1. true
2. false
3. false
✔ true
DNA contains all the genetic information within an organism.
✔ false
DNA translates nitrogenous bases into proteins.
✔ false
DNA contains many chromosomes that are passed from parent to offspring during reproduction.
The cell-cycle control system initiates chromosome segregation only after _________ has occurred
Answer:
metaphase
Explanation:
The cell cycle control system initiates chromosome segregation only after metaphase has occurred.
At metaphase, the chromosomes of a dividing cell align at the equator to form what is known as the metaphase plate. Each chromosome gets engaged by spindles from the opposite sides of the poles at the kinetochore of the centromere.
Thereafter, the cell proceeds to the anaphase stage during which the shortening of the spindle fibers pulls the chromosome apart into sister chromatids and this eventually causes the sister chromatids to start migrating to opposite poles of the cell.
How do aquatic factors affect the distribution of aquatic life (include both biotic and abiotic factors)? If possible, please answer in 6 or more sentences!!!
Answer:
Both the biotic and abiotic factors contribute to the distribution of the aquatic life in oceans, rivers etc.
Areas of the ocean which are unfavorable for organisms will have very little biodiversity. On the other hand, areas which have favorable living conditions will have most of the biodiversity of the aquatic life.
Some of the factors on which aquatic distribution depends are:
Temperature: Temperature is one of the crucial factors in determining the distribution of the aquatic life. Lesser fishes will be able to survive the harsh, freezing temperatures, hence the biodiversity will be low in such areas of the oceans. The aquatic distribution will be more in warmer areas of the ocean.
Light: Areas of the ocean or rivers which receive more light will have more plants in those areas. This is because photosynthesis requires light energy from the Sun. More plants means that more aquatic animals will also be present in those areas to feed on them.
Preys: Aquatic distribution will be more in areas where there are larger quantities of small fishes. This is because small fishes are the prey for many bigger fishes.
Which occurs when the body responds to the environment by maintaining a stable internal environment despite changing
external conditions?
O spontaneous generation
O homeostasis
growth and development
O reproduction
Mark this and return
Save and Exit
Next
Submit
Kim has a poor appetite and has lost a severe amount of weight in the past few months. She is unable to concentrate or make decisions. She no longer wants to live and wishes to die. Psychologists are most likely to diagnose Kim with:
Answer:
Depression
Explanation:
Everything happen to Kim could be treatment.. There is no reason to die. She needs to be strong to avoid the negative things that impact her thinking..Try to be happy, exercise and have good friend... If she keep doing the nice things , the good thing will come to her. I hope this partial ideas will help her to overcome this difficult time.
Final answer:
Psychologists would likely diagnose Kim with major depression, as her symptoms include significant weight loss, poor concentration, and suic-idal ideation.
Explanation:
Given the symptoms described, psychologists are most likely to diagnose Kim with major depression. Major depression is characterized by a combination of symptoms that can include significant weight loss (when not dieting), difficulty concentrating, su-icidal ideation, and a general loss of interest in daily activities or life. These symptoms align with what Kim is experiencing: poor appetite with severe weight loss, an inability to concentrate or make decisions, and an explicit desire not to live. It's crucial for someone with these symptoms to seek professional help, as these are signs of a serious psychiatric condition that requires intervention.
Furthermore, the urgency of the situation is heightened because thoughts of suic-ide or self-harm are present. Su-icide risk is elevated among individuals with major depression, and immediate support from mental health professionals is often necessary to ensure the safety and well-being of the person affected.
Scientists discovered fossils in several layers of the Earth you see here. They found fossils of algae, snails, and clams in layer D. Given that information, where do you think they found fossil evidence of simple land plants and amphibians?
A) A
B) E
C) F
D) G
(This is on USA Test Prep)
Answer:
The answer is C. F
Explanation: I did this on USATESTPREP
Answer:
C
Explanation:
I did it on USATestPrep
Osteoporosis is more prevalent among women than men because women generally
Answer: Osteoporosis is more prevalent among women than men because women generally have more bones in their bodies than men have. take in more calcium than men take in. have lower bone mass than men have. exercise more than men do.
Explanation: Becouse i think thats it
Answer:
Have lower bone mass than men have
Explanation:
7. Which has an exoskeleton?
A. a rhinoceros
B. a ladybug
How does recombination contribute to evolution?
Answer: This crossing-over process results in an unlinking and recombination of parental genes. ... Subsequently, recombination by itself does not cause evolution to occur. Rather, it is a contributing mechanism that works with natural selection by creating combinations of genes that nature selects for or against.
Explanation:
Hope this helps!
Answer:
Recombination is an event, occurring by the crossing-over of chromosomes during meiosis, in which DNA is exchanged between a pair of chromosomes. ... Like mutation, recombination is an important source of new variation for natural selection to work upon.
Explanation:I just right on my test, unit test, assignment,and unit exam.
You are a molecule of nitrogen. Choose a starting point in the nitrogen cycke and describe the process you would go through to move through the entire cycle
Answer:
Starting from the air
Explanation:
First Nitrogen in the air makes its way into the soil where nitrogen fixation occurs. This is done by specialised nitrogen fixing bacteria where it either becomes ammonia or ammonium. This is called ammonification. Nitrifying bacteria uses these components to create nitrates and the cycle moves into assimilation where this is taken up by plants and animals. Finally, denitrification occurs when the organic matter that took up the nitrogen decomposes to release the nitrogen back into the air.
Cotton plants produce seeds that contain high-quality protein. This protein could be used as a food source except that the seeds are poisonous to humans. Recently, scientists have inserted a section of DNA into the cotton plants that makes the cotton seeds nonpoisonous. The technique for this procedure is known as _____.
A. gene manipulation B. cloning
C. reproduction
D. direct harvesting
Changes to an ecosystem’s biodiversity can have a direct effect on humans because humans –
A : inhabit all areas of the Earth’s ecosystems.
B : use minerals from the ground to make things
C : rely mostly on solar power for energy.
D : depend on the Earth’s natural resources
Answer:
The answer should be D.
Changes to biodiversity can affect humans because they depend on Earth's natural resources.
Explanation:The correct answer is D: depends on the Earth's natural resources.
Changes to an ecosystem's biodiversity can have a direct effect on humans because humans depend on the Earth's natural resources. Biodiversity refers to the variety and abundance of different species in an ecosystem. These species play important roles in providing resources such as food, water, and medicine, which are essential for human survival and well-being.
For example, if the biodiversity of a forest ecosystem decreases due to deforestation, humans may lose access to important resources such as timber for construction, medicinal plants, and clean water sources. This can have negative impacts on human health, livelihoods, and overall quality of life.
Learn more about the Effect of changes to biodiversity on humans here:https://brainly.com/question/31200760
#SPJ5
What enzyme is lacking in the Escherichia coli strain used by Okazaki in the experiments leading to his discovery of the DNA fragments that will form the lagging strand?
a) DNA polymerase
b) telomerase
c) DNA ligase
d) pyrophosphatase
36. Mammals are exposed to a variety of outside temperatures. However, they are able to
maintain a constant internal body temperature. Describe ways that mammals warm and
cool themselves in response to their environment. Include in your response:
Answer:
they cool them selfs by getting in water they heat themselfs by laying in the sun.
Explanation:
is this the answer your looking for?
The energy content and biomass of ________ is lowest in a terrestrial food web. The energy content and biomass of ________ is lowest in a terrestrial food web. small carnivores such as spiders and lizards primary consumers top carnivores detritivores and decomposers producers
Answer: top carnivores
Explanation:
The energy content and biomass of top carnivores is the lowest in a terrestrial food web, due to energy losses at each trophic level.
Explanation:Within a terrestrial food web, two types of food webs are commonly identified: a grazing food web and a detrital food web. In a grazing food web, producers like plants serve as the base and are followed by various levels of consumers, including herbivores and carnivores. In contrast, a detrital food web is based on organisms that feed on decaying organic matter, including decomposers and detritivores.
Generally, the energy content and biomass of top carnivores would be the lowest in a terrestrial food web due to the energy lost at each trophic level. The energy content and biomass of primary consumers, such as herbivores, would not be the lowest as they directly consume the producers, which are abundant. Detritivores and decomposers, while they deal with dead organic matter and recycle nutrients, are also not positioned at the bottom of the energy pyramid. It's important to understand that detritivores and decomposers support the food web in a different way by breaking down waste and dead organisms, thus recycling nutrients back into the ecosystem.
During rolling-circle replication, RepA binds to the ori and nicks one strand of the DNA. The ______ end of the nicked DNA serves as a primer and is extended by DNA polymerase, while the ______ end is coated with single-stranded DNA-binding proteins and replicated using RNA and DNA polymerases.
Answer:
E
Explanation:
Which of the following build(s) new strands of DNA? View Available Hint(s) Which of the following build(s) new strands of DNA? The origins of replication The lagging strand The leading strand DNA polymerases Parental DNA
Answer:
DNA polymerases
Explanation:
DNA polymerases are enzymes that are responsible for the synthesis of DNA strands from the DNA building blocks called deoxyribonucleotides.
DNA polymerases are usually involved in DNA replication, by creating a pair of identical strands of DNA from a single molecule of DNA, in other words, two identical molecules of DNA are formed from the copying of a double stranded DNA.
DNA polymerases are found in both eukaryotic cells and prokaryotic cells.
DNA polymerase builds new strands of DNA from the already existing DNA molecule. Therefore, the correct option is D.
DNA synthesis occurs through semiconservative replication, in which a new DNA strand is synthesized using a pre-existing DNA molecule as a template.
There are multiple enzymes that help in the process of replication, of which the major role is played by DNA polymerase.
DNA polymerase adds nucleotides in the newly synthesizing strain in the 5'-3' direction.The nucleotides are added complementary to the template strand which is read in the 3'-5' direction.
Learn more about DNA synthesis in:
https://brainly.com/question/15052390
#SPJ6
Which best describes an organism's niche?
life span
habitat
environment
role
Answer: Role
Explanation:
Answer:
The answer is D.) role
also you dont have to but it would mean a lot if i could have my first brainliest
A cane toad produces a toxin (poison) in a gland behind its ear which can kill predators
that try to catch it and eat it for food. Some hedgehogs have a mutation which blocks
this toxin (poison) from entering their cells and keeps them from being harmed when
they catch and eat a cane toad,
Based on the information given above, Pick the statement below that best describes
the mutation of the hedgehog.
This mutation is neutral because it doesn't really help or hurt the hedgehog.
This mutation is harmful because the poison would still be in the body of the hedgehog if it ate the
cane toad.
This mutation is helpful because it makes the hedgehog immune to the cane toad toxin (poison) so
the hedgehog has more food sources for survival.
This mutation is helpful because it might make the hedgehog not be harmed by all toxins
(poisons).
Answer:
the first one
Explanation:
the mutation is nuertal because hedgechogs dont eat that much meat
Some shells grow
a. Rainbows
b. Four feet long
C. Butterfly wings
The Earth has a total land area of approximately 150 million
square km. About how much is covered by rain forest?
A. 1.5 million square km
B. 10.5 million square km
C. 15 million square km
D. 50 million square km
Answer:
C. 15 million square km
Explanation:
The Earth has a total land area of approximately 150 million square km. Scientists estimate that roughly 10% of the entire Earth is covered by Rainforests. That would make the total land mass covered by Rainforests to be about 15 million square km in distance. Although this number is decreasing drastically due to Ranching, mining, logging and agriculture.
Answer:
C. 15 million square kilometer
Explanation:
Rainforest refers areas of the Earth characterised by tall evergreen trees. The rainforest also has high amount of rainfall.
It helps to regulate our climate and provide us with everyday products.
They are structured in four layers which includes:
• Emergent layer
• Canopy layer
• Understory layer
• Forest floor layer
The approximate total land mass of the Earth is 150 million square kilometer.
The rain forest covers 15 million square kilometer of the total land mass of the Earth.
What is biodiversity?
A. a lack of different types of plant and animal species within a particular region
B. an abundance of different types of plant and animal species within a particular region
C. the different types of plants and animals that live in freshwater habitats
D. a method of conserving the planet’s small amount of potable water
Answer:
B. an abundance of different types of plant and animal species within a particular region
Biodiversity is the abundance of different types of plant and animal species within a region, which includes species, genetic, and ecosystem diversity. Answer B is correct, as it defines biodiversity as an abundance of different life forms in a region.
Biodiversity refers to the diversity (number and variety of species) of plant and animal life within a particular region. It encompasses the variety of living organisms, including their genetic differences and the ecosystems they form. To answer the question, biodiversity is:
B. an abundance of different types of plant and animal species within a particular region.
There are various types of biodiversity recognized by scientists:
Species diversity, which considers the number and kinds of species present in an area.Genetic diversity, which is represented by the variety of genes within a population and is essential for a species' adaptation.Ecosystem diversity, which includes the variety of ecosystems found in an area or on the planet.Biodiversity is essential for maintaining healthy ecosystems and provides resilience against environmental changes. It contributes to the sustainability of our natural world and is key to the discovery of new resources like food crops and medicines.
This is the application of a wide range of sciences to answer questions of interest to a legal system. DNA analysis is one component that may be used to place a suspect at a crime scene is called
Answer:
This is the application of a wide range of sciences to answer questions of interest to a legal system. DNA analysis is one component that may be used to place a suspect at a crime scene is called Forensic science
Explanation:
Forensic science the use of fingerprint, DNA to detect crime occurrence which gives accurate results as each individual is made of different DNA molecule
I don’t know anything about the 4 types of natural selection can somebody please help me?
Stabilizing – the intermediate phenotype is favored 8. A population of Madagascar hissing cockroaches lives in a woodpile. It suffers heavy predation from lizards. Because their heads are small, the lizards are unable to eat the very largest adult cockroaches, and instead prey upon small and medium sized adults.
What are two ways that diatoms differ from slime molds?
. Just as energy flows through an ecosystem, matter also moves from organism to organism and from organisms to the environment. Using either a kelp forest or a hydrothermal vent ecosystem as an example, explain how carbon can move through the organisms in that ecosystem
The kelp ecosystem consists of the Kelp(Producers) →Sea urchins( primary consumers)→ Horn shark (secondary consumers)→ Northern elephant seals(tertiary consumers).
Explanation:
Kelp are the producers of this ecosystem in which uses sunlight to produce organic compound which is used by the primary consumers.
The primary consumers are herbivores. They feed on the algae and other plant material( organic material)
The secondary consumers feed on the herbivores. This is also a source of carbon to organism.
Then the tertiary consumer consumes the secondary consumers. So, the flow of energy starts from the producers and continues till the largest group of organism present in kelp ecosystem.
Then when the organism dies the carbon and the organic compound is made available in water by the help of the various bacteria and fungi.
This is how the continuous flow of carbon takes place in the kelp ecosystem.
Producers to herbivore to carnivores and so on.
In kelp forest, carbon can move through the organisms in that ecosystem when the herbivores feed on the vegetation because the producers fixes atmospheric carbon in its body in the form of carbohydrates. The herbivores release carbondioxide in the process of cellular respiration with the addition of water and energy in the form of ATP so in this way the carbon moves in the kelp forest.
Learn more: https://brainly.com/question/15519566
Light energy+CO2+H20=C6 H12 06+02 (the equation for photosynthesis)
Construct an explanation to describe the cycling of matter and energy that occurs during photosynthesis. Use the chemical equation to provide evidence.
Explanation:
Photosynthesis is the process by which photosynthetic organisms transform light energy into chemical energyPhotosynthesis is an oxidative reductive metabolic pathway in which water is oxidized and carbon dioxide is reduced to carbohydrates Light reaction of photosynthesis is concerned with light dependent oxidation of water and synthesis of high energy compounds such as ATP and NADPHAll proteins and cofactors which involves in light reaction are present in thylakoid membrane hence light reaction of photosynthesis completed in thylakoid membrane Transfer of electron and protons in thylakoid membrane is carried out by four protein complexes and two mobile electron carriers Oxidation of one water molecule generates two electrons, two protons and one atom of oxygen Transfer of one electron from Photosystem II (PSII) to Photosystem I (PSI) requires one photon and transfer of one electron from PSI to NADP+ requires one photon, thus transfer of two electrons from PSII to NADP+ requires four photonsFlow of two electrons from cytochrome b6f complex drives transportation of four protons from stroma to lumenThus oxidation of one water molecule establish gradient of 6 H+, gradient of 6 H+ drives synthesis of 2 ATPReduction of 1 NADP+ to NADPH requires two electrons, thus oxidation of one eater molecule generates 1 NADPH
Which of the following evidence best supports a claim that tryptophan functions as a corepressor? A. Normal expression of trpR causes the trp operon to be transcribed regardless of tryptophan levels. B. When the operator sequence is mutated, the trp operon is not transcribed. C. The trpR gene codes for a repressor protein that has a DNA binding domain. D. When trpR is mutated, the trp operon is transcribed regardless of tryptophan levels.
Tryptophan functions as a corepressor by binding to the trp repressor to inhibit the transcription of genes involved in tryptophan biosynthesis.
Explanation:When tryptophan is not present in the cell, the repressor by itself does not bind to the operator; therefore, the operon is active and tryptophan is synthesized.
However, when tryptophan accumulates in the cell, two tryptophan molecules bind to the trp repressor molecule, changing its shape, allowing it to bind to the trp operator.
This binding of the active form of the trp repressor to the operator blocks RNA polymerase from transcribing the structural genes, stopping the expression of the operon.
Predict the most likely effect of a two-nucleotide deletion in the middle of the intron located between exons 4 and 5 on the structure of protein A. Justify your answer.
Answer:
It is likely that this change has no effects on the protein function.
Explanation:
In eukaryotes, genes are composed of coding (exons) and non-coding (introns) sequences. Since introns are not transcribed into messenger RNA, mutations affecting these sequences generally are neutral; however, it is important to note that introns may regulate gene expression
Introns are the noncoding regions, which are present on the sections of the RNA transcript or DNA. The coding regions of the DNA molecules are known as exons. The introns are spliced out to continue translation.
The mutation, like insertion or deletion in the sequence of the introns, will not affect the molecule, such that it will be neutral.
Splicing is an essential process in which the sequence of introns is eliminated and only a sequence of exons are present. The splicing results in the formation of a mature RNA molecule, which is then translated into protein.
Introns are the intervening sequence, which can affect the gene expression by increasing the rate of transcription, nuclear export, and the stability of RNA transcript.
However, the introns can regulate gene expression.
Therefore, introns are the non-coding sequence, in which mutations are neutral but they can regulate the gene expression.
To know more about introns and exons, refer to the following link:
https://brainly.com/question/3398697
What was Thomas hunt Morgan‘s main contribution to science
During a chemical reaction, which of the
following does the arrow stand for?
A. relates
B. copies
C. yields
Answer:c
Explanation:
During any chemical reaction, arrow stand for yields. The correct option is C.
What is a chemical reaction?A chemical reaction is a process that converts one or more substances, known as reactants, into one or more different substances, known as products. Chemical elements or compounds are examples of substances.
In this reaction, arrow sign is used in between reactants and products which indicates that the reactant will lead to the product.
Thus, the correct option is C.
For more details regarding chemical reaction, visit:
https://brainly.com/question/3461108
#SPJ2