Answer:
A cell whose genetic material isn't found in a membrane bound nucleus.
Explanation:
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Answer:
5 Million Years Ago
Explanation:
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The use of pesticides and fertilizers is carefully monitored because of the effect they can have on the environment Which of the following is a possible negative effect of the use of these chemicals on the environment?
Pesticides are known to enter into the bodies of animals via chemicals in the water (the pesticide will soak into the sod and spread to underground water), which can cause reproductive defects and harm (DDT, for example), which can decline the population of said species, giving a chain reaction to other organisims dependent on the endangered species.
why are some penguin species geographically isolated from other penguin species?
Answer:
Penguins generally live on islands and remote continental regions free from land predators, where their inability to fly is not detrimental to their survival. Penguins are usually found near nutrient-rich, cold-water currents that provide an abundant supply of food. ...
Explanation:
Penguins generally live on islands and remote continental regions free from land predators, where their inability to fly is not detrimental to their survival. Penguins are usually found near nutrient-rich, cold-water currents that provide an abundant supply of food.
What do you mean by predators?Predators are organisms that hunt and kill other organisms for food. The organisms that are consumed by the predators are known as the prey. Predators can be carnivores and omnivores. Lions, tigers, sharks, and snakes, all are predators.
Moreover, the best-known examples of predation involve carnivorous interactions, in which one animal consumes another. Think of wolves hunting moose, owls hunting mice, or shrews hunting worms and insects.
Therefore, predators are wild animals that hunt, or prey on, other animals. All animals need food to live. Predator animals need the flesh of the animals that they kill to survive. Weasels, hawks, wolves, mountain lions, and grizzly bears are all predators.
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Answer:
4: issac newton
5.D
6. d
Explanation:
yeah
Chromosomes often exchange segments of DNA during meiosis. How might this increase the survival of a species?
Answer:
Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase
which statement about DNA replication is true?
A. Prokaryotes only have one origin of replication to initiate replication
B. Prokaryotes can only replicate their single circular chromosome in the nucleus.
C. Eukaryotes can only replicate one segment of a chromosome at a time.
D. Eukaryotes only have one circular chromosome that unwinds at multiple locations.
When the population of ant (prey) increases, what would you predict the population of the ant-lion (predator) would do?
A. Decrease
B. Increase, because there is more food available to them.
Answer:
B
Explanation:
When there’s more food, the populations that depend on that food with flourish. It is also worth noting for future questions that a decrease in predation will usually lead to an increase in a population of prey. Hope this helps :)
The population of ant (prey) increases, what would you predict the population of the ant-lion (predator) would :
B. Increase, because there is more food available to them.
The population of ant (prey) increases, what would you predict the population of the ant-lion (predator) would increase, because there is more food available to them.When there is more food, the population that depends on it will prosper. For future questions, it is also worth noting that a decrease in predation usually leads to an increase in prey population.Thus,the correct answer is B.
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Add 3 Glucose molecules (1 pt)
Answer:
Explanation:Glucose is a monosaccharide containing six carbon atoms and an aldehyde group, and is therefore an aldohexose. The glucose molecule can exist in an open-chain (acyclic) as well as ring (cyclic) form. Glucose is naturally occurring and is found in fruits and other parts of plants in its free state.
What do we call animals that enable plants to sexually reproduce
Answer:
Sexual reproduction is the production of a new organism from two parents by making use of their sex cells or gametes. The humans, fish, frogs, cats and dogs, all reproduce by the method of sexual reproduction.
Explanation:
Answer:
Gametic Cells
Explanation:
Gametic Cells are called sex cells that enables the process of reproduction in both organisms
19. Salinization may be caused by
a. crop rotation.
b. long-term irrigation.
c. high rainfall.
d. All of the above
Answer:
The correct answer is A. crop rotation.
Explanation:
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A homeowner is interested in conserving energy and money by changing their heating and cooling habits in their home. Their
monthly bill for heating their home is approximately $200 in the winter months. By setting their thermostat one degree lower, the
homeowner can save 5% of their energy bill in the winter. Calculate how much the homeowner will save in one winter month is they
set the thermostat to three degrees lower than normal.
A)
$10
B)
$20
C)
$30
D)
$5
Answer:
A $10
Explanation:
5÷100=20 20÷200=10 so therefore the answer is $10
Distinguish between phenotype and genotype.
Explanation:
Phenotype is the PHyiscal trait e.g height, eye colour and blood type.
Genotype is the GENE of the trait or the alleles. E.g height; tall is T, short is t. these are the alleles that could make up the height.
how does fossil fuel use affect the climate
Answer:
Fossil fuels produce large quantities of carbon dioxide when burned. Carbon emissions trap heat in the atmosphere and lead to climate change. In the United States, the burning of fossil fuels, particularly for the power and transportation sectors, accounts for about three-quarters of our carbon emissions.
Explanation:
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The main reason why this type of model would be developed is that an animal cell
A. is too large to be observed directly
B. is too small to be observed directly
C. moves too quickly to observe directly
D. poses too much risk to observe directly
What do you mean by respiration?
Answer:
respiration is the process of intake of oxygen and excrete out a carbon dioxide by our body.
Answer:
a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.
Scientists use many resources to piece together the history of life on Earth. The fossil record is one source of information that can help scientists understand the way life on Earth has changed over millions of years. What does the fossil record tell us about the history of different species on Earth?
Answer:
See explanation
Explanation:
Fossil records contain an extensive detail of the evolution of various species on earth which have been preserved in the remains of these organisms or imprints that organisms that existed long ago must have left in sedimentary rocks.
Fossil records basically tell us about the past. They tell us about the species that once existed on earth. They also tell us how long these species existed and how the were related to other species.
This information help us to work out how these organisms lived and the environment where they lived.
Answer: B
Species remain the same over time.
Explanation:
Which of the following is most clearly a benefit of genetic engineering?
The production of insulin hormone by the bacterial genes is the most likely benefit of genetic engineering.
Answer:
The production of insulin hormone by the bacterial genes is the most likely benefit of genetic engineering-
Explanation:
production of human insulin through genetic modification of bacterial genes
D
Multigene families include two or more nearly identical genes with related functions. A classical example is the set of genes for globin molecules, including genes on human chromosomes 11 and 16. Some of these genes produce hemoglobin only in the fetus or embryo. Others are very similar to functional genes, but have accumulated mutations and are no longer functional. A scheme of alpha globin gene family and beta globin gene family. The alpha globin gene cluster is located on chromosome 16 and includes the loci zeta, pseudozeta, pseudoalpha-2, pseudoalpha-1, alpha-2, alpha-1, pseudotheta. The zeta gene produces hemoglobin in the embryo; alpha-2 and alpha-1 produce hemoglobin in the fetus and adult. The beta-globin locus is located on chromosome 11. The order of the genes in the beta-globin cluster is epsilon, gamma-G, gamma-A, pseudobeta, delta, beta. Epsilon produces hemoglobin in the embryo, and gamma-G and gamma-A produce hemoglobin in the fetus. Delta and beta produce hemoglobin in the adult. What is the most likely mechanism for a gene sequence moving from one chromosome to another
Answer:
Transposition to different chromosomes by the ancestral gene
Explanation:
Transposable Elements (TEs), also known as jumping genes, are genetic mobile elements which are able to move from one location to another on the genome. There are two major mechanisms of TE transposition: 1-cut-and-paste mechanism, where one particular TE is inserted into a new position on the genome without replication, and 2-copy-and-paste mechanism, where a new copy is generated and the original TE remains at the original genomic site. In this case, it is likely that new TE copies containing the ancestral (duplicated) gene have proliferated through the copy-and-paste mechanism.
When a stream's velocity decreases from 300 to 200 centimeters per second, which size sediment will be deposited?
Middle size sediment will be deposited on the ground when the speed of flowing water decreases.
Deposition of sedimentsWhen a stream's velocity decreases from 300 to 200 centimeters per second, the middle size sediment will be deposited because of the lowering velocity of the stream. Big size sediments hardly move by the water of the stream.
While on the other hand, middle and small sized sediments easily moved by the flowing water due to their light weight so we can conclude that middle size sediment will be deposited on the ground when the speed of flowing water decreases.
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When the computer you are working on uses energy it also produces waste energy. What type of energy is this waste energy
Answer:
Chemical energy
Explanation:
I just took the exam!!
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While playing baseball with his friends, Reyes was almost hit in the face with a fast ball. Neurotransmitters in his _____ were released, triggering the firing of neurons throughout his brain and the release of chemicals throughout his body. His heart beat quickened, his pupils dilated, and his respiration increased.
hypothalamus
I hope this helps
Researchers examined the ability of cultures of the bacterium Pseudomonas aeruginosa to adapt to the antibiotics ceftazidime and avibactam when they are administered together. The researchers grew four replicate cultures in growth medium with no antibiotics added (control) and four additional replicate cultures in the same growth medium with added ceftazidime and avibactam. At the conclusion of the experiment, samples of the replicates exposed to the antibiotics were removed and their genomes were sequenced. All of the antibiotic-resistant mutants were missing three genes (hmgA, galu, mexXY). It is known that one of these three genes makes wild-type P. aeruginosa susceptible to the two antibiotics. However, the researchers do not know which gene it is. Which of the following experiments would specifically determine which gene is responsible for ceftazidime- avibactam sensitivity in P. aeruginosa ?
A. Clone the three deleted genes from a wild-type P. aeruginosa strain, and insert these sequences into the mutant bacterial strains to restore sensitivity to ceftazidime-avibactam.
B. Delete genes that are homologous to the three deleted genes in other bacterial species, and determine if doing so also confers ceftazidime-avibactam resistance in those bacteria.
C. Perform qene knockout (targeted mutation) of either the hmgA, galu, or mexXY gene on separate cultures of the wild-type P. aeruginosa. For each individual mutant, determine whether or not ceftazidime-avibactam resistance has occurred.
D. Perform gene knockout (targeted mutation) of both the hmgA andgalu genes of the wild-type P. aeruginosa in a single culture, and then determine if ceftazidime-avibactam resistance has occurred in the mutant strain.
Answer:
The correct answer is - option C.
Explanation:
The researcher found that the three genes hmgA, galU, and mexXY were missing from antibiotic-resistant mutants. It is known now that one of these genes is responsible for the susceptibility to the two antibiotics of wild-type P. aeruginous.
Performing gene knockout (targeted mutation) of all three genes on separate cultures of the wild-type P. aeruginosa would help to know which gene is responsible by determining if ceftazidime-avibactam resistance has occurred for each gene or not.
I control all metablic activities of the cell
Answer:
What do you mean by I control all metabolic activities of the cell
The parenting style that can be described as lenient or inconsistent is called __________.
A. authoritarian
B. authoritative
C. permissive
D. backbone
Answer:
You're answer is C - Permissive!
Explanation:
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Answer:
C. Permissive
Explanation:
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Which of these is a property of tsunami waves? (1 point)
high frequency
very high speed
short wavelengths
very large amplitude
Answer: The answer would be high frequency
Explanation:
state three reasons for preventing food spoilage
Answer:
1) Refrigerate or freeze
If you freeze or refrigerate the food, the bacteria or whatever organism growth will slow down in the food by a Greta amount due to the coldness. Refrigerate might be a temporary food soteage for like a week or 2/ month max. While freezing will just freeeze the bacteria and mold on the food which can be stored up to 3- 12+ months even. But then again it will be most likely flavorless by the end or have no nutrients value. You can stores mik in the freezer for a while but its not recommended to taste, same for other thing syou usually see in the fridge, eggs/ vegetables/fruits/ milks/ yogurts/ etc.
2) No moisture, no water of any kind (drying in the sun or salted)
So every living thing we know of needs water. Including bacteria and mold. Without water, theres no place to thrive. No place to thrive means no bacteria and food is safe for a good amount of time. Dried foods can last a really long time, sure some types are really unpleasant but its edible. But you can’t techincally “dry” meat since it will be A whole nest for flies before it even reaches the halfway mark. You can slat it which will lessen he time but still really efficient. Salt absorbs water and breaks down any type of Stuff. Its like a mini acid.
3) Canned good and no air access (Pressurized/ controlled container)
This is done by putting all your favortie food in a metal container. With no air access, the bacteria or mold in the food already in can’t escape and new ones can’t get in. THe can then is boiled to a certain tempature where then the bacteria dies. Now the food can even be perishable stuff like meat (most common fishes), fruits and even a nice can of liquid soup. Nothin g can get in. Nothing can get out but nothing CAN get out becuase eveythign is dead. Canned food can last REALLY LONG, good for long term expeditions without a fire or food.
Answer:
Drying is one of the most ancient food preservation techniques, which reduces water activity sufficiently to prevent bacterial growth. Refrigeration preserves food by slowing down the growth and reproduction of microorganisms and the action of enzymes which cause food to rot
Explanation:
Which of the following is not a major component of blood in humans? AEpithelial cells BRed blood cells CWhite blood cells DPlasma EPlatelets
Answer:
A - Epithelial cells
Explanation:
Epithelial cells are cells that come from surfaces of your body, such as your skin, blood vessels, urinary tract, or organs. They serve as a barrier between the inside and outside of your body, and protect it from viruses. A small number of epithelial cells in your urine is normal.
A scientist is raising the temperature of a sample of water to find out if the amount of salt that can be mixed into the water changes. Which
the independent variable in this investigation?
b
ОООО
the amount of water in the sample
the temperature of water
the amount of salt that mixes in the water
the type of salt mixed into the water
Answer:
i think is the temperature of water(b)
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Do you think genetics play a role in the different skin colors we have on the top of our arms vs the bottom? Why or why not?
Answer:
the top of our arms may be darker because they get more exposure to the sun than under our arms causing them to be lighter