Answer:
When a front passes over an area, it means a change in the weather. Many fronts cause weather events such as rain, thunderstorms, gusty winds, and tornadoes. At a cold front, there may be dramatic thunderstorms. At a warm front, there may be low stratus clouds.
Answer:
It means that a change in the weather. Front passes can cause thunderstorms, tornadoes, rain, and breezy winds.
Explanation:
You are screening three new pesticides for potential mutagenicity using the Ames test. Two his- strains resulting from either a frameshift or a transition mutation were used and produced the following results (number of revertant colonies):
Strain 1
Transition Mutant Control (no chemical) Transition Mutant + Chemical Transition Mutant + Chemical + Rat Liver Enzymes
Pesticide#1 21 180 19
Pesticide#2 18 19 17
Pesticide#3 25 265 270
Strain 2 Framshift Mutant Control (no chemical) Framshift Mutant + Chemical Framshift Mutant + Chemical + Rat Liver Enzymes
Pesticide#1 5 4 5
Pesticide#2 7 5 93
Pesticide#3 6 9 7
Required:
What type of mutations, if any, do the three pesticides induce?
Answer:
- Pesticide 1: Induces transition mutations. Rat liver enzymes convert it into a nonmutagenic product. Does not induce frameshift mutations.
- Pesticide 2: Does not induce transition mutations. Rat liver enzymes convert it into frameshift mutagen.
- Pesticide 3: Induces transition mutations. Rat liver enzymes don't have ability to convert compounds into mutagens. Does not induce frameshift mutations.
Explanation:
The Ames test is a technique widely used to evaluate the mutagenic potential of a particular chemical compound. The Ames test uses Salmonella typhimurium strains with a defective mutation that makes them unable to synthesize histidine. When the mutation is reversed, then the revertant strains can grow on a medium lacking histidine. A positive test shows that the chemical is mutagenic because its activity is associated with the reversed mutation and thereby the mutant gene regains its function. In humans, as well as in other mammals, many chemicals don't have mutagenic effects themselves but they may become converted into mutagens when are metabolized by the body. For that reason, rat liver enzymes are added to replicate the metabolic effects of the chemical compound being tested. Nowadays, current tests can express recombinant human proteins instead of rat liver enzymes, thereby enabling a better correlation between mutagenic activity and human metabolic processes.
Now use the Frequency slider to increase the frequency to a high value. Compare the motion of the parti
Answer:
Now use the Frequency slider to increase the frequency to a high value. Compare the motion ofthe particles when the frequency is high to the low-frequency ...
Missing: parti | Must include: parti
Explanation:
Answer each question, using it as an opportunity to illustrate the depth of your knowledge in this area.
1. One of the fundamental controls which ecosystems exert over individual species is limits on population size. This is done by a combination of predatory, competitive, parasitic and mutualistic relationships within the ecosystem. Never the less, the human population has increased well beyond what is healthy for those systems. How did we manage to grow beyond these limitations?
2. Natural variations in weather patterns have effects on certain populations. A warm damp spring for example, is ideal for small rodent species and certain insects, who benefit from the lush vegetation produced by this pattern. As a result, their populations swell to high levels. In the end however, this doesn't result in population growth at the higher tropic levels. You don't end up with more predators, just fatter predators. What limits the ability of the higher tropic levels to grow in response to the increased availability of food?
3. An unfortunate series of events finds you stranded on a remote uninhabited south Pacific island, with little chance of being rescued. It is a modest-sized island with adequate resources to support you, if you are careful to minimize your impact on it. You know that inserting yourself into this ecosystem will almost certainly mean the loss of members in some populations, so your goal is to minimize your impact on the overall biodiversity of the system. With this in mind, from which tropic level(s) should you obtain your food?
Answer:
1. Humans are an “invasive species” because human populations have eliminated many ecological relationships, dramatically changing the dynamic of their ecosystems
2. continued loss of energy due to metabolic activities
3. lower trophic levels
Explanation:
1. An invasive species is any organism that is not native to an ecosystem and may negatively alter its new environment. Invasive species don't interact with native species when they are introduced into an ecosystem (for example, invasive species usually don't have any natural predators). Humans are an 'invasive species' that occupy a wide range of habitats and whose presence has caused the extinction of many native plants and animals. Human populations have drastically reduced the biodiversity of different ecosystems by competing with native species for limited resources, and we also have altered their habitats (global human population growth is also due to medicine and farming techniques, reducing hunger and diseases). In this regard, it is important to highlight that the human population can also grow in an ecologically sustainable manner by taking care of the ecosystems we live in.
2. Animals (predators) are consumers, thereby they depend on lower trophic levels for their food supply. The Second Law of Thermodynamics indicates that the continual loss of energy due to metabolic activities at lower trophic levels leads to a decrease in the amount of available energy at higher trophic levels. In consequence, the population size decreases at higher levels due to the amount of energy available from one lower level to the next higher level has to decrease when it is used for metabolic activities (i.e., growth, development, etc).
3. In the food chain, the primary producers are found at the lower trophic level (e.g., plants). Primary producers are followed by consumers (e.g., herbivores), they are followed by secondary consumers (i.e., carnivores that eat herbivores), and so on. When an invasive species at higher trophic levels is introduced into a new ecosystem (in this case, human species), it is imperative to preserve the biodiversity (and consequently also the productivity) at lower trophic levels because they are fundamental for the survival of higher trophic levels (i.e., consumers).
Which property refers to how energy, such as heat and electricity, can travel through a material?
Answer:
Conductivity
Explanation:
The ability of electrical energy to flow through materials is called conduction, so the property is the conductivity property
brown eye color is dominate; blue is recessive.if a brown-eyed man marries a blue-eyed woman and they have a brown eyed boy and a blue eyed girl, what can we conclude about the parents?
Answer: first baby - dads dominant brown colored eyes
second baby - both of moms genes becuase you need two recessive genes to have a recessive trait
Explanation: i hope that makes sense, have a great day!!
Assume that Brown (B) hair is dominant over blond (b) hair and that oval shaped eyes (O) were dominate over round (o) eyes. Complete a Punnett square showing a cross between a mother who was heterozygous for both traits and a father who also was heterozygous for both traits. Based on Mendel’s work what could you predict about this cross? What percent chance do these parents have that the child will be blond with oval shaped eyes? What percent chance do the parents have that the child will have brown hair with oval eyes? What percent chance do the parents have that the child will have blond hair with round eyes?
Answer: 25%
Explanation:
So basically, you draw two Punnett Squares, one for each of the different traits. Since both parents are heterozygous, meaning they have a combination of traits, you would label the four sides of the square B, b, B, and b. Same thing with the eye shape trait. Label the sides O, o, O, and o. Then, you plot it like in the picture I provided. When the B and the B match up, label it BB. When the B and the b match up, label it Bb, etc. Then, since your chances of getting blonde hair (bb) is 1 in 4 (4 combinations total), the percentage of getting blonde hair is 25%. Same thing for getting round eyes, just repeat the process. Now that you have all your squares filled, you can see that your chances of getting both blonde hair and round eyes is 2 in 8, which simplifies to 1 in 4, which is equal to 25%
What happens in a warm front?
A. A warm air mass becomes a cold air mass as it moves.
B. A warm air mass catches up to a moving cold air mass, sliding
over it.
C. A cold air mass comes in under a warm air mass.
D. A warm air mass collides with a stationary cold air mass, and
slides under it.
Answer:
A warm front forms when a warm air mass pushes into a cooler air mass, shown in the image to the right (A). Warm fronts often bring stormy weather as the warm air mass at the surface rises above the cool air mass, making clouds and storms. ... As the front passes over an area, the clouds become lower, and rain is likely
What are the characteristics of kingdom eubacteria?
Prokaryotic
Heterotrophic
Unicellular
Multicellular
Found in extreme Environments
Eukaryotic
Found in common environments
Autotrophic
unicellular
Explanation:
eubacteria is not mutiple in number
What level of organization is formed when many cells come together ?
Answer: A (Tissue)
Explanation:
Cells are the simplest level of organization. Many cells working together form tissue. The cells involved are specialized to cooperate with each other to accomplish one common goal. There are many different types of tissue in both plants and animals. When there are layers of tissue working together, they form an organ.
Hope This Helps!
Answer:
Its tissue
Explanation:
when it comes to the levels of organization cells come first the tissue
How do lungs help cells in the body meet their needs?
A. They produce oxygen for the body.
B. They bring oxygen from air into the body.
O c. They transform oxygen from the body into carbon dioxide.
D. They release oxygen fromod and send it through the body.
Individuals may pass on
traits (characteristics) to their
offspring which they themselves do not
show
true or false
Answer:
True
Explanation:
Two parents with recessive traits (a trait that is not on display) would create offspring with one dominant trait.
3.what colour does the clear alcohol become once the leaf is boiled in it? Explain why?
Answer:
We boil the leaf in alcohol when we are testing it for starch because to remove the green pigment chlorophyll present in it. For the starch test, we need to observe the colour change from brown to blue when iodine is put on the leaf.what is closer to the equator 10 degrees south or 20 degrees north
Answer:
10 degree north
Explanation:
Hope it helps:)
Which statement best describes how some trees respond to decreasing temperatures and shorter days in the fall? A. They drop their leaves and go into dormancy. B. They drop their leaves and increase photosynthesis. C. They grow new leaves and increase photosynthesis. D. They grow new leaves and go into dormancy.
Which would be considered an ecosystem?
A
a colony of bacteria
B
biotic factors in a forest
с
populations of zebras and lions
D
living and nonliving things in a pond
Answer:
A colony of ants is a species, C is only animals and only the biotic factors it is D living and nonliving things in a pond
Explanation:
Directions: Select ALL the correct answers
All living things contain carbon. Which of the following statements are true about carbon atoms?
A single molecule of some compounds can contain thousands of carbon atoms.
Each carbon atom can form single bonds with up to four other carbon atoms,
Each carbon atom can form double bonds with up to two other carbon atoms.
0 0
Carbon atoms can join together to form chains or rings,
Reset
Submit
What if constitution adoption?
Answer:
in your gaze I lost myself
Explanation:
porque eres linda mi amor
Why mouse is called direct input device ?
Answer:
because you insert it manually and directly with a cable.
pls mark as brainliest lol
Answer:
A mouse is called direct input device because it is moved by the human/robot user, inputting the signal on where the cursor should go and what actions the cursor does.It also allows you to input and send data to the computer.
.
True or false Jesse and Ray have decided to have sexual intercourse. Ray
has been with one other partner prior to Jesse. They plan on using a
condom to protect against any STls. Jesse, who has never had sex before,
does not need to worry about getting an STI since they will be using a
condom.
Answer:
False.
Explanation:
There could be rips, holes, or the condom may fail. Condoms only HELPS lower your chances for STI's/STD's.
This is the location at the surface where an earthquake started
O epicenter
O middle
hot spot
seismometer
Please help
Prevention of Foodborne Illness
Food purchased from the grocery store may contain pathogens that cause foodborne illness. To reduce the risk of illness, follow proper procedures for food preparation and storage.
Drag the appropriate items into their respective bins.
1- Divide large pots of soup into smaller batches before cooling.
2- Use a food thermometer to make sure meat has reached an appropriate internal temperature.
3- Thoroughly wash cutting boards used for cutting raw meat before slicing fresh vegetables on them.
4- Do not use color as an indicator of how well-cooked meat is.
5- Wash hands correctly before and after handling food.
6- Refrigerate leftover food within 2 hours.
7- Thaw meat on the bottom shelf of the refrigerator.
8- Wash fresh fruits and vegetables before preparing and/or eating.
Clean Combat Cross-Contamination Cook Chill
Answer:
1- Chill
2- Cook
3- Combat Cross-Contamination
4- Cook
5- Clean
6- Chill
7- Combat Cross-Contamination
8- Clean
Explanation:
A foodborne illness (also known as food poisoning) is an illness caused by eating contaminated foods by harmful microorganisms such as bacteria (e.g., Escherichia coli), viruses, parasites, and/or toxins (e.g., mycotoxins) contained in foods. Some of the most common symptoms of food poisoning include vomiting, nausea and diarrhea. Foodborne illnesses are generally caused by improper practices in the home kitchen, i.e., improper handling, preparation and food storage. Cross-contamination refers to the transfer of harmful microorganisms/toxins from one substance to another. The most common contributing factors to cross-contamination include equipment-to-food contamination, food-to-food contamination, and people-to-food contamination. The most important habit to prevent cross-contamination is washing hands and foods before eating and cooking. Moreover, cooking foods to proper temperatures can destroy microorganisms/toxins that cause foodborne illnesses. Finally, chilling (at 8˚C or below) and freezing (at -18° C) foods can also protect from food-borne illnesses as many harmful microorganisms cannot grow at these temperatures.
How does coral bleaching impact humans?
Answer:
Coral bleaching and associated mortality not only have negative impacts on coral communities, but they also impact fish communities and the human communities that depend on coral reefs and associated fisheries for livelihoods and wellbeing.
Two advantages of saving money?
Answer: 1) You’ll be financially independent sooner
2) You won’t have to worry if you’re hit with any unforeseen expenses
Explanation:
1) Building up a savings nest egg can help you achieve this aim, as you could use these funds to help get on the property ladder, or to pay off student debts
2) If you’ve got savings in place, you can use some of these to cover costs, without having to turn to a credit card or personal loan to make ends meet.
Rapid cell proliferation can result from:____.
a. a cell ignoring a negative growth regulator.
b. contact inhibition.
c. a mutation inhibiting the action of a positive growth regulator.
d. the surgical removal of a benign polyp.
Answer:
a. a cell ignoring a negative growth regulator.
Explanation:
Hope it helps :)
Many factories release carbon dioxide directly into to atmosphere. The carbon dioxide would be considered an)
A) primary pollutant
B) placer deposit
C) invasive species
D) secondary pollutant
E) scrubber
Evolution best explains
O
the biological changes in species over time
O
how organisms obtain energy
why organisms originally came into existence
O
O
the ways organisms grow and develop
Describe at least two costs and two benefits of wind farms. !!!! ASAP plzz
Which interaction involves only one of Earth's spheres?
Answer:
Energy stored in plants is transferred to humans and animals that eat them. Biosphere is a sphere on earth where living organism forms a biotic community.
Explanation:
What are the potential hazards relating to materials handling injuries?
which of the following is a good effect soil erosion
A. clogging of irrigation
B. decrease of food production
C. deposition of mine tailings
D. shaping of landforms
Answer:
i think shaping of landform is the good effect of soil erosion