3. Scientists who study the cell cycle use fluorescent dyes and lasers that enable them to measure the DNA content of individual cells. They can count the number of cells with 2N and 4N DNA content, as well as in between 2N and 4N (greater than 2N, but not quite 4N yet). a. In what phase(s) of the cell cycle will cells have 2N DNA content
Answer:
G1 phase
Explanation:
The cell cycle is divided into 2 major phases
1. The interphase
2. The m phase
The interphase, in chronological order, is further subdivided into
G1 phaseS phaseG2 phaseCells grow and develop at the G1 phase while the G2 phase is characterized by protein synthesis in addition to continued growth.
The DNA of a cell in interphase is doubled at the S phase. This means that if a cell has a 2N amount of DNA at the beginning of the S phase, the amount of DNA at the end would have become 4N. This amount of DNA is shared into 2 daughter cells in equal amounts during mitosis or the m phase, meaning that each daughter cell would have a 2N amount of DNA before entering the interphase.
Hence, cells will have 2N DNA content in a period that spans through the end of the m phase of the cell cycle to the beginning of the S phase of the same cycle. This means that cells at the G1 phase would be the ones with 2N DNA contents.
Cell grows and prepare itself for replication in the G1 phase cell cycle. In G1 phase of cell cycle, cell is in 2n state.
Cell Cycle:
Cell cycle is the life cycle of the cell in which cell grow and divide. This completes in 2 phases,
InterphaseM- phaseInterphase:
Cell grows in this phase and prepare to divide. This includes 3 phases,
G1 phase In this phase cell, grow and prepare for replication.S- phase : Cell synthesizes its DNA via replication. In S- phase cell is in 4n stage. G-2 phase: Cell prepares itself for division.M- phase:
Cell condenses its chromosome and divide into 2 cell.Since, cell replicates its DNA in S-phase.Therefore, in G1 phase of cell cycle, cell is in 2n state.
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Difference between second level consumer and third level consumer
Answer:
Second-level Consumers - consumers that get their energy from first-level consumers and/or producers. Carnivores - organisms that eat only other animals. Third-level Consumers - consumers that eat second-level consumers and/or first-level consumers.
A change in DNA could alter the amino acid order which will affect the folding of the protein, and therefore it's function.
Answer:
true
Explanation:
2. Based on your results, can any conclusions be draw as to the types of habitats likely to contain the most microbes?
Answer:
Yes.
Explanation:
Yes, conclusions can be drawn from the types of habitats the most microbes likely to present because different microbes needs different types of environmental conditions. Some microbes needs moist and cool environment and can't survive in warm and dry environment while some microbes survive in dry and warm environment and die in moist and cool environment so we can draw conclusion from their habitat types.
Can the change in cyclin concentration during mitosis be explained by the fact that the cell divides in two and thus divides the material in the cell into two smaller volumes
Answer:
No, because cell division is expected to decrease not only the net amount of cyclin molecules in daughter cells but also the volume of these daughter cells compared to the original parent cell, and therefore the concentration should be nearly equal.
Explanation:
When a cell divides to produce two daughter cells, the cell components including its previously duplicated genetic material (DNA), organelles, signaling molecules, fatty acids (lipids), proteins, etc., are distributed into daughter cells. These daughter cells have a smaller volume compared to the original parent cell. In consequence, the concentration of cellular components (including cyclin proteins) should be similar between parent cell and daughter cells.
Someone please help me
Answer:
Your answer is D) Graduated Cylinder.
Answer:
Graduated cylinder
Explanation:
Liquid volume is typically measured using specific tool called graduated cylinder.
Citrus trees create their seed by a method of asexual reproduction by a process called
Answer:
Some plants can produce seeds without fertilization. Either the ovule or part of the ovary, which is diploid in nature, gives rise to a new seed. This method of reproduction is known as apomixis. An advantage of asexual reproduction is that the resulting plant will reach maturity faster.
Explanation:
Answer:
Apomixis
Explanation:
Apomixis is the method of asexual reproduction.
Hope this is correct, have a great day.
Do all three bird species occupy the same niche? Explain .
Answer:
None of the birds have the same niche.
Explanation:
They all have different niches because of the food they ate. Over time, they were gentically changing to adapt to their own food.
Economic impact of aflatoxin on health and agriculture
Answer : contamination in crops results mainly from a reduction in marketable volume
Aflatoxin consumed contributes to the mutagenic , carcinogenic , teratogenic , and immunosuppressive health effects in humans.
What is the after effect of increased temperature in the atmosphere?
Answer:
global warming
Explanation:
PLEASE HELP 47 POINTS ASAP
There is an amusement park based on sea life. Its purpose is to get the public interested and caring about conservation of the world’s oceans. Some of the profits from this organization go toward funding ocean research and conservation. In order to get people interested, some of the shows that the park offers include large marine mammals that do tricks. Some of the larger marine animals are housed in pools for viewing instead of being allowed to live in their natural habitat. They also have rare and endangered species on display to help increase awareness of them. They even have a breeding program for the some of the endangered animals.
Describe an ethical concern that would be related to this park.
Answer:
The animals don't know outside of that habit because that where they were born. If they were to be released they would die because they are not used to having to fend for themselves.
Explanation:
At a warm front warm air meets and moves cold air
Empathy means that you can communicate well with others.
A.
True
B.
False
Answer:
A. true
Explanation:
i mean if you have empathy then yeah it's true
Answer:
A
Explanation:
It means you have the ability to feel what someone is experiencing.
Explain what happened to the spread of the infection as more individuals were vaccinated.
Answer: As a result of more people being vaccinated the spread of the infection slowed down.
I don’t understand how to do this
Answer:
Translation: GAUGCUUCCAACGACCACTA
Transcription:
GTACGAAGGTTGCTGGTGAT
GATGCTTCCAACGACCACTA
Explanation:
Two rabbits have different parents. One rabbit has ears that flop over, and the other rabbit has ears that stand straight up. Why do the rabbits have ears with different shapes?
Answer:
The rabbits have different versions of the gene for ear shape, which instruct for different proteins that make differently shaped ears. A Father sheep has curly wool while a Mother sheep has straight wool.
Explanation:
I majored in Biology
Answer:
Explanation: Each rabbit has a different ear shape because they have different versions of the gene for ear shape that connect together to make different ear shapes. - D
Are you for, against or undecided on GMOs? Explain.
Please give your opinion <3
Answer:
AGAINST for sure
Explanation:
ive personally raised GMO animals and they have no life. like chickens at the age of 8 weeks the breasts on GMO chickens are so large they are unable to walk and if u do not butcher them they will have heart attacks at around 9 weeks. they also dont get to go outside and walk around bc that makes them lose weight. so most of the GMO chickens do not get to go outside and actually have clean air. let alone see the sun light and stand in grass.
Which of the following is the major concern with utilizing forensic DNA testing?
O keeping Innocent people out of all
treating genetic diseases as early as possible
a violation of privacy
a violation of the law
Answer: a violation of privacy
Explanation:
A person's DNA cannot be changed as it is their genetic information. It is therefore their most private information and when it is utilized in forensic DNA testing, it runs the risk of invading a person's privacy.
Forensic DNA testing works by comparing the subject DNA with a DNA database. Using this database means going through the DNA of millions of people without their consent.
This is their most private information and it is being stored and accessed without permission. Critics say that this is a violation of privacy and many studies have showed that this is a major concern
Why is crossing over of the chromosomes during meiosis
important?
Because it increases the genetic variability, offering more combinations of genotypes.
I NEED HELP The measure of how resistant a solid is to shape change when a force is applied.
Hardness is a measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied Macroscopic hardness is generally characterized by strong intermolecular bonds, but the behavior of solid materials under force is complex; therefore, there are different measurements of hardness: scratch hardness, indentation hardness, and rebound hardness. Hardness is dependent on ductility, elastic stiffness, plasticity, strain, strength, toughness, viscoelasticity, and viscosity. Common examples of hard matter are ceramics, concrete, certain metals, and super hard materials, which can be contrasted with soft matter.
Which of the following statements is true? The shape of DNA is a triple helix. DNA mutations never affect an entire chromosome. Mutations in egg and sperm cells are inherited by offspring. Reginald Punnett discovered patterns of inheritance during pea plant experiments.
Answer:
Reginald Punnet discovered patterns of inheritance during pea plant experiments
Explanation:
is there more than one right answer
✅ Reginald Punnett discovered the theory of incomplete dominance during flower experiments. ~ ₕₒₚₑ ₜₕᵢₛ ₕₑₗₚₛ! :₎ ♡ ~
Explain how the structure of DNA is important in the synthesis
Answer:
DNA is the primary genetic material contained within your cells and in nearly all organisms. It's used to create proteins during protein synthesis, which is a multi-step process that takes the coded message of DNA and converts it into a usable protein molecule.
Explanation:
Which is a step of the scientific method in environmental science? A. Testing a hypothesis B.Carrying out research C.Collecting ideas from boocks is a step in the scientific method. The step that follows this step involves forming A.a judgment B.a conclusion C .notes .
Answer:
The correct answer is Option B (Carrying out research). The step that follows this step involves forming B.a conclusion
Explanation:
The Natural environment around us is a function of both the living things and the non-living things. So, environmental science is the study of the natural environment around us. This study includes how to tackle environmental problems and further study on how humans could be impacted by the interactions with their environment. The scientific method is a step taken towards ensuring development in a field by bringing new discoveries and challenging existing beliefs through scientific tests and research. Generally, for most scientific methods of many fields, it starts with:
1. Observations
2. Making inquiry which involves asking questions
3. Forming a hypothesis, which means making untested assumptions
4. Conducting an experiment to check the hypothesis
5. Analyze the results
6. Publish the results
The correct answer is Option B (Carrying out research). Because it involves the scientific method highlighted above. The step that follows this step involves forming B.a conclusion
Chromosome structure can be microscopically observed best during
Scientists find the fossilized remains of a fish in the middle rock layers of a research site. They find the fossil of an insect in the lowest rock layers.
What can be concluded from this evidence?
A. the insect lived before the fish
B. the insect lived on the bottom of the ocean that the fish lived in
Match each cloud type with its image.
Cirrus
Cumulus
Stratus
Cumulonimbus
Fog
The name of the clouds with respect to its image are given below:
A ----- Cumulonimbus.B ----- Stratus.C ----- Cirrus.D ----- Fog.E ----- Cumulus. What do you mean by Clouds?Clouds may be defined as an observable mass of particles of crystallized vapor suspended in the atmosphere of a planet or moon.
The major function of the clouds is to prevent yourself from the sun's intense heat during the day while to limiting the extremely cold at night.
Therefore, it is well described above.
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Matter and energy always flow from the
in ecosystems.
A. consumers to the producers
B. heterotrophs to the autotrophs
C. autotrophs to the consumers
Answer: When organisms use organic matter for cellular respiration, ALL the goes back into carbon dioxide, water, and minerals, while ALL the energy leaves the ecosystem as heat. So matter cycles, energy flows through ecosystems. So It is C
Explanation: A. The producers generate food for themselves and others; consumers do not produce anything, instead eating producers, other consumers or both.
B. Autotrophs make food for their own use, but they make enough to support other life as well.Heterotrophs cannot make their own food, so they must eat or absorb it.
So C is correct
Matter and energy always flow from the in ecosystems from autotrophs to the consumer.
What is ecosystem?The energy flow in the ecosystem is one of the important factors that enables the survival of such a huge number of animals. An ecosystem is made up of a network of connections between living and non-living elements.
All of the energy needed by living things is provided by the sun. About 1% of all radiant energy is absorbed by green plants and distributed throughout the ecosystem.
According to the first law of thermodynamics, energy cannot be generated or destroyed. The energy source, in this case solar energy, cannot be created or destroyed. It can only be moved from one system to another, just like a form is moved from one form to another.
Therefore, Matter and energy always flow from the in ecosystems from autotrophs to the consumer.
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Monitoring levels of which two gases would help determine the human
impact on air quality?
A. Methane
B. Water vapor
C. Carbon dioxide
D. Oxygen
Answer:
A. Methane
C. Carbon dioxide
Explanation:
Methane and carbondioxide are the two gases that determine the human impact on air quality because these gases are produced due to human activities. Methane gas is used in homes for cooking and heating purpose while on the other hand, carbondioxide gas is released from burning of fossil fuels in the engine of vehicles and industries for making different products. These two gases greatly affect air quality.
Answer:
a and c your welcome my children
Explanation:
Where are the photoreceptors located inside a human eye?
Explanation:
retina
photoreceptor; rod and cone
Rods and cones are photoreceptive cells located in the retina of the eye.
Which molecule in the equation represents food energy made by plants? A Carbon dioxide B Water C Glucose D Oxygen
Answer: Glucose
Explanation: Photosynthesis is a set of chemical reactions that uses energy from the sun and carbon dioxide to produce sugar and oxygen. The sugar provides plants with energy to grow.