Answer:
A natural resource is something found naturally that can be used by humanity to accomplish tasks. For example, wood is a natural resource as its found in nature and can be used by humanity for building and making fire for food and heat.
Explanation:
Need help on this question
Answer:
the answer is B. Antigenic drift
For a mitocondria.
The hydrogen ion reservoir is located in the ______________________________ and ATP is synthesized in the ____________________.
Answer
For a mitocondria.
The hydrogen ion reservoir is located in the matrix and ATP is synthesized in the inner mitochondrial membrane.
How do the zones in a school of fish benefit them?
A. This allows them to move more quickly when being attacked by a predator.
B. This allows them to move in unison, so that when one moves in a zone every zone shifts.
C. This helps them filter feed.
D. This allows them to protect young in the center of the group.
Answer: B. This allows them to move in unison, so that when one moves in a zone every zone shifts.
Explanation:
Which of the following best explains a way that a molecular clock can be used?
A) The number of DNA mutations in an organism is measured over time to determine how long it will take for a new species to evolve.
B) The number of DNA mutations in a species is compared to the number of DNA mutations in another species to determine the relative amount of time each species has been evolving.
C) The number of differences in a specific DNA sequence of two species is multiplied by a known mutation rate to determine the number of years of evolution that separate the two species.
D) The number of differences in the DNA sequences of two organisms of the same species is averaged to determine how many years of evolution have occurred.
According to the research, a molecular clock can be used to determine the number of differences in a specific DNA sequence of two species (c).
What is a molecular clock?It is a tool that allows us to relate the divergence time or the time elapsed since the divergence of two current lineages from their common ancestor.
It is based on analyzing and comparing the genetic material of organisms to establish the number of mutations.
Therefore, we can conclude that a molecular clock can be used to determine the number of differences in a specific DNA sequence of two species (c).
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What is thWhich is a structure that directs the cell's activities?e basic unit of structure and function of all living organisms?
The nucleus is the structure that directs the cell's activities of living organisms.
What is Nucleus?This is an organelle which is usually membrane bound and contains the chromosomes.
It is involved in the control of the synthesis of proteins thereby aiding the directing of the cell activities.
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3. What does the name protozoa mean?
first organism
first animal
first cell
first microbe
What does the biodiversity of genes refer to?
A. the variety between individuals, even within a species
B. the variety between species
C. the variety between identical twins and triplets
Answer:
B
Explanation:
genetic diversity is the biological variation that occur within species
Use the information below to answer the following question(s). In a survey, the rate of heavy smokers was reported as 270 per 1000 individuals.
If two individuals are randomly selected, find the probability that neither of them is a heavy smoker.
Assume that having a child with brown eyes or blue eyes is equally likely and that eye color is independent of the other children. What is the probability of having 5 children with brown eyes?
The probability that neither of them is a heavy smoker is 0.53 or 53%
What is genetic probability?Probability serves to mathematically estimate the possibility of events that happen by chance, that is, as a matter of luck.
In this case:
Probability that selected one is heavy smoker is:
p=270/1000=0.27
Number of individuals selected is 2 and We know that:
P(X=x)=nc_x(1-p)^{n-x}(p)^x
We need to prove that X=0:
P(X=0)=nc_0(1-0.27)^{2-0}(0.27)^0
P=0.5329
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What is the renewability of geothermal power?
It is a nonrenewable energy source.
It is an unlimited, clean energy source.
It can be replenished by splitting nuclei.
It can use the same fuel cells repeatedly.
During and after photosynthesis, energy changes from one form to another in a series of steps. Which step related to this energy transformation occurs second?
The step that relates to the energy transformation in photosynthesis is respiration.
What is respiration?Respiration is the process whereby the chemical energy locked up in carbohydrates is unlocked into another energy form that is usable to living organisms.
In other words, chemical energy in carbohydrates is converted to ATP. This process can take place with (aerobic respiration) or without (anaerobic respiration) oxygen.
Carbohydrates are primarily generated from photosynthesis by green plants.
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The lens of a person's eye becomes thinner as the person watches a train leave. This is an example of _________________________.
Answer:
Refraction
Explanation:
The lens is pulled thin, allowing the light rays to refract slightly.
Complete the punnet square.
If we were to cross a heterozygous mouse with a homozygous recessive mouse, what would the probability of offspring genotypes be ?
Fill in the PERCENTAGE of the probability for EACH GENOTYPE on your show your work worksheet .
The probability of the offspring will be 50%, 50%, and 0% respectively.
Probability in geneticsIt seems the allele for the trait in question is F(f) from the image.
One parent is heterozygous while the other is homzygous.
Ff x FF
FF FF Ff Ff
Probability of FF = 2/4 or 50%
Probability of Ff = 2/4 or 50%
Probability of ff = 0
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The percentage of each genotype is;
Ff = 50%ff = 50%What is a cross?A cross is a system by which the genotype of an organism can be ascertained.
We are told that this cross is between a het--erozygous mouse with a hom--ozygous recessive mouse. Thus we have Ff and ff.
We now have the percentage of each genotype as;
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As a consequence of infection by a temperate bacteriophage such as lambda, the host cell:.
The host cell may lyse or may continue to divide and replicate both itself and the prophage.
What is the effect of temperate bacteriophage on a host cell?Lytic cycle:
The infecting phage kills the host cell at the end of the lytic cycle, also known as a virulent infection, to create a large number of its own offspring. The phage genome immediately produces early proteins that degrade the host DNA after being injected into the host cell, enabling the phage to take over the cellular machinery.
The remaining proteins needed to construct fresh phage particles are subsequently synthesized by the phage using the host cell. The new genetic material is packed into the head while new daughter phage particles are built, and the heads and sheaths are created independently. In the course of this process, phage enzymes gradually weaken the host cells, which eventually burst, dispersing 100–200 additional phage progeny into the environment.
Lysogenic cycle:
The lysogenic cycle, also known as temperate or non-virulent infection, uses the host cell as a haven where it can survive in a latent state. It does not harm the host cell. After the phage DNA is injected into the host cell, it uses integrases encoded by the phage to integrate into the host genome, at which point it becomes known as a prophage.
The host cell divides for the duration that it is there and does not create the proteins necessary to make progeny, at which point the prophage genome is passively copied alongside the host genome. The bacterial hosts are typically somewhat unaffected by this procedure because the phage genome is typically quite tiny.
I understand the question you are looking for is this:
As a consequence of infection by a temperate bacteriophage such as lambda, the host cell
lyses as a result of bacteriophage release.never lyses but continues to divide and replicate both itself and the prophage.divides faster at moderate temperatures.may lyse or may continue to divide and replicate both itself and the prophage.Learn more about bacteriophages here:
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which of these should be reportable reasons to protect public health?
a) Skin cancer
b) Heart disease
c) HIV
d) Diabetes
Among the following HIV should be reportable reasons to protect public health.
HIV impairs the body's defenses against infections and leads to AIDS. Contact with contaminated blood, or fluids might result in the virus being spread. Flu-like symptoms including fever, sore throat, and exhaustion might appear a few weeks after HIV infection. Until AIDS develops, the illness is typically asymptomatic. Fatigue, fever, night sweats, and weight loss are a few of the signs and symptoms of AIDS. Despite the fact that there is no known treatment for AIDS, diligent adherence to anti-retroviral therapy (ART) can significantly decrease the disease's progression, avoid complications and secondary infections, and lengthen life. One of the primary tactics used in the prevention and control of HIV/AIDS around the world is the dissemination of information and awareness about HIV.
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While most other organisms obtain energy from food, plants get their energy from the sun. Would you support research to genetically modify humans to be able to use photosynthesis for part of our energy and reduce the amount of food we need?
I need 3-5 sentence answer.
No, I won't support research to genetically modify humans to be able to use photosynthesis for part of our energy and reduce the amount of food we need.
What is Photosynthesis?This is the process in which green plants manufacture their food in the presence of sunlight.
The research won't be supported as a result of the absence of the digestive system to suit the product and reducing amount of food needed will lead to wastage.
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Use the sample data below to answer the following question(s). Biologists studying the re-vegetation of two species of succulent plants in the South African desert examined the number of plants that survived depending on whether they were planted in multi-species clumps or planted alone. The following data resulted:
Planted in Planted
Multi-Species Clumps Alone
Number of Species 1 Survived 64 87
Number of Species 2 Survived 34 47
If two different surviving plants are randomly selected, find the probability that they both were species 1.
If two different surviving plants are randomly selected, find the probability that they both were planted alone.
The probability that they both were planted alone is 0.3325.
What is genetic probability?Probability serves to mathematically estimate the possibility of events that happen by chance, that is, as a matter of luck.
In this case:
Number of plants planted alone = 134P(both plants were planted alone) = 134/232 x 133/231 = 0.3325So the probability that both were planted alone is 0.3325.
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In this type of passive transport, materials may have their movements helped by membrane proteins.
Facilitated diffusion
Simple diffusion
Simple diffusion
Exocytosis
Answer:
Facilitated diffusion
Explanation:
Diffusion across a membrane, along a concentration gradient via membrane protiens. No energy is required hence passive.
During transcription, mRNA is produced from the antisense strand of DNA. This means that the mRNA will match the
please answer only if you are sure
A)
antisense strand of DNA, substituting thymine for uracil.
B)
antisense strand of DNA, substituting uracil for thymine.
C)
sense strand of DNA, substituting uracil for thymine.
D)
sense strand of DNA, substituting thymine for uracil.
Answer:
C) sense strand of DNA, substituting uracil for thymine.
Explanation:
The antisense strand matches the sense strand. Thymine is only used in DNA while Uracil is only used in RNA.
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The cichlid is a colorful fish found in freshwater lakes. There are over a thousand species of cichlid fish today. If a species of cichlid became extinct, the niche the fish filled within the ecosystem would be left open. Explain how an available niche after extinction can lead to speciation.
An available niche after extinction can lead to speciation because it allows the emergence of genetic variation in other competing species.
What is speciation?Speciation is a slow process associated with the emergence of reproductive isolation barriers in a population.
These barriers lead to the absence of gene flow and eventually to the emergence of new species.
In conclusion, an available niche can lead to speciation in other competing species.
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DescDescribe the evidence for endosymbiosis that is present in eukaryotic cells today. ribe the evidence for endosymbiosis that is present in eukaryotic cells today.
The evidence for endosymbiosis present in eukaryotic cells is associated with the presence of mitochondria and chloroplasts.
What is the endosymbiosis theory?The endosymbiosis theory is a theory in biology that states eukaryotic cells evolved as a consequence of symbiotic relationships between prokaryotes and primitive eukaryotes.
The endosymbiosis theory is supported by mitochondria and chloroplasts, which contain their own genetic material, ribosomes and a similar size when compared to bacteria.
In conclusion, the evidence for endosymbiosis is associated with the presence of mitochondria and chloroplasts.
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What have you learned about the burying beetle and other insects that make them important to “The Natural World”?
Answer: Burying beetles are true to their name—they bury the carcasses of small vertebrates such as birds and rodents as a food source for their larvae.
Explanation:
they are on the endangered species list
jane goodall said that they are "nature's most efficient recyclers."
The American burying beetle is one of nature's most efficient recyclers, feeding and sheltering its own brood while returning nutrients to the earth to nourish vegetation and keeping ant and fly populations in check.
populations of prairie chickens and passenger pigeons have been reduced by the loss of the burying beetle.
biologicaldiversityorg
quizlet
THINKING
1. A protease which is protein in nature:
A. Lipase
C. Gastrin
B. Enterokinase
D. Amylase
Answer: D. Amylase
Explanation:
Amylase is a enzyme that breaks down protein present in food.
Classify the following organisms as eubacteria,archebacteria, Protists,fungi or other
Eubacteria and archaebacteria are organisms from the Archaea domain, whereas protists and Fungi belong to the Eukarya domain.
What are prokaryotic organisms?Prokaryotic organisms such as eubacteria (E coli) and archaebacteria (methanogens) are unicellular microorganisms whose cells do not have a cell nucleus.
Conversely, eukaryotic cells such as protists (giardia lamblia) and fungi (Yeast) have the genetic material inside the cell nuclei and membrane-bound organelles.
In conclusion, eubacteria and archaebacteria belong to Archaea, whereas protists and Fungi belong to Eukarya.
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Design an imaginary food web or describe a real one. Include at least 4 living organisms that interact in your ecosystem.
The trophic web is the interaction between different organisms in which there is energy transference. In the attached example, we consider plants, beetle, rabbit, frog, eagle, fox, mountainlion, and fungi.
What is the trophic web?The trophic web is the interaction between different organisms involving transference of energy when some of them feed on the other ones.
The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
• The first link corresponds to a producer organism -autotroph-.
• The following links are the consumers -heterotrophs- ⇒ herbivores and carnivores.
• The last links are the decomposers that degrade organic matter from dead organisms.
Because it is a web, all organisms are in equilibrium until a change occurs. When a sudden change affects any of the involved links, there can be a cascade effect on the web.
Any change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
Example.
To make the trophic web, first, we need to have at least four links.
So first, let us list the organisms we are working with, and then define the position of each of the organisms on the web.
plants,beetle,rabbit,frog,fox,mountain lion, eagle,FungiProducer → this is the autotroph organism that takes energy from the sun or any other inorganic source → An example of this is any plant.
Consumers → heterotroph
⇒ Herbivores → These are the animals that feed on any part of the plants → These are the beetle and the rabbit
⇒ Carnivores → These are the animals that feed on herbivores → These are the frog, the fox, the eagle, and the mountain lion
Decomposer → detritivorous organisms that take energy from dead matter → Fungi
Trophic web,
Plants directly provide energy to the beetle and the rabbitPlant >> Beetle and Rabbit
The eagle takes energy from the rabbit and the frog takes energy from the beetle.Rabbit >> Eagle
Beetle >> Frog
The fox takes energy from the frog and from the rabbitFrog and rabbit >> Fox
The Fox and the eagle transmit energy to the mountain lion.Fox and Eagle >> Mountain lion
Fungi takes energy from dead organic matterPlants, beetle, Rabbit, Fox, Eagle, Mountain lion >> Fungi
You will find an image in the attached files.
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NAD+ is a limiting factor in glycolysis. In the absence of ____________________ the conversion of (1) ____________________ to NAD+ via the ______________________________ is prevented from happening.
In the absence of ADP, the conversion of NADH to NAD+ via the electron transport chain is prevented from happening.
What is glycolysis?Glycolysis is the series of reactions by which glucose is broken down to pyruvate by the body.
NAD+ is a limiting factor in glycolysis. In the absence of ADP, the conversion of NADH to NAD+ via the electron transport chain is prevented from happening.
In conclusion, NAD+ is a limiting factor in glycolysis.
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what is this a picture of
watershed
wetland
sinkhole
Answer:
it's a watershed
Explanation:
basically it's a channel that drains/carries runoff to a common point like the lake in the picture. water, sediment, and other materials are carried by the river to the lake.
A person with a traumatic brain injury now exhibits some symptoms including
erradic, impulsive behavior, worse judgement than usual of risky situations, and odd
social behaviors and violent mood swings. Based on these symptoms, which area of
the brain was most likely invovled in the injury?
A. Temporal lobe
B. Cerebellum
C. Frontal lobe
D. Thalamus
Answer:
C. Frontal lobe
Explanation:
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The frontal lobe of the brain, behind the forehead, is strongly associated with motor function, spontaneity, impulsive behavior, judgement decisions, and social behaviors and mood.
Claim and evidence:
What would happen to the effectiveness of an original vaccination if a mutation in the virus caused the protein spike to change ?
Make a claim that answers the question, then support that claim with evidence. What did you learn about mutations that would support your claim ?
Answer__________________
______________________
____________________
________________________
____________
It would happen that the effectiveness of an original vaccine could become less if there was a mutation in the virus that caused the protein spike to change because the antibodies created would not be specific for the new virus.
What would happen to the mutated virus?Vaccines trigger an immune response to fight disease-causing organisms, a mutation in the virus to be fought would change the effectiveness of this immune response, as the specificity would not be the same with the mutant virus.
With this information, we can conclude that The immune response would not be specific for the new virus that caused the protein spike to change.
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A tonicity with a high concentration of solutes is said to be _________. hypertonic isotonic selectively permeable hypotonic
Answer:
Hypertonic
Explanation:
A tonicity with a high concentration of solutes is said to be Hypertonic.
I hope it helps! Have a great day!
Pan~
Tonicity with a high concentration of solutes is said to be hypertonic.
Tonicity is the ability of an extracellular solution to allow the movement of water in and out of the cell by osmosis. The terms hypertonic, isotonic and hypotonic decide the movement of water into or out of the cell.
The hypertonic solution is a kind of solution which has a high concentration of solutes (salts, electrolytes). In Biology, a cell is said to be in a hypertonic solution if the outside solution has a high concentration of solutes than the inside the cytoplasm of the cell. In this situation, there will be a net flow of water out of the cell.
The hypotonic solution is a type of solution which has a low concentration of solute. ). In Biology, a cell is said to be in a hypotonic solution if the outside solution has less concentration of solutes than the inside the cytoplasm of the cell. In this situation, there will be a net flow of water into the cell.
Isotonic solution is one which has the same concentration of water and solutes as inside the cytoplasm of a cell. If a cell is placed in an isotonic solution, there is no net water movement.
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Two fully heterozygous fruit flies are crossed. Complete the Punnett square and provide the probabilities for the genotype and phenotype for the offspring.
B= brown body
b= black body
E= red eyes
e= brown eyes
Please provide the probability in percentages
Fill in the blanks using the show your work tools
Answer:
Blanks in the boxes (left to right, top to bottom, as you would read)
BbEE
BbEE
BbEe
bbee
Genotypes (top to bottom blanks):
12.5%
6.25%
6.25%
Phenotype (top to bottom blanks):
56.25%
18.75%
18.75%