Answer; sample answer;
(Answers may vary.)
The town I live in has a river flowing near one of the schools. A few months back, residents noticed that pollutants were contaminating the river water. The residents identified the pollutants as the waste released from a newly constructed factory. The contamination is of prime concern to our town, because the river water is used as the public water supply to the nearby school. Therefore, the polluted water needs to be treated on priority to reduce health risks to the schoolchildren. In addition, the newly constructed factory needs to stop releasing waste into the river water. The following scientists can help address this environmental issue:
A geologist can investigate how the pollutants are transported to the river.
An ecologist can help determine how species are affected by pollution.
A chemist can investigate the biodegradation of the pollutants.
A soil scientist can investigate soil contamination or soil erosion occurring due to the pollution.
An environmental engineer can help design a water treatment system to remove the pollutants.
An economist can investigate and report the impact of the environmental issue on the local economy.
Explanation: edmentum/plato
A scientist observes two cells. Cell 1 and Cell 2 both contain DNA (genetic material) and ribosomes. However, Cell
1 contains a nucleus and other membrane-bound organelles, which Cell 2 does not
What is the correct classification for each of the cells?
A
Cell 1 - Eukaryotic, Cell 2 = Prokaryotic
B
Cell 1 = Prokaryotic, Cell 2 = Eukaryotic
с
Cell 1 = Eubacteria, Cell 2 = Archaea
D
Cell 1 = Archaea, Cell 2 = Eubacteria
Answer:
A - Cell 1 - Eukaryotic, Cell 2- Prokaryotic
Explanation:
In the given case, Cell 1 is eukaryotic and Cell 2 is prokaryotic.
• All the living organisms comes in the two groups, that is, prokaryotes and eukaryotes.
• The unicellular organisms, which are devoid of membrane-bound compositions, for example the nucleus are the prokaryotes. They are small, simple and measure about 0-1.5 micrometer in diameter.
• The prokaryotic cells are devoid of membrane bound structures like nucleus and membrane bound organelles.
• On the other hand, the organisms, which possess a nucleus and other organelles surrounded by a plasma membrane are known as the eukaryotes.
• The internal structures, that is, the organelles are accountable for different functions, like synthesis of proteins and production of energy.
Thus, in the given question Cell 1 is eukaryotic and Cell 2 is prokaryotic.
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Explain what type of logging would most likely necessitate reforestation afterwards.
Clear-cutting is the even-aged logging method that does the most damage. Other approaches to even-aged management include leaving one or two seed trees for the aim of refilling the area with pine cones.
What are the effect of deforestation on logging?Logging is essentially an action, and deforestation is the outcome of that action. But logging is just one of several factors that contribute to deforestation.
Urbanization, agricultural development, and climate change are all major factors in the devastation of our forests and tropical rainforests.
Another even-aged logging technique involves first removing certain trees and then later removing the remaining trees.
Therefore, Clear-cutting is the even-aged logging method that does the most damage.
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Choose the true statement(s) about mutations. To be marked correct, you'll need to select all true statements, as there may be more than one correct answer.
A. Mutations can provide an evolutionary benefit.
B. Mutation leads to genetic and phenotypic variation within a species.
C. In humans, somatic cell mutations are not passed to offspring.
D. Evolution rates are faster in bacteria than in humans because most mutations in human cells are silent.
Answer
All four options ( A,B,C,D ) are true about mutations.
Explanation:
A- Mutation can provide an evolutionary benefits
As mutation helps in creating DNA sequence ,new allele(variant of gene) for a specific gene , thus mutations is known to be the first step of evolution.
B- Mutation leads to genetic and phenotypic variation within the species.
In mutation, genetic variation (difference between individual/population) takes place as new alleles are created ,random matings ,fertilization and during meiosis , recombination of homologous chromosomes. One of the type of mutation called gene mutation give rise to genetic variations.
Its an exceptional case of phenotypic variations ,as mostly there is no effect of mutation on phenotypic variation. Very few mutations lead to phenotype variation and in case mutation takes place in phenotype variation ,making the organism well suited to the environment, the a rapid change in the characterstics of the individual species is seen.
C- In humans, the somatic cell mutation are not passed in offsprings.
Somatic cells are present in all over the body except in the cells that give rise to gametes( ie. egg and sperm cells) and produces offsprings . Thus somatic cells are absent in gametic cells ,therefore mutation cannot be passed to human's offsprings or children.
D- Evolution rates are faster in bacteria than in humans because most mutations in human cells are silent.
Due to their fast growth ,bacteria evolve quickly and share genes with each other and even between the species ,also the mutation that are helpful spread faster in bacteria.
In humans, the silent mutation in human cells cause many genetic disorders like Laron dwarfism. About 99.8% genes are silent mutation.
How can twins be identical?
Answer:C
Answer:
Identical twins are also known as monozygotic twins. They result from the fertilization of a single egg that splits in two. Identical twins share all of their genes and are always of the same sex. In contrast, fraternal, or dizygotic, twins result from the fertilization of two separate eggs during the same pregnancy.
Explanation:
Hope that helps!
which trophic level has tge least number of organisms
Answer:
tertiary consumers
The trophic level that has the least biomass is usually the tertiary consumers.
whitch is a term for decomposer
In a dihybrid cross between two pea plants, one parent is green pod-purple flower (GgPp). The other parent’s genotype is unknown. The phenotype f ratio of their offspring is (1 Green Pod-Purple Flower : 1 Yellow Pod-Purple Flower). What is the genotype of the unknown parent?
The unknown parent's genotype in the dihybrid cross is likely GgPp. This genotype would result in a 1:1 phenotypic ratio of green pod-purple flower to yellow pod-purple flower offspring.
In a dihybrid cross, we consider two independent traits. In this case, the traits are pod color (green or yellow) and flower color (purple). The known parent's genotype is GgPp, where G represents the dominant allele for green pod color, g represents the recessive allele for yellow pod color, P represents the dominant allele for purple flower color, and p represents the recessive allele for non-purple (white) flower color.
Since the phenotypic ratio of the offspring is 1 green pod-purple flower : 1 yellow pod-purple flower, we can infer the possible genotypes of the unknown parent. The observed phenotypic ratio suggests that both parents contribute equally to the offspring's traits. Therefore, the unknown parent likely carries the same genotype, GgPp.When the unknown parent's genotype is GgPp, it means that it can produce two types of gametes: GP and gP. The known parent, GgPp, can also produce two types of gametes: GP and gP. The cross between these parents can result in four possible genotypes for the offspring: GGPp, GgPp, Ggpp, and ggPp. However, only two of these genotypes correspond to the observed phenotypic ratio: GgPp (green pod-purple flower) and ggPp (yellow pod-purple flower).Therefore, the genotype of the unknown parent is likely GgPp, which produces the desired 1:1 phenotypic ratio of green pod-purple flower to yellow pod-purple flower in the offspring.
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What are the source of air pollution and how this pollution affects the turan heath?
Select the correct answer from each drop down menu.
The force of gravity between two object depends on ___ and ___
Blank1:
A.Mass
B.Momentum
C.velocity
Blank2:
A.Color
B.Height
C.Distance
Answer:
Try mass and distance
Explanation:
presentation on hiv/aids
please help i am about to fail this class off i don’t get an A
Answer:
Same for spanish here i'll help u of u help me
Explanation:
Answer:
Mitosis
Explanation:
Meiosis is the type of cell division that creates egg and sperm cells. Mitosis is a fundamental process for life. During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells.
Which are ways of showing probability? Select 4 options. 50% 557 1 × 104 25% 3/4 7/8
Answer:
Option: A and D are the correct answer.
A. 50% and D. 25%
Explanation:
We know that the probability of an event is the chance of occurring of an event.
The probability of an event always lie between 0 and 1.
It is equal to zero if the event will never occur and is equal to 1 if the event is certain to occur.
Also, the probability could be in ratio or it could be in percentage and the percent may be between 0%-100%
Hence, in the given options:
B) 557 is incorrect as the probability is greater than 1.
c) 1×104=104 is incorrect since the probability is greater than 1
Hence, the correct options are:
A. 50%
and D. 25%
Answer:
1,3,5,6
Explanation:
Which government agency monitors the cleanliness of food and ensures that no food-borne illnesses arise?
O Food and Drug Administration (FDA)
United States Department of Agriculture (USDA)
O Environmental Protection Agency (EPA)
O Bureau of Land Management (BLM)
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Answer:
Food and Drug Administation (FDA)
Explanation:
I read the lesson. (Its not hard)
Answer:
.∵∴yeah, i agree with them. Thats the only one that fits.∵∴
Explanation:
Technology can have good and bad effects. What is a bad effect of spraying
pesticides on crops with the use of airplanes?
A. It increases food production
B: it is sometimes sprayed too far from the crops
C. It is decreases the cost of spraying pesticides
D. It lowers the cost of food
Answer: B
Explanation: The others are all good effects of spraying pesticides. B is correct because it is a negative effect of doing so, and I know for a fact that pesticides are very bad for things that they aren’t meant for.
The top of the leaf in this picture has a wax layer called a cuticle how does the cuticule layer help a leaf
Answer:
Cuticle helps to prevent from loss of water vapour. It is also to trap the sunlight.
which macromolecule are broken down to make enzymes and structures?
( REWARD AND BRAINLIEST )
Proteins
Fats
Carbohydrates
Lipids
The random movement of molecules is referred to as_____
A. Brownian movement
B. Concentration gradient
C. Dynamic equilibrium
Why do alleles from linked genes sometimes appear to follow the law of
independent assortment?
A. During meiosis, alleles can switch between homologous
chromosomes through crossing over.
B. During independent assortment, alleles can select which
chromosome they are on.
C. During mitosis, alleles will move up and down a chromosome to
stay together.
D. During segregation, alleles on the X chromosome can be passed
to other chromosomes.
The correct answer is:
A. During meiosis, alleles can switch between homologous chromosomes through crossing over.
Crossing over, which occurs during meiosis, is the process where homologous chromosomes exchange genetic material. This can result in the swapping of alleles between linked genes, leading to new combinations of alleles on the chromosomes. As a result, linked genes may appear to follow the law of independent assortment, where alleles are randomly assorted into gametes.
During meiosis, crossing over allows alleles from linked genes to switch places and appear to follow the law of independent assortment.
Explanation:In genetics, alleles from linked genes sometimes appear to follow the law of independent assortment due to the phenomenon of crossing over during meiosis. Crossing over occurs when homologous chromosomes exchange genetic material, resulting in the recombination of alleles on different chromosomes. This process can lead to the separation of linked alleles and the appearance of independent assortment.
For example, let's consider two genes located close to each other on a chromosome. Initially, the alleles for these genes are linked and inherited together. However, during crossing over, a break can occur between the genes, allowing the alleles to switch places. As a result, the alleles can end up on different chromosomes, leading to independent assortment.
Therefore, option A is the correct answer. Crossing over during meiosis allows for the exchange of alleles between homologous chromosomes and breaks the link between genes, resulting in the appearance of independent assortment.
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Several temperature-sensitive mutant strains of E. coli display the following characteristics.
Mutant (a): Newly synthesized DNA contains many mismatched base pairs.
Mutant (b): Okazaki fragments accumulate, and DNA synthesis is never completed.
Mutant (c): No initiation occurs.
Mutant (d): Synthesis is very slow.
Mutant (e): Supercoiled strands remain after replication, which is never completed.
What enzyme or function is being affected in Mutant (a), causing many mismatched base pairs?
a. No DNA repair
b. No Primase activity
c. No DNA gyrase activity
d. Only DNA polymerase I activity
e. No DNA ligase activity
The enzyme DNA polymerase I is being affected in mutant (a), causing many mismatched base pairs. Thus, the correct option is C.
What is the role of DNA polymerase I?DNA polymerase I (pol I) processes RNA primers during the lagging strand synthesis and also fills small gaps during the DNA repair reactions. However, it is still unclear how DNA polymerase I and polymerase III work together during the process of replication and repair or how the extensive polymerase I processing of Okazaki fragments is in vivo.
In bacteria, all the three DNA polymerases that is I, II and III have the ability to proofread the DNA molecule, using 3'→5' exonuclease activity in the cell. When an incorrect base pair is recognized by this enzyme, DNA polymerase reverses its direction by single base pair of the DNA molecule and excises the mismatched base pair.
Therefore, the correct option is C.
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A virus is best described as a
A. partially living agent that causes disease
B. nucleic acid covered by a protein coat
C. living organism that attacks living cells
D. piece of DNA that transforms a bacterium
Answer:
think it is b
Explanation:
cause they not alive
Answer:
B
Explanation:
Which skin layer contains the protein melanin?
Question 2 of 10
Which statement best describes a surface wave?
A. It forms when electric and magnetic fields vibrate perpendicularly
to each other.
B. It occurs at the boundary of two different mediums, such as air
and water
C. It forms when matter vibrates in a direction that is perpendicular
to the direction of the motion of the wave.
D. It forms when matter vibrates in a direction that is parallel to the
direction of the motion of the wave.
SUBMIT
Answer:
The answer B.
Explanation:
I took AP EX quiz.
The statement best describes a surface wave is it occurs at the boundary of two different mediums, such as air and water. The correct option is B.
What is the surface wave?Surface waves are the mechanical waves that spread along the boundary between many media. An example of a surface wave is a gravity wave.
Surface waves run along the medium, such as water and air, or the interface between two liquid surface
Thus, the correct option is B. It occurs at the boundary of two different mediums, such as air and water.
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HELP ME WITH 13 AND 14 PLZ
Answer:
Explanation:
13 is products and for 14 i cant see the whole diagram
What is a meter? Give two examples of objects that are meter length!
Please hurry way over due and I’m confused
Answer:
A meter is a metric unit of length used worldwide by scientists to measure lengths and distances between objects.
1. What is identity? What does identity mean to you?
Answer:
it means proof of your a specific person
Explanation:
yes
Answer: Identity is not just how other know who you are, but it is what you are on the inside, like you're personality and memories. Identity encompasses the memories, experiences, relationships, and values that create one's sense of self. This amalgamation creates a steady sense of who one is over time, even as new facets are developed and incorporated into one's identity.
Explanation:
how can I define Anatomy
Answer:
What is anatomy?
Anatomy, a field in the biological sciences concerned with the identification and description of the body structures of living things. Gross anatomy involves the study of major body structures by dissection and observation and in its narrowest sense is concerned only with the human body.
or
The branch of science concerned with the bodily structure of humans, animals, and other living organisms, especially as revealed by dissection and the separation of parts.
Example of an anatomy
The study of the structure of the human leg is an example of a study in the field of anatomy. Animal anatomy is also called zoomy or zootomy; vegetable anatomy, phytotomy; and human anatomy, anthropotomy.
Two major types of anatomy
1) Gross (macroscopic) anatomy is the study of anatomical structures that can be seen by the naked eye, such as the external and internal bodily organs.
2) Microscopic anatomy is the study of tiny anatomical structures such as tissues and cells.
“Based on genes that have been activated, a cell breaks down important cell parts, essentially causing death.” This statement is a description of what process
A. Determination
B. Apoptosis
C. Homeostasis
Answer:
Apoptosis, is an orderly process in which the cell's contents break down and are packaged into small packets of membrane for “garbage collection” by immune cells.
help please!!! due in an hour!
Answer:
a microscope
Explanation:
u cant use the other instruments to find out
Answer: A microscope
Explanation: The answer is c
What must be present in order for natural selection to occur in a population?
a
Variation
b
Adaptation
c
Ability to choose traits
d
Unlimited resources among species
PLEASE HURRY
Answer:
adaptation
Explanation:
Which of the following are correct when comparing aerobic respiration and anaerobic respiration
Answer:
where is the following?
Explanation:
QUESTION:
Which of the following accurately compares aerobic and anaerobic respiration?
Answer: CORRECT (SELECTED)
Aerobic respiration requires oxygen, and anaerobic respiration does not.
Explanation:
Aerobic respiration occurs in the presence of oxygen. Anaerobic respiration does not require oxygen to proceed.
