.
Thermometer Z is the most reliable.
D.
Thermometer Y has the highest validity.
Reliability is another name for the precision of the measurement, and it means how well the value is repeated; this is, how close the different measurements are to each other. If the measurements are close one to each other, then the instrument is precise or reliable (high reliability).
Validity is another name for the accuracy of the measurement; this is, how close the measurement is to the true or accepted value.
With that, we can compare the reliability (precision) and validity (accuracy) of the four different thermometers.
Repeat the table:
Temperatures in °C:
Thermometer Reading 1 Reading 2 Reading 3
W 100.1 99.9 96.9
X 100.4 102.3 101.4
Y 90.0 95.2 98.6
Z 90.8 90.6 90.7
Reliability:
To analyze reliability (precision) we must compare the measures of every thermometer among them. A good approximation can be made calculating the range, i.e. the difference between the largest and the smallest readings:
For W: largest reading - smallest reading = 100.1°C - 96.9°C = 3.2°CFor X: largest reading - smallest reading = 102.3°C - 100.4°C = 1.9°CFor Y: largest reading - smallest reading = 98.6°C - 90.0°C = 8.6°CFor Z: largest reading - smallest reading = 90.8°C - 90.6°C = 0.2°CNow, you conclude that the most reliable is thermometer Z and the least reliable is thermometer Y. The complete ranking, from most reliable to least reliable is:
Z > X > W > Y
Validity:
To determine validity you must compare the mean of the three measures for each thermometer with the accepted value for the boiling point of pure water (100.0°C).
The mean is the sum of the three readings divided by 3.
The absolute error is calculated with the formula:
absolute error = | accepted value - calculated value |.
The calculated value is the mean.
For W: mean = (100.1 + 99.9 + 96.9)°C / 3 = 99.0°C
absolute error = 100.0°C - 99.0°C = 1.0°C
For X: mean = (100.4 + 102.3 + 101.4)°C / 3 = 101.4 °C
absolute error = 101.4°C - 100.0°C = 1.4° For Y: mean = (90.0 + 95.2 + 98.6)°C / 3 = 94.6°C
absolute error = 100.0°C - 94.6°C = 5.4°C
For Z: mean = (90.8 + 90.6 + 90.7)°C / 3 = 90.7°C
absolute error = 100.0°C - 90.7°C = 9.3°C
Now you can rank the thermometers as per their validity (accuracy):
1.0°C < 1.4°C < 5.4°C < 9.3°C
Thus, W is the most accurate, X is the second most accurate, Y is the third, and Z is the least accurate.
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Because one of the two strands of a replicated DNA molecule is newly synthesized and the other is the original template, DNA replication is said to be a ______ process.
Because one of the two strands of a replicated DNA molecule is newly synthesized and the other is the original template, DNA replication is said to be a semi-conservative process.
What is DNA replication?DNA replication may be defined as the biological process that involves duplicating a DNA molecule comparable to the construction of two DNA molecules.
DNA replication is proceeded by the semiconservative model, which means that the parental double helix is half conserved, and each parental single strand remains intact.
Therefore, it is well described above.
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Identify the structures of the neuromuscular junction
The structures of the neuromuscular junction are apresynaptic region; synaptic cleft and postsynaptic region.
What is the neuromuscular junction?The neuromuscular junction is where a nerve ending joins skeletal muscle tissue. Muscle contraction signals are initiated by chemicals, such as the neurotransmitter acetylcholine, that are transferred from the nerve ending, or motor end plate, to the muscle.
The importance of neuromuscular junctions is the synapse region between skeletal striated muscle fiber and motor axon; whose function is the transmission of the nerve impulse.
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Why is acetylcholine broken down?
Acetylcholine broken down is the process by which this neurotransmitter activates a suitable ligand-receptor to trigger a cell signaling pathway.
What is Acetylcholine?Acetylcholine is a chemical messenger (i.e., a neurotransmitter) that is used to transmit signals inside the body.
Acetylcholine broken down is due to its hydrolysis, which ends cell signaling between brain synapses.
In conclusion, Acetylcholine broken down is the process by which this neurotransmitter activates a suitable ligand-receptor to trigger a cell signaling pathway.
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Membrane proteins that bind to signal by which cells communicate are called
Membrane proteins that bind to signal by which cells communicate are called receptors are generally transmembrane protein.
What is the function of the stop sequence to a transmembrane protein?When the protein presents an internal signal sequence (SSI), this sequence, in addition to directing the transport of the translational complex to the REG, will also act as an SPT, with the carboxy-terminal portion of the protein facing the lumen. from the reticulum or into the cytosol.
in this case, many transmembrane proteins function as gateways to permit the transport of specific substances across the membrane.
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The process by which ____________ become activated when the ____________ within the discs of the cells are altered by light entering the eye is ____________ . The photoreceptor responds to ____________ stimulation by changing its resting membrane potential, resulting in a change in the ____________ it releases.
The process by which photoreceptors become activated when the photopigments within the discs of the cells are altered by light entering the eye is phototransduction.
How to explain the receptor?The photoreceptor responds to light stimulation by changing its resting membrane potential, resulting in a change in the neurotransmitters that it releases.
It should be noted that receptors bind to ligands and causes response in the immune system.
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Arrange the following events that occurred during the French and Indian War in chronological order.
the British gain control of St. Lawrence River
the Battle of Monongahela River
the battle for the city of Quebec
the siege of Fort William Henry
↓
↓
↓
1. Monongahela River
2. Fort William Henry
3. British gain control of the St. Lawrence River
4. Battle of Quebec
What is the Battle of Monongahela River?All battles given were between the French and British. However, the two battles that happened prior to 1756 were the Battle of Monongahela River and the Battle of Lake George. The first battle happened on July 9, 1755. It was won by the French and Indian troops against the British and Americans. The second battle happened on September 8, 1755. It was won by the British, and is considered their first major victory against the French troops.
Thus, this could be the answer.
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Organisms that are distributed
evenly across the environment
have a
dispersal
pattern.
A. uniform
B. clumped
C. random
What day is considered to be the first day of a female's reproductive cycle?
• When hormone levels are low and the uterus lining is shed.
• When hormone levels are high and the uterus lining is shed.
• When hormone levels are low and the ovary releases an egg.
• When hormone levels are high and the ovary releases an egg.
Question: What day is considered to be the first day of a female's reproductive cycle?
Answer: When hormone levels are low and the uterus lining is shed.
The first day of a female's reproductive cycle is when hormone levels are low and the ovary releases an egg. This is known as ovulation and is the most important part of a woman's menstrual cycle.
What happen during ovulation?During ovulation, the egg's follicle bursts open and is released, travelling down the fallopian tube towards the uterus.
If the egg is fertilised, it will implant in the uterus and a pregnancy will begin; if it is not, it will be reabsorbed by the body, and the cycle will restart.
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Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree.
Charles is a blank box with a Upper X Upper H Upper Y genotype and Marie is a half-filled circle with a X Upper H x h genotype.
What is the probability that a female child of Charles and Marie would suffer from hemophilia?
0 percent
25 percent
50 percent
100 percent
The probability that a female child of Charles and Marie would suffer from hemophilia is 0 percent.
What are X-linked diseases?X-linked diseases are diseases whichabre found only on the X chromosomes.
Hemophilia is an X-linked recessive disorder (Xh)
Charles is has the normal X chromosome YXH
Marie is a carrier of the disease XHXh
A cross between YXH and XHXh will not produce any XhXh.
Therefore, the probability that a female child of Charles and Marie would suffer from hemophilia is 0 percent.
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What are the most primitive surviving vertebrates?
The most primitive surviving vertebrate are those in the Agnatha class.
AgnathaThis refers to a group of fishes that are jawless. They include lampreys and hagfishes.
Fishes in the Agnathan class have no fins nor stomachs.
Hagfishes still exist with over 76 species in different cold waters around the world.
Lampreys live mostly as parasites on other fishes and are found in the Atlantic oceans.
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Select the correct answer. A force of 15 newtons is applied to both Object A with a mass of 25 kilograms and Object B with a mass of 50 kilograms. What is true about the acceleration of Object A and Object B? A. Acceleration of Object A is four times that of the acceleration of Object B. B. Acceleration of Object A is the same as the acceleration of Object B. C. Acceleration of Object A is half the acceleration of Object B. D. Acceleration of Object A is twice that of the acceleration of Object B.
By Newton's second law
F=ma , F=force (unit= N)
m=mass (Kg), a=acceleration (m/s2)
By applying the formula, we can calculate acceleration
a = F/ m
For object A,
Force =15N, Mass=25kg
a= 15/25
acceleration, a=0.6m/s2
For object B,
Force=15N, Mass=50 kg
a=15/50
acceleration,a=0.3m/s2
By calculation, the acceleration of object A is twice the of object B.
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Answer:
See image
Explanation:
Plato
What organisms comprise the invertebrate chordates?
The invertebrate chordates include Tunicates and lancelets.
What are invertebrate chordates?They are a group of chordates that possess notochords somewhere in their life span but end up not possessing the vertebral column. They possess all the characteristics of chordates.
Invertebrate chordates include the Urochordata which are the Tunicates and the Cephalochordata which are the lancelets.
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The receptor cells for vision are located in the _____ and are called _____ and _____
The receptor cells for vision are located in the retina of the eyes and are called rods and cones.
What are receptor cells?
Receptor cells are proteins found either inside a cell or on its surface which receive a signal.
The two primary photoreceptor cells are rods and cones and they contribute to the information used by the visual system to form a representation of the sight.
They are found in the retina of the eye.
Therefore, the receptor cells for vision are located in the retina of the eyes and are called rods and cones.
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