Answer:
B
Explanation:
Edge 2020-2021
Coin tosses can demonstrate the effects of genetic drift. Imagine that heads and tails are two alleles in a population. Consider each coin toss to represent a member of the population. Write down the statements that describes the effect.
Answer:
Smaller populations have a greater chance of having one allele expressed disproportionately.
Explanation:
Genetic drift is defined as the a change in how frequently a gene allele occurs in a given population as a result of random sampling.
This random sampling is similar to having a coin toss that gives heads or tails.
Genetic drift has the tendency of making smaller populations have a greater chance of having one allele expressed disproportionately.
This is because when individuals in a small population mate there is a greater probability that an evolution will have more far reaching effects.
In a large population the effect will be less pronounced.
Which statement best describes the role of the nucleus in a cell?
The gate at a factory keeps out unwanted cars.
The elevator at a factory moves materials around the building.
The boss at a factory gives out orders and directions.
The boxes at a factory are used to ship materials to customers.
O
Answer:
The boss at a factory gives out orders and directions.
Explanation:
The nucleus is an organelle that is enclosed by nuclear membrane and carry genetic material in eukaryotic cells.
The role of nucleus is to monitor and control the functioning of different activities such as growth and metabolism of the cell and also transfers the hereditary information. Likewise boss of a factory gives out orders and directions to regulate the factory properly.
Hence, the correct option is "The boss at a factory gives out orders and directions."
I need These last answers
Answer:
67. Obligate anaerobes
68. Aerotolerant anaerobes
69. pH
70 media nutrient density
71. agar concentration
72. extremophiles
Explanation:
Anaerobes are microorganisms which do not require oxygen for their metabolic activities. The types of anaerobes based on metabolism are: obligate anaerobes; facultative anaerobes ; and aerotolerant anaerobes.
Some bacteria are anaerobes.
67. Obligate anaerobes do not require oxygen at all for their metabolism. They die in the presence of oxygen.
68. Aerotolerant anaerobes do not require oxygen as well but can also tolerate oxygen. they are unaffected by the presence or absence of oxygen
69. The pH of the medium affects the growth of bacteria. When pH becomes too low or too high, bacteria colonies begin to die.
70. when the nutrient concentration is high, growth rate of bacteria colony increases, but when it is low, bacteria colony growth decreases.
71. agar concentration limits the growth of bacteria colony. When the agar is very concentrated, that is the medium is hard, the bacteria colony is limited in their ability to move and vice versa.
72. Extremophiles is the name given to archaea that thrive in extreme conditions of temperature and pH. For example, the archaeal Methanopyrus kandleri strain 116 grows at 122 °C while the genus Picrophilus e.g., Picrophilus torridus has the ability to grow at a pH of 0.06.
Question 26 (5 points)
Which resources are abundant in the Andean and midlatitude countries?
Choose all answers that are correct.
copper
natural gas
diamonds
petroleum
Answer:
Copper,natural gas, petroleum
Explanation:
Copper and petroleum are found in South America. Most of the mines in the world are found in South America and they generates income to the Aldeans countries.
Also, petroleum reserves are found South America and they are very important, but not as as much as mineral reserves. Venezuela is the country that has the largest oil reserves, other countries like Peru or Ecuador have important reserves. natural gas is very common and present in the region, and it is also an important resource.
prepare a question aire to know about interdependence between the biotic and abiotic component
Answer: The biotic components of the environment are the living which beings that interact with the abiotic component of the environment. Abiotic components are non-living like air, water, soil, atmosphere, and others. The biotic components require abiotic components for their survival and the abiotic components get recycled due to the utilization by the living beings.
Explanation:
Questionnaire that can be related with the interdependence of the biotic and abiotic component:
1. How abiotic components are related to biotic components?
2. How abiotic components affect the functioning and survival of the biotic components?
3. What will be the impact on biotic components if all the abiotic factors are removed from their surrounding environment?
4. How water cycle gets disturbed due to deforestation?
5. How carbon cycle gets affected by the deforestation and pollution increases in the region of deforestation?
Trees contribute ____ in the city and countryside. Imagine a land with plenty of trees, grasses and flowers of different colors, sizes aand shapes.
a. Beauty
b. Freshness
c. Coolness
d. Stability
Answer:
beauty and freshness both
Why are urine samples kept in a refrigerator before testing?
Answer:
Urine refrigeration preservation maintains the sample in the ACS chemical analysis, cellularity and bacteriuria
Explanation:
Tests with high diagnosis and prognostic importance in clinical practice include urinary irregular constituents and sediment (ACS). If it is not possible to analyze ACS within two hours of processing, the sample must be retained to prevent pre-analytical interferences. Cooling is due to its economic productivity the most commonly used technique. In comparison, relative to chemical preservation, it poses fewer discomforts.
Please read the following scenario to answer the following question. While working with cultured mouse cells, a researcher unknowingly treated the cells with a mutagen that causes the deletion or insertion of individual nucleotides in DNA. Subsequently, the researcher isolated and cultured a single cell from this group and noticed that the progeny of this cell were not producing a certain protein, and that this affected their survival. The mutation would be most harmful to the cells if it resulted in ________
Answer:
deletion or insertion of nucleotide from or in any coding sequence of the DNA
Explanation:
The mutation would be most harmful to the cells if it resulted in the deletion or insertion of nucleotide from or in any coding sequence of the DNA.
Deletion or insertion of a nucleotide from/into the coding sequence of DNA results in a frameshift mutation away from the original protein. Deletion/insertion of a nucleotide from/to the coding sequence of a DNA can cause a totally different protein to be synthesized from such DNA or, worse still, results in a nonfunctional protein. Both results could be grossly harmful to the cells.
Search online to find at least two articles that have opposite opinions on the repeated breeding of pedigree dogs. Does one article seem more scientifically credible than the other? Explain your answer.
Answer and Explanation:
In current years the subject of inherited disorders in pedigree dogs has been extensively discussed. This article discussed the consequences related to repeat breeding of pedigree dogs. In the last few years several pedigree breeds have been generated which depend on the selection of particular behavioral and physical features. The development of pedigree dog breeds can be both a curse and a blessing. The desired characteristics are severely taken, while undesired characteristics can be unintentionally secure within the breed. The repeated breeding of purebred dogs lead the loss of genetic diversity. The loss of genetic diversity can be attributed to two major actions; the first one happening in domestication and the second arising from the development of breed. Where the repeated use of line breeding, popular sires, promotion of breed barrier rule and breeding for particular phenotypic traits contributed to loss of genetic variation. Widespread use of a popular sires leads to overrepresentation of that dog’s genome in breed. Overrepresentation of a popular sires genome increase the risk of monogenetic inherited disorders. According to the other article inbreeding causes severe birth abnormalities and defects such as epilepsy, and heart diseases that could make the lives of animals miserable. These problems start in the 19th century, when dog fanciers activated to set down desired physical characteristics. The scientific evidence shows that ninety percent dogs are said to be healthy. According to the both articles repeated breeding of pedigree dogs cause many genetic disorders.
Answer:
A veterinarian wrote an article stating his disapproval of some of the tactics used to breed pedigree dogs. He stated that pedigree dogs can be healthy, but because of inbreeding, they’re more likely to have health problems than other dogs. The author supported his statement with scientific studies.
A breeder with 20 years of experience wrote an article that was pro-breeding. He talked about his own success and shared his opinions on proper breeding techniques. Because the veterinarian used scientific facts to support his reasoning, his article seemed more scientifically credible to me.
Explanation:
In hamsters, there is a dominant allele (S) for smooth fur and a recessive allele (s) for spiky fur. A unique characteristic of these alleles is that the heterozygote (Ss) has its own phenotype - rough fur. In this way, we can determind the number of heterozygotes in the population. In a population of 1000 hamsters, 390 have smooth fur (SS), 470 have rough fur (Ss) and 140 have spiky fur (ss).
What are the allele frequencies in this population?
Frequency of S =
Frequency of s =
In the next generation of 1000 hamsters, what are the expected genotype frequencies?
Frequency (SS) =
Frequency (Ss) =
Frequency (ss) =
What are the expected number of each genotype in the next 1000 hamsters?
Number of SS Number of Ss Number of ss Have the allele frequencies changed?
Is the population in Hardy-Weinberg equilibrium?
have the allele sequencie: nanged is the populati Weinberg equitoThe expected genotype frequency of Ss (2pq) in the next generation is expected to be:
a. 0.469
b. 0.390
c. 0.938
d. 469
The expected number of smooth fur hamsters (SS) in the next generation of 1000 hamsters is:
Is the population of hamsters in Hardy-Weinberg equilibrium?
Answer:
What are the allele frequencies in this population?
Frequency of S = 0.625 Frequency of s = 0.375In the next generation of 1000 hamsters, what are the expected genotype frequencies?
Frequency (SS) = 0.39 Frequency (Ss) = 0.47 Frequency (ss) = 0.14What are the expected number of each genotype in the next 1000 hamsters?
Individuals SS = 390Individuals Ss = 469Individuals ss = 140Have the allele frequencies changed? No, they are the same
Is the population in Hardy-Weinberg equilibrium? Yes, it is.
The expected genotype frequency of Ss (2pq) in the next generation is expected to be: 0.469 (option a)
The expected number of smooth fur hamsters (SS) in the next generation of 1000 hamsters is: 390
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files.
When Nepal clear-cut its mountainous forests, it created environmental disasters in other countries. Which of the following is not one of the created disasters?
A)
destabilized soil leading to landslides
B)
increased sediment load in rivers and streams
C)
flooding conditions downstream
D)
local farmers suffering from increased crop pests
Answer:
D
Explanation:
Got it right
Which statements describe functions of antibodies? Select two options.
Answer:
This question lacks options, options are:
A.They maintain the cell’s shape.
B.They regulate cell processes.
C.They protect the body from infectious agents.
D.They signal the immune system to destroy pathogens.
E.They speed up biochemical reactions.
F.They send electrical signals.
The correct answers are C and D.
Explanation:
B cells and T cells use different biological weapons to attack the pathogen. The first secrete proteins called antibodies, which are distributed via the blood or the exposed surfaces to the environment, such as mucous. Antibodies are glycoproteins that circulate in the bloodstream looking for antigens that cause some type of damage to the body. Antibodies recognize and neutralize pathogens in a highly efficient way. Once the antibodies are produced, they remain circulating in the bloodstream for several months, which generates immunity for a long period of time to a certain antigen, in other words, they are capable of recognizing other molecules (antigens) in a very specific way and forming stable complexes with them (immune complexes). Its appearance in plasma is part of the adaptive immune response, in what is known as a specific humoral response, constituting a very effective defense against pathogens.
How are cellular respiration and photosynthesis mutually dependent
Answer:
Photosynthesis makes the glucose that is used in cellular respiration to make ATP. ... While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. It is the released oxygen that is used by us and most other organisms for cellular respiration.
Explanation:
Which of the following is the term for malignancy of the retina in early childhood and usually requires removal of the eye?
Helppp meeeeeeee pls!!!!
Answer:
ture
Explanation:
Answer:
that is true
Explanation:
Which organelle part of the cell would say this if it could speak? Nobody messes with me! I make all the decisions in
this cell.
1)Cell membrane
2)Vacuole
3)Mitochondria
4)Cytoplasm
5)Nucleus
Answer:
nucleas
Explanation:
they control all the cells
How would the world be different if ice were more dense than water?
When water is being transported from the roots to the leaves of a plant or tree, water vapor eventually escapes through air spaces in the plant or tree. More water travels up to replace the lost water due, in part, to the ________________ of water.
Answer:
What the actual truck
Explanation:
How does a plant get the food it needs in order to grow?
Answer: Plants make food in their leaves. The leaves contain a pigment called chlorophyll, which colors the leaves green. Chlorophyll can make food the plant can use from carbon dioxide, water, nutrients, and energy from sunlight. This process is called photosynthesis.
Explanation: do you know zayn malik
If a carrier female and an affected male have a offspring, what is the chance that they will have a carrier offspring
A 75%
B 50%
C 25%
D 25%
Answer: 75%
Explanation: there is a higher risk because there is a carrier as well as an affected. Lets just put it this way, they are either going to have the disease or carry the disease.
Place the following events in
the cell cycle in the proper
order:
a. Anaphase
b. Cytokinesis
C. G2
d. Telophase
e. G1
f. Prophase
8. S
h. Metaphase
The cell cycle in the correct order is G1, S, G2, Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis.
What is the cell cycle?Prophase, metaphase, anaphase, and telophase are the four phases that a cell goes through. To form chromosomes, chromatin condenses (sister chromatids joined at the centromere).
In prophase, the chromosomes get shorter and thicker, in the center of the cell, during the metaphase, the chromosomes align. Chromatids separate during the anaphase process and travel to the opposing poles.
Telophase: Two nuclei are produced when nuclear envelopes have reformed around each chromosomal group.
Therefore, the cell spends the majority of its time in interphase, which is also when it grows, duplicates its chromosomes, and gets ready to divide.
Learn more about cells, here:
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pls help. its for bio. giving 15 points
Answer:
chromosomal rearrangement
What has to happen to atmospheric
nitrogen in order for it to become
available to plants?
Answer:
To be used by plants, the N2 must be transformed through a process called nitrogen fixation. Fixation converts nitrogen in the atmosphere into forms that plants can absorb through their root systems.
Explanation:
Which of the following is not a reason why there has there been so much attention given to saving tropical rainforests?
A)
great species diversity and habitat
B)
livelihood for human inhabitants
C)
vacation possibilities
D)
the possibility of finding new drugs
Answer:
C.) vacation possibilities
Explanation:
got it right on edge 2021
Unstained cells have very little contrast. What single adjustment could you make to your microscope that would make cells easier to see at the same time while reducing the evaporation of your sample?
Answer and Explanation:
Microscope objects have thermal profiles. These profiles differ as a purpose of their physical parameters. Most objects are sold and designed for the resolution of fixed cell microscopy.
There is little indication that the temperature cycle affects the strain characteristics. A large box can be constructed around the microscope and heated with hot air.
The heating system's cycling causes the specimen to drift out of focus and can also change the coverslip position.
The microscope can be equilibrated to a single temperature to eliminate the movement resulting from the thermal expansion of the microscope's components.
Air currents connecting the specimen chamber should also be reduced—tight control of temperature for the entire laboratory and microscope. Any change in the temperature can lead to unwanted movement in the microscope. Heating ducts often produce localized temperature changes.
PLZ HELP
Recall from the video why homeostasis is so important. What could happen if the interactions between the parts of the body did not operate properly to maintain homeostasis?
Answer:
the most frequent thing so that homeostasis does not occur is the imbalance of some of the systems, such as the respiratory or endocrine, among others ... and also the state of shock of the organism.
Explanation:
The states of shock are as follows:
hypovolemic or hypervolemic shock, hypo or hyperglycemic shock, anaphylactic shock, hypotensive or hypertensive shick.
These shocks are very difficult to reverse, they quickly deregulate homeostasis and also require a rapid medical response.
Manufacturers could reduce waste and conserve resources by making products that use less
are difficult to repair
use more materials
are more durable
are disposable
Answer:
are disposable.
Explanation:
Manufacturers could reduce waste and conserve resources by making products that are disposable.
This ultimately implies that, manufacturers of finished products that are being used by the consumers should endeavor to make them easily disposable without any adverse effect on the environment.
Describe why the amount of light available to the Chlorella culture might affect the growth dynamics of the alga.
Answer:
See the answer below
Explanation:
The amount of light available to Chlorella culture might affect the growth dynamics of the alga because the light is an important factor necessary for the synthesis of carbohydrates and other important molecules in the body of the organism.
The process of synthesizing carbohydrates is termed photosynthesis and during this process, the energy of light is used to excite the photosystem of the chlorophyll of the organism, leading to the release of electrons whose energy is used to synthesize an energy molecule that is utilized in the latter part of the photosynthetic process. The entire process of photosynthesis can be summarised as an equation below:
[tex]6CO_2 + 6H_2O + light --> C_6H_1_2O_6 + 6O_2[/tex]
The manufactured carbohydrates act as food for the organism and are broken down during respiration to release energy necessary to drive metabolic processes that bring about growth and development.
Hence, the amount of light is an important factor that might affect the growth dynamics of all green plants, including the Chlorella.
The amount of light available to the Chlorella culture affect the growth dynamics of the alga because of photosynthesis.
Chlorella is an alga means it is an autotrophic organism that produce food by using the sunlight.
In the absence of light, Chlorella will not be able to survive in the culture.In presence of low light, Chlorella will grow slowly due to low production of food.In presence high intensity light, Chlorella will grow faster.Therefore, the amount of light available to the Chlorella culture affect the growth dynamics of the alga because of photosynthesis.
To know more about photosynthesis,
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A scientist wants to monitor the amount of acid
precipitation falling into a watershed.
Which tool would be the best Tor the scientist to use?
O A. pH meter
O B. Dissolved oxygen sensor
O C. Satellite images
O D. Bioindicators
Answer:
A. pH meter
Explanation:
This is because a pH meter measures the acidity of water.
Answer:pH meter
Explanation:
Why might it benefit your compost to add earthworms to the mix?
Answer:
earthworms benefit the soil
Explanation:
activity 2
Label the parts of the female reproductive system
Answer:
See explanation
Explanation:
The female reproductive system is composed of internal and external sex organs. These organs are immature at birth but develops during puberty and enable the production of gametes or sex cells, and are also equipped with structures to carry a foetus during pregnancy.
The exterior of the female reproductive organ consists of the vagina and its associated structures. The vagina now leads to other internal structures in the female reproductive system such as uterus, fallopian tubes, cervix, and ovary.
An image of the full anatomy of the female reproductive system is shown in the image attached to this answer.
Image credit: topperlearning