Answer: Mitosis and meiosis are alike in that they both are a kind of cell division. They are different in that mitosis produces two cells identical to the original, while meiosis produces cells that only have half the chromosomes of the original. Meiosis ends up with haploid cells, while mitosis endup with diploid cells.
Explanation:
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:
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Answer:
4: issac newton
5.D
6. d
Explanation:
yeah
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)
true or false mutation alone can cause rapid evolution
Answer:
true ig
Explanation:
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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It is said that the Industrial Revolution began climate change in the 1800s. Why is it that significant
changes to climate aren't seen until the mid 1900s?
Answer:
Because in 1900s more revolutions took place and more pollution was done.
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Do you think that plants can get the building materials they need to grow from soil wateror air? Which ones? Explain your answer
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.
Rewrite the TEKS for taxonomy as if you were explaining it to a kindergartener.
(A) define taxonomy and recognize the importance of a standardized taxonomic system to the scientific community;
(B) categorize organisms using a hierarchical classification system based on similarities and differences shared among groups; and
(C) compare characteristics of taxonomic groups, including archaea, bacteria, protists, fungi, plants, and animals.
please help with my biology
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:
A tick crawls onto a cat and attaches to the cat's skin which type of symbiotic relationship is being described
Answer:
Parasitism!
Explanation:
The tick is being benefited while the cat suffers.
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.
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.
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
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
I NEED HELP WITH THESE TWO QUESTIONS! Brainliest for correct replies!
Answer:
5 Million Years Ago
Explanation:
Tell me if I'm wrong I'll fix it. Thx!
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.
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.
Which term best describes the pattern of distribution for the human population shown in the picture?
Answer:
even.
Explanation:
The connection between genes and polypeptides involves another type of nucleic acid called _______.
Answer:
Translation
Explanation:
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:
- Eijiro <3
6. The first trial of a controlled experiment allows a scientist to isolate and test
(1) a logical conclusion (2) a variety of information
(3) a single variable (4) several variables
Answer:
(3) a single variable
Explanation:
A control experiment can be defined as an experiment in which a condition assumed to be a probable cause of the effect is being compared to the same situation by the scientist without involving or using the suspected condition.
Controlled variable refers to anything or quantity such as group, person, event, etc., that is held constant by the researcher during an experiment and as such is limited.
The first trial of a controlled experiment allows a scientist to isolate and test a single variable.
Generally, most scientific experiments usually have a control group so as to avail scientists (experimentalists) an ability to compare the outcome of their test results before testing a single variable. This control group is not given the treatment or influenced by the same single (independent) variable as the experimental group.
Therefore, this is the reason why science completely or totally rejects any hypothesis which is not supported by observations, as well as the results obtained from control experiments.
This ultimately implies that, for any hypothesis to be acceptable in science, it must be supported by observations and the results of control experiments; this give rise to factual informations, theories and by extension solutions to problems.
please answer this. i need this.
Answer:
The scorpionsExplanation:
If you look the scorpion would only eat the insects so if the insects were removed then the scorpions wouldn't have any food and would die out causing extinction.
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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
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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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
(NO LINKS)
In the transcription process, segments of DNA serve as templates to produce what kind of base sequences in RNA molecules?
A. complementary
B. identical
C. opposite
D. random
Answer:
A.
Explanation:
I don't have an explanation
In the transcription process, segments of DNA serve as templates to produce complementary RNA molecules.
Ribonucleic acid (abbreviated RNA) is a nucleic acid present in all living cells that has structural similarities to DNA. Unlike DNA, however, RNA is most often single-stranded. An RNA molecule has a backbone made of alternating phosphate groups and the sugar ribose, rather than the deoxyribose found in DNA. Attached to each sugar is one of four bases: adenine (A), uracil (U), cytosine (C) or guanine (G). Different types of RNA exist in cells: messenger RNA (mRNA), ribosomal RNA (rRNA) and transfer RNA (tRNA). In addition, some RNAs are involved in regulating gene expression. Certain viruses use RNA as their genomic material.
Ribonucleic acid, or RNA. I often think of RNA as being the less well-known cousin of DNA, particularly for people outside the field of biology or genomics. But really, when you think about it, RNA, in so many ways, is the actual functional form of nucleic acids that really the body uses to do the business of, you know, constructing cells or responding to immune challenges, of carrying amino acids from one part of the cell to the other, that quite often I feel that RNA doesn't get the respect it deserves. So what I think we can share is that the different forms of RNA -- mRNA, tRNA, rRNA -- each in their own way have absolutely fundamental functions without which the biology of the genome could not be translated into practice.
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Answer:
the following picture attached will help you
Explanation:
DNA makes RNA makes proteins
it starts with the relpication process above it, it will be DNA then it does a transcription process to mRNA(RNA) and then the last process called translation process into Proteins....
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