Answer:
The correct answer is - It's a sampling of people with a wide variety of diets preventing analysis of risk groups.
Explanation:
The correct answer among the given option would be that people with more diverse diet variety would be preventing the analyzing the risk groups. It is known that the human microbiome project believes that every individual experiences a specific and unique effect of the microbiome.
Even in the case of two distinct organisms have the same microbiota will experience different effect and show different characteristics to one another due to varieties and difference in their diet.
The lac operon controls the transcription of a group of genes involved in metabolizing lactose in E. coli. A group of scientists tested how to activate the lac operon. In four different mediums, they varied whether glucose or lactose was present in the medium, as indicated by a or -.The scientist discovered that the lac operon is inducible, repressed by glucose and induced by allolactose. Which medium has the right conditions to metabolize lactose
Answer:
The correct answer would be - medium with lactose present and glucose absent.
Explanation:
There are genes present in lac operon that takes part in the lactose metabolism. These genes expressed only if a medium has lactose in absence of glucose.
In the absence of glucose and lactose is present, due to inducer the lac repressor is removed from the operator. This leads to the binding of CAMP to DNA as the CAMP levels are high. It helps in high transcription levels b binding RNA polymerase to promotor.
which lymphoid organs atrophies with age???????
a)Peyer patches
b)Thymus
c)Bone marrow
d)Spleen
answer plz (╯︵╰,)
Can someone pplease help me ASAP please
Answer:
Phosphate Group
Explanation:
Which of the following do plants use for energy?
Answer:
phhotosyntesis
Explanation:
Describe what happens when cells divide uncontrollably?
Select the correct answer.
Who do we consider to be the founder of genetics?
Answer:
C: Gregor Mandel
5 Which word should replace the question mark in the diagram? ? Water droplet Reflection А Refraction B Reflection C Light energy D Rainbow
Answer:
percipitation
Explanation:
I took this class already
You are studying the bacteria in the water of a nearby pond. From a 100 mL sample, you use a 0.5 mL subsample to inoculate a plastic dish filled with a semi solid nutrient medium that fosters growth of coliform bacteria. After an appropriate incubation period, you count 100 bacterial colonies growing on the surface of the medium. What conclusion can you make about the coliform bacteria in the pond water
Answer:
There are 20,000 colony forming units of coliform per 100 mL of the pond water.
Explanation:
0.5 mL of the 100 mL sample was inoculated.
There were 100 colonies in the 0.5 mL of the sample.
Hence, the number of colonies that would be in the 100 mL can be calculated as:
100 colonies = 0.5 mL
x = 100 mL
x = 100 x 100/0.5
= 20,000 colonies
Hence, the conclusion that can be made is that there were 20,000 CFU (colony forming units) of coliform bacteria in a 100 mL sample of the pond water.
Some cells live for years, while others live for only a few days. Why do some cells get replaced faster than others?
Answer:
Some cells don't divide and last you a life time such as many of those in the central nervous system other cells such as stems called cell populations have their telemeres repeatedly extended by the enzyme telomerase other cells are never replaced and live as long as we do .
I hope this answer might help u
what are some facts of the Marine ecosystem!
Answer:
The Marine Ecosystem is the Largest Ecosystem on Earth
The Marine Ecosystem has the Greatest Biodiversity on Earth
Phytoplankton in the Oceans Provide 50% to 85% of the Oxygen on Earth
Explanation:
There's 3 facts lol
does anyone know how to do this?
Dr. Nachman and his colleagues collected rock pocket mice across 35 kilometers of the Arizona Sonoran Desert, which included both dark, rocky lava outcrops and light, rocky, granite areas. They recorded substrate color, and coat-color frequencies for each location. Each site was separated from any of the others by at least eight kilometers. The researchers trapped a total of 275 mice. Their data are summarized below (numbers have been slightly modified for the purposes of this worksheet).
Field Data Summary
Collecting Site Substrate Color Number of Mice Phenotype Light Dark
1 Dark 22 3 19
2 Light 80 74 6
3 Light 22 19 3
4 Dark 28 3 25
5 Light 58 25 33
6 Dark 65 9 56
1. Calculate the overall frequencies of light-colored mice and dark-colored mice caught on light-colored substrates. [to 3 decimal places]
2. Calculate the overall frequencies of light-colored mice and dark-colored mice caught on dark-colored substrates. (to 3 decimal places)
3. Using the Hardy-Weinberg equation and data from the table above, determine the frequency of the three genotypes on the light, rocky, granite substrate. For genotype frequencies use three decimal places and for calculations using the allele frequencies, you must round the allele frequencies to two decimal places.
4. Using the Hardy-Weinberg equation and data from the table above, determine the frequency of the three genotypes on the dark, rocky lava substrate. (to 3 decimals). For genotype frequencies use three decimal places and for calculations using the allele frequencies, you must round the allele frequencies to two decimal places.
5. Which fur color seems to have the greatest overall selective advantage? Use data collected from both dark-colored and light- colored substrates to support your answer.
6.What environmental change gave a selective advantage for one coat color over another?
7. In a separate study, 76 rock pocket mice were collected from four different, widely separated areas of dark lava rock. One collecting site was in Arizona. The other three were in New Mexico. Dr. Nachman and colleagues observed no significant differences in the color of the rocks in the four locations sampled. However, the dark-colored mice from the three New Mexico locations were slightly darker than the dark-colored mice from the Arizona population. The entire Mc1r gene was sequenced in all 76 of the mice collected. The mutations responsible for the dark fur color in the Arizona mice were absent from the three different populations of New Mexico mice. No Mc1r mutations were associated with dark fur color in the New Mexico populations. These findings suggest that adaptive dark coloration has occurred at least twice in the rock pocket mouse and that these similar phenotypic changes have different genetic bases. How does this study support the concept that natural selection is not random?
8. To determine if the rock pocket mouse population is evolving, explain why it is necessary to collect fur color frequency data over a period of many years.
Answer:
1)
frequencies of light-colored mice ≅ 0.74 frequencies of dark-colored mice ≅ 0.262)
frequencies of light-colored mice ≅ 0.13 frequencies of dark-colored mice ≅ 0.873)
p² ≅ 0.02q² ≅ 0.742pq ≅ 0.244)
q² = 0.13 p² = 0.4 2pq = 0.465) The dark-colored fur seems to have the greatest overall selective advantage
6) Dark lava changed the color of the substrate, from light to dark.
7) Because to produce dark color, animals from the different regions suffered different mutations that drove them to have almost the same dark fur color.
8) To see if the mice population is evolving. If it is, there will be a change in the allelic and genotypic frequencies over the years. If it is not evolving, the frequencies will keep equal through the years.
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
Plz answer this test ASAP
The cardiovascular system is composed of two circulatory paths: pulmonary circulation and systemic circulation.
Pulmonary circulation transports deoxygenated blood from the right side of the heart to the
A. left side of the heart where it is pumped to the lungs for oxygenation
B. lungs where blood picks up oxygen and returns to the left side of the heart
C. lungs where blood picks up oxygen and returns to the right side of the heart
D. lungs where the blood picks up oxygen and transports it to the tissues of the body
Answer:
B. lungs where blood picks up oxygen and returns to the left side of the heart.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
1. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
2. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
The cardiovascular system comprises of two circulatory paths:
I. Pulmonary circulation.
II. Systemic circulation.
Pulmonary circulation transports deoxygenated blood from the right side of the heart to the lungs where blood picks up oxygen and returns to the left side of the heart.
The pulmonary circulation loop is mainly supported (powered) by the right atrium and right ventricle.
Additionally, the right atrioventricular valve (AV) also referred to as the tricuspid valve is located on the right dorsal side of the human heart. The right atrioventricular valve (AV) comprises of three (3) leaflets (flaps) which opens and closes in order to allow for the flow of blood from the right atrium of the human heart to the right ventricle. Also, the right atrioventricular valve is saddled with the responsibility of preventing blood from flowing backward in the mammalian heart.
What was the most important gas contributed by stromatolites?
a. carbon dioxide
b. nitrogen
c. ammonia
d. oxygen
Oxygen was the most important gas contributed by stromatolites. Thus, the correct option is D.
What are Stromatolites?Stromatolites may be defined as rock or microbial reefs that are formed by cyanobacteria (blue-green algae).
Stromatolites are responsible for the oxygenation of the atmosphere. Blue-green algae fed off carbon dioxide and convert it into the marine sediments known as Stromatolites.
Therefore, the correct option for this question is D.
To learn more about Stromatolites, refer to the link:
https://brainly.com/question/1001123
#SPJ2
Answer:
I hope this helps.
Explanation:
Analyzing the following tree, prove the relationship between ray-finned fish and crocodiles using the characteristics given below. Include at least three (3) characteristics that the organisms DO NOT have in common and one characteristic that they DO have in common. Your paragraph should be at least four (4) sentences. Remember to answer in COMPLETE sentences and use proper grammar.
Answer:
The Ray- Finned Fish has a bony skeleton just like crocodiles. Crocodiles evolved more and adapted to their environment. Along the way Crocodiles grew to have four limbs, were born from an amniotic egg, and then their eggs also have shells, unlike the Ray-finned fish. Therefore the three characteristics they do NOT have in common are: Four Limbs, Amniotic Egg, and Eggs with Shells. The one trait they do have in common is Bony Skeletons. They also both have vertebrae.
Which statement is true based on the data in the table?
A. The United States uses more land to grow crops than to maintain forests
B. The United States uses more land for parks and wildlife than for forests
C. The United States uses more land for parks and forests than for urban areas.
D. The United States uses more land for urban areas than for grasslands and ranges
Answer:
C. The United States uses more land for parks and forests than for urban areas.
Explanation:
According to the given data, the size of land used for parks and forests in United States is 313 million acres. The land used for urban areas is 61 million acres. This data here presents a comparative detail of the size of land and the purpose it is used for.
The maximum land used by United States is for forest area and grass range. This depicts that more stress is levied on keeping the land green.
Answer:
C.
Explanation:
Person above is right.
Which best describes a method of obtaining energy that may cause changes in
water temperature and harm to fish populations?
A burning coal
B using ethanol in cars
C installing solar panels on a home
D generating electricity in a hydroelectric power plant
Group of answer choices
Answer:
D. generating electricity in a hydroelectric power plant.
Explanation:
Renewable energy is also known as clean energy and it can be defined as a type of energy that are generated through natural sources or technology-based processes that are replenished constantly. Some examples of these natural sources are water (hydropower), wind (wind energy), sun (solar power), geothermal, biomass, waves etc.
Basically, a renewable energy source is sustainable and as such can not be exhausted.
Generating electricity in a hydroelectric power plant best describes a method of obtaining energy which may cause changes in water temperature and harm to fish populations. This is due to the operation of powerful electric steam turbines operating at high voltage.
Explain how meiosis results in UNIQUE cells.
Meiosis is a reduction division in which the number of chromosomes in the parent cells is halved to the daughter cells.
Meiosis is the process such as:
Meiosis occurs in the reproductive cells of humans. Meiosis transmits genetic information from parent to offspring. Meiosis is the characteristic feature of sexual reproduction. The male and female gamete fuse to give rise to a newly formed combination of the daughter cells.Meiosis results in the recombination of male and female gametes, which results in the independent assortment of the genes.
Thus, meiosis always results in new variations and creates genetic diversity.
To know more about meiosis, refer to the following link:
https://brainly.com/question/7002092
What is a chromosome and what is its relationship to DNA?
Answer:
hi
Explanation:
Most of the oxygen in the atmosphere is made by algae. Where do most of the algae live?
coastal ocean
deep ocean
ponds
lakes
Most of the oxygen in the atmosphere is made by algae, with coastal oceans housing the majority of algae. Hence the correct option is A.
What is Algae?Algae is defined as a member of a group of primarily aquatic photosynthetic organisms of the Protista kingdom. Algae is described as floating green matter on the surface of a pond, lake, river, still water, moist soil, stones that grow on wet surfaces. Therefore, they can synthesize their own food. They are found in water or in very moist places.
Algae play many important and beneficial roles in freshwater environments producing oxygen and consuming carbon dioxide that act as the base of the aquatic food chain, removing nutrients and pollutants from the water and stabilize sediments. Most of the oxygen in the atmosphere is made by algae, with coastal oceans housing the majority of algae.
Hence the correct option is A.
Learn more about Algae, here:
https://brainly.com/question/4289110
#SPJ6
Examine a world map. What large patterns and structures do you see?
Help plis..............
Answer:
the answer has to be C
hope this helps!
Scientists recently published a paper about an endangered population of Scarlet Bass (species A) in Lake Erie. The authors also published its entire mitochondrial DNA sequence on Genbank, an online system where scientists submit genomic data. Another group of scientists later published an article using molecular data to estimate gene flow among populations of the very abundant Grey Bass species (species B) in Lake Erie, and published mitochondrial data on Genbank as well. After you read the papers you realize that the ranges for species A and a few isolated populations of species B overlap; you look at the sequence data published online from both studies, and you realize they are very similar and differ only by a few nucleotide differences. 8. Do you think these are closely related species, or variants of the same species
Answer:
They are variants
Explanation:
The biological concept of species states that members of the same species can reproduce they have a genetic reservoir in common: many genetic variants.
Genetic variability is the measure of a species organism´s tendency to differentiate. In genetic variability, individuals of the same species are not identical. They are recognizable as members of the same species, but they differ in shape, function, and behavior. There exist variations among individuals of the same species.
Genetic variability originates from mutations, recombinations, and karyotype alterations. It allows or makes possible evolution.
Groups A and B can be considered variations of the same species. They not only overlap but also share most of the genetic sequences with only a few nucleotide differences.
These variations might be the previous step for sympatric speciation.
how could I summerize the nervous system?
what's the function of the lungs
Answer:
correct
Explanation:
Your lungs are part of the respiratory system, a group of organs and tissues that work together to help you breathe. The respiratory system's main job is to move fresh air into your body while removing waste gases.
Which of the following increases the amount of water in the atmosphere
Answer:
Transpiration
Explanation:
This is the process of water evaporating from plants into the atmosphere.
Describing the path of a water molecule through a convection current
Answer:
When we heat a container full of water, the water in the lower part of the container i.e. near the flame gets heated first. Warm water rises up and the cold water rushes below to take its place. This water again gets heated and rises up and the cycle continues.
Darwin and Wallace both observed greater species richness in the tropics than in Europe, but neither of them had a good explanation for why. One of the best-supported modern-day hypotheses to explain this pattern is that mutation rates are higher in the tropics than in temperate latitudes. Why would higher mutation rates lead to greater species richness
Answer:
Mutation shows the species energy relationships, tropics are more rich with energy as compared to the temperate europe.
Explanation:
The rate of species evolution is defined by the type of environment or the natural surroundings it lives in. Mutations Can affect organisms by making changes in their physical characteristics. Such can impact their DNA code and may even lead to death in many. The richness of species in the tropics is due to the more warmer and humid climates. They are suited to the development and germination of certain bacterias and have certain climatic phenomena.Whare does digestion of starch begins?
Answer:
Mouth
Explanation:
The saliva supplies moisture, carbohydrate-digesting enzyme and amylase.
22)
The Master answered, "Never fail to comply."
Fan Ch'ih was driving. The Master told him about the interview, saying, "Meng-sun asked me about being filial. I answered,
"Never fail to comply."
Fan Ch'in asked, What does that mean?
The Master said, When your parents are alive, comply with the rites in serving them; when they die, comply with the rites in
burying them; comply with the rites in sacrificing to them.'
Analects II, 5
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Which principle of Confucianism does this support?
A)
Virtue
B)
Social Order
Mandate of Heaven
D)
Ancestor Veneration
23)
The start of the Korean War in 195
Answer:
D
Explanation: