What is the first step in the cell cycle?
Answer:
Prophase
Explanation:
parent chromosomes are condensed into an x shape
Answer:
The cell cycle is a four-stage process in which the cell increases in size (gap 1, or G1, stage), copies its DNA (synthesis, or S, stage), prepares to divide (gap 2, or G2, stage), and divides (mitosis, or M, stage). The stages G1, S, and G2 make up interphase, which accounts for the span between cell divisions.
Explanation:
pa brainlest
Hwo many chromatids does each chromosome have in anaphase of meiosis i
Answer:
two sister chromatids
Explanation:
There are two sister chromatids that each chromosome have in the Anaphase of meiosis I.
What do you mean by Chromatids?Chromatids may be defined as one of the two similar halves of a chromosome that has been duplicated in preparation for cell division.
During Meiosis I, each of the daughter cells is haploid (n) in nature and consists of 23 chromosomes. Each chromosome comprises of 2 sister chromatids.
Therefore, there are two sister chromatids that each chromosome have in the Anaphase of meiosis I.
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Why is it important to continuously monitor seismic data?
Answer:
determining the frequency of occurrence of earthquake activity, evaluating earthquake risk, interpreting the geological and tectonic activity of the area, and providing an effective vehicle for public information and education
Explanation:
I looked it up
15. What is atherosclerosis?
A. the build up of fats and cholesterol in the walls of blood vessels
B. the field in which scientists investigate how many people have a disease
C. a method used to correct arrhythmias
D. another word for high blood pressure
Atherosclerosis refers to the build-up of fats and cholesterol in the walls of blood vessels (Option A).
What is atherosclerosis?Atherosclerosis is a disease characterized by the build-up of fats and cholesterol in the walls of blood vessels.
This build-up of fats narrows the blood vessels, thereby difficulting the movement of blood in the bloodstream.
The symptoms of atherosclerosis include, among others, chest pain, shortness of breath and fatigue.
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Answer:
I hope this helps.
Explanation:
Canopus is 313 light years from Earth. How old is the light that we are currently seeing?
Answer:
313 years old because ye4s im smart a enginner i know how to spoll cause i ahave all as
Explanation:
Which repair process in e. Coli uses visible light to repair thymine dimers?.
Answer:
photoreactivation repair
Explanation:
Photoreactivation utilizes the enzyme photolyase to break the bonds formed during pyrimidine dimerization. A thymine dimer produced by UV irradiation is bound by photolyase. Visible light energy is absorbed by photolyase and is redirected to break the bonds forming the dimer.
In addition to bacteria, this DNA repair mechanism is also found in single-celled eukaryotes, plants, and some animals such as Drosophila.
What is the basic structure of a virus?
DNA or RNA surrounded by a cell wall.
O A capsid surrounded by a protein coat.
A capsid surrounded by an envelope.
DNA or RNA surrounded by a cell membrane
Answer: A capsid surrounded by an envelope.
Explanation:
A community of kelp, a type of seaweed, grows into an undersea forest. Many fish live in the kelp forest. An oil spill occurs and kills many of the fish. What will most likely happen to the kelp forest?.
Answer:
Population will increase
Explanation:
Since the oil spill the fish, the kelp has a reduced number of natural predators
Severe flooding in an area caused a population of minnows to become split into two separate ponds. Prior to the separation, the male minnows all had a moderate number of spots.
Following the separation, the first pond was filled with larger fish that fed on minnows, so male minnows with fewer spots were better able to avoid detection by predators. The minnows in the second pond, however, had very few predators, and female minnows in this pond preferred to mate with males that had the most spots.
After many generations, the two minnow populations evolved into different species and could no longer interbreed.
Fish Species Average # of Spots
Original Species four to six
New Species 1 zero to two
New Species 2 eight to ten
Which of the following best describes why the two minnow populations evolved into separate species?
A.
Natural selection acted upon the traits of the minnows in the first pond only, causing these fish to evolve into a new species with new adaptations.
B.
Natural selection acted upon the traits of the minnows in the second pond only, causing these fish to evolve into a new species with new adaptations.
C.
The same selective pressures were acting upon both populations, leading to a decrease in genetic variation and the formation of two new species.
D.
Different selective pressures were acting upon the two populations, leading to an increase in genetic variation and the formation of two new species.
please what is meant by photosynthesis
Answer:
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Some of this chemical energy is stored in carbohydrate molecules, such as sugars and starches, which are synthesized from carbon dioxide and water, In most cases, oxygen is also released as a waste product that stores three times more chemical energy than the carbohydrates. Most plants, algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies most of the energy necessary for life on Earth.
Explanation:
Use the drop-down menus to identify which bacterial shape applies. a (rod-shaped) b (spiral-shaped) c (spherical)
The identity of the bacterial shape is the following:
a (rod-shaped)- bacillus.
b (spiral-shaped)- spirillum.
c (spherical)- coccus.
What are bacteria?Bacteria are single-celled microorganisms found as free-living or parasites.
They are found in many shapes and sizes.
There are good bacteria that help humans and other animals, and bad bacteria are harmful to the animals.
Thus, the shape of the bacteria area (rod-shaped)- bacillus., b (spiral-shaped)- spirillum., c (spherical)- coccus.
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Answer✔ Bacillus
A (rod-shaped)
✔ Spirillum
B (spiral-shaped)
✔ coccus
C (spherical)
Explanation:
Why have scientist devised a system of comparative weights for atoms rather than using actual weights
Answer:
Because of multiple reasons:
Explanation:
Atoms are way too small to weigh.They couldn't use weight, they would have to use mass.Some atoms are free-floating, because they are the air.If they even made a scale that measured each atom, it would also catch the air atoms as well, unless they had a vacuum chamber, but even then, no one can make a perfect vacuum, space is not even a perfect vacuum...Hope this helps.
Which of the following is an example of nonpoint source pollution? A) A leaking gas line B) industrial discharge C)storm water runoff D)an oil spill
Answer:
c.
Explanation:
they all are correct but c is he best answer
Answer:
just as the name implies. Storm does not have any specific place it coming from
What is the genotype of the parents if allele b is dominant over allele b?.
The dominant characteristic will be phenotypically manifested in offspring whose genotype could be BB or Bb.
What is genotype?An organism's genotype is made up of all of its genetic components. The alleles or variations that an individual possesses in a certain gene or genetic region are also referred to as the genotype.
The amount of copies of the each chromosome contained in that species, commonly known as ploidy, determines how many alleles a person can have for a certain gene. In diploid organisms like humans, there are two complete sets of chromosomes, which means that each person possesses two alleles for each gene. The dominant characteristic will be phenotypically manifested in offspring whose genotype could be BB or Bb.
Therefore, the dominant characteristic will be phenotypically manifested in offspring whose genotype could be BB or Bb.
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Both plant and animal cells as well as many unicellular organisms contain
Answer:
Both plant and animal cells as well as many unicellular organisms, contain a mitochondria and nucleus which supply energy for a cell .
Explanation:
Cell is the basic functional and structural unit of life. Plant, animal as well as many unicellular organisms contain cell organelles and mitochondria which supply energy to cells.
What are different cell organelles?Cell organelles are the structures inside a cell that floats inside the cytoplasm.
Any cell that is living has cell organelles.
Cell organelles are as follows:
Mitochondria: form ATP and provides energy to the cell.Nucleus: Brain of the cell.Ribosome: helps in protein synthesis.Endoplasmic reticulum: It helps in the transport of substances.Golgi bodies: involves in packaging.Lysosome: involved in digestion of cell.Thus, Both plant and animal cells as well as many unicellular organisms contain organelles and mitochondria that provides energy to the cell.
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3.) Is the trait shown recessive or dominant?
Answer:
top two are recessive if not shaded
Explanation:
bottom one is dominant male
What are similarities of the skull?
Answer:
It can provide a fascinating perspective on how animals are related.
write the difference between
a.Soil formation and Soil erosion
b.Soil pollution and Soil profile
a.
In soil erosion, the soil is carried away from by the wind or water from the top layer of the ground. Soil formation is making soil. It can be by the deposition of the soil from water or wind
Which of the following are examples of habitats where sympatric speciation could occur?
Choose one or more:
A. different locations along the Great Barrier coral reef in Australia
B. opposite sides of a mountain range
C. the North Rim and South Rim of the Grand Canyon
D. an elevational gradient on the south-facing slope of a mountain
E. varying water depths in a lake
The examples of habitats where sympatric speciation could occur include the following:
A. different locations along the Great Barrier coral reef in Australia
D. an elevational gradient on the south-facing slope of a mountain
E. varying water depths in a lake
What is Sympatric speciation?This is defined as the evolution of a new species from a surviving ancestral species while both continue to inhabit the same geographic region.
The options listed above fall within the same geographic region which was why they were chosen as the most appropriate choice.
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There are 3 differences between the two kingdoms of bacteria. Which of the
following is NOT one of those differences?
What the cell wall is made of.
How they reproduce.
DNA differences
Habitats.
Answer:
the DNA differences should be the answer
Why are food webs more realistic than food chains?
look at the attachment please!
Answer:
the correct answer is B
Explanation:
i put it in answer form for others:)
Which of the following relationships is symbiotic?
A group of ants work together to build an underground nest.
A tick latches on to the body of a dog and feeds on the dog's blood.
Abee pollinates a flower while feeding on the flower's nectar.
A remora attaches to the body of a shark and feeds on scraps when the shark eats.
Two male red-winged blackbirds fight over territory.
A male bluebird and a female bluebird provide care for their offspring.
Viruses ___________________________________________________.
are living because they reproduce with help from a host.
are not living because they do not grow.
are not living because they do not respond to stimuli.
are living because they have organelles.
An individual suffers a blood clot in an artery that delivers blood to his leg. The leg begins to take on a blue hue, becomes colder than the rest of his body and he experiences numbness in the leg. He is most likely experiencing.
explain why camouflage and mimicry can increase an organism’s fitness
Camouflage: Structural adaptation that enables an individual to blend with its surroundings, and that allows an individual to avoid detection by predators. … Camouflage and mimicry are both adaptations because they increase the likelihood of an individual evading predation long enough to reproduce.
Sure hope this helps you! :)
P.S my name is Misty
One support of the behavioral perspective is that it is backed by strong and extensive research. please select the best answer from the choices provided t f
The statement one support of the behavioral perspective is that it is backed by strong and extensive research is definitely true.
What do you mean by Behavioral perspective?Behavioral perspective may be defined as the process of all acting throughout life as a result of some form of motivation or incentive.
The behavioral perspective always deals with the behavior of an individual with respect to any stimulus, which may be directly or indirectly associated with that individual.
Therefore, statement one support of the behavioral perspective is that it is backed by strong and extensive research is definitely true.
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A population of insects is sprayed with a new insecticide. Most of the
insects are killed but a few survive. In the next generation, many more of the
insects are unaffected by the insecticide. Which of the following BEST
explains these results?
Answer: This shows that over time, some insects can become "pesticide-resistant" meaning that pesticides don't affect them anymore. And this only happens every few generations. Therefore, each generation is being naturally selected and accumulating variations that make them resist the chemicals. This shows that each cockroach's genes are changing to give them variation from the rest of the population.
I hope this helps!
A specialist who treats the genitourinary system of males is a/an.
What is a
theory?
A. a scientific
explanation for a set of
observations that can
be tested
B. a proven, universal
truth that states what
happens
C. a well-tested
explanation as to why
something occurs that
is generally accepted
D. an assumption
made about an
experiment
Answer:
A. A scientific explanation for a set of observations that can be tested.
Explanation:
Theories can be proven or rejected, just like hypotheses.
Hope this helps!
Your answer is A. a scientific
explanation for a set of
observations that can
be tested
Imagine that this cleared area was made for a farm that grows only one type of crop. What kinds of outcomes might you predict for this new area of low biodiversity?
A forest with a large spot that was cut down.
A forest with a large spot that was cut down will represent a loss of biodiversity that might be irreversible.
What is biodiversity?Biodiversity refers to all genetic and phenotypic diversity that is present in a given ecosystem.
Biodiversity is fundamental for maintaining the internal equilibrium (homeostasis) of the whole ecosystem.
The generation of a short patch in the forest may represent the loss of biodiversity that may be reestablished by the surrounding environment.
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