Explain why crops in the Arctic grow larger than normal during the summer months.
Answer: Sunlight.
Explanation:
Crops in the Arctic region grows more in summer season because there is more absorption of sunlight by the leaves and other parts of the body.
More sunlight favors the growth of crops and due to this reason the crops in the summer season grows better than in winters.
Plants requires adequate amount of sunlight for their growth and development and during winters plants do not receive more sunlight.
Describe what is happening in each stage and what each stage looks like:
Prophase
Prometaphase
Metaphase
Anaphase
Telophase
Cytokinesis
Describe the purpose of mitosis.
Answer:
Mitosis is a type of cell division which produces two genetically similar daughter cells. This is involved in the cells of growth of somatic cells in an organism which has to to be produced with the same genetic material. It is also involved in the asexual mode of reproduction as it produces clones with the same genetic material such as in angiosperms.
Mitosis is divided into two phases- karyokinesis and cytokinesis where karyokinesis is divided into 4 stages which can be easily marked as:
Prophase- chromatin condensation, nuclear envelope disappears. Prometaphase- chromatin condenses to form a packaged structure called chromosomes. Metaphase- chromosomes align at the equatorial plate of the cell, chromosomes highly condensed. Anaphase- chromosomes start separating, each chromatid moves towards the opposite pole of the cell. Telophase - cytokinesis begins, nuclear envelope reappears. Cytokinesis- cell division by the appearance of cell furrow in animal cells and cell plate in plant cells.Which of the following describes how blood helps to maintain homeostasis by working with the immune system?
By having white blood cells to attack pathogens
By delivering oxygen to cells so they can divide
By delivering nutrients from food to cells
By carrying waste to the kidneys
Answer:
i just took the test, its A
Explanation:
Describe the mass and surface temperature of the main sequence stars.
Answer:
Mass of main sequence star - 10 to 200 times of mass of sun
Temperature of main sequence star - 15-18 million kelvin
Explanation:
Majority of stars in the universe are main sequence stars. These stars consists of helium in their cores. Mass of main sequence stars can be as low as one tenth of mass of sun and can be as high as 150 to 200 times the mass of sun. The age of a star depends on its mass. Thus more massive a star is more is its life. The temperature of star is high enough to fuse the hydrogen with in them to form helium atom. Their temperature can be as high as 15-18 million kelvin.
Which statements accurately describe matter? Check all that apply. Only living things are made up of matter. Matter is made up of tiny particles called atoms. Atoms were discovered in the twenty-first century. Atoms cannot be divided. A single atom can be seen only with a standard microscope.
The right options are;
Matter is made up of tiny particles called atoms, and atoms cannot be divided.
A matter is any object that has mass and occupies space (volume). All matter are made up of tiny particles known as atoms. Atoms are composed of interacting subatomic particles which are; electrons, protons, and neutrons. Matter exists in various states such as solid, liquid, and gas.
Answer:
Matter is made up of tiny particles called atoms.
Atoms cannot be divided.
Matter is defined as anything that has mass and occupies space which could be a plant or animal.
Matter is however made up of smaller/tiny particles called Atom. Matter was discovered in the seventeenth century and not in the twenty first century.
Atom however cannot be divided into smaller parts and is regarded as the smallest unit of matter although it contains some sub-atomic particles such as proton and neutron.
It can however be viewed only with an electron microscope as it is too small to be viewed by a light or standard microscope.
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4). A particular bird species found in North America obtains most of its food energy by catching and eating insects. A mutation arises in this bird population that increases the length of its beak. Although many mutations are harmful, this particular mutation has increased the ability of the bird to catch and eat certain insects. Which of these is the MOST LIKELY outcome of this mutation?
A) The insects that are eaten by this bird are likely to become extinct.
B) Sharp pointed beaks will result in the birds eating other more unusual food items.
C) Other bird species will be more likely to also develop pointed beaks in order to compete.
D) Individual birds with the mutation will be more likely to survive and reproduce than birds without the mutation.
5). In 1831, Charles Darwin visited the Galapagos Islands. While observing the giant land tortoises that lived on these islands, Darwin noted that the shape of the tortoise shell varied depending on which island the tortoise lived. Tortoises on one island had round shells, for example, whereas tortoises on a neighboring island had more flattened, saddle-shaped shells. Which statement BEST summarizes Darwin's explanation for these differences?
A) Random mutations caused the shape of the shells to fluctuate periodically.
B) The shape of the tortoise shell varied because the predators on the islands were all similar.
C) The particular shape of the shell was best suited for the island on which the tortoise was living.
D) Tortoises who used their shells in special ways caused the shells to become larger, rounder, or flatter.
The most likely outcome of this mutation is that other bird species will be more likely to also develop pointed beaks in order to compete. Thus, the correct option for this question is C.
The statement best summarizes Darwin's explanation for these differences is that the tortoises that used their shells in special ways caused the shells to become larger, rounder, or flatter. Thus, the correct option for this question is D.
What is Mutation?A Mutation may be defined as the sudden, stable, and inheritable changes in the genetic material of an organism due to the significant impact of mutagens.
When a particular bird species increases the length of its beak due to mutation, other bird species of this region also require to increase their beak's length in order to compete better for their resources and reduce the chances of extinction.
According to Darwin, the differences in the shells of the tortoises arise due to the utilization of their shells in special ways. This facilitates the shells to become larger, rounder, or flatter.
Therefore, both questions are well described above one by one.
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During which process is mRNA converted into a sequence of amino acids for protein production?
The process wherein mRNA is translated into a protein is known as translation, a critical phase of protein synthesis occurring in the cytoplasm where ribosomes synthesize polypeptide chains that fold into functional proteins.
Explanation:The process in which mRNA is converted into a sequence of amino acids for protein production is known as translation. During translation, the cellular machinery interprets the nucleotide sequence of mRNA to produce a chain of amino acids, which then fold into functional proteins. Translation occurs in the cytoplasm, where the ribosomes facilitate the assembly of amino acids into polypeptides.
The mechanism of translation involves several key steps:
The activation of amino acids, preparing them for incorporation into the protein chain.tRNA molecules match specific amino acids to corresponding codons on the mRNA template.As tRNAs bring amino acids to the ribosome, the ribosome catalyzes the formation of peptide bonds between amino acids, elongating the polypeptide chain.The ribosome moves along the mRNA strand, synthesizing the protein until it reaches a stop codon, which signals the end of the translation process.Finally, the newly synthesized polypeptide chain folds into its functional three-dimensional structure.Each codon, a triplet of nucleotides within the mRNA, specifies a particular amino acid. The genetic code underpinning this process is nearly universal across all life forms, reflecting the fundamental role of proteins in biology.
6. Which of these BEST describes our current understanding about how species evolve over time?
A) As organisms use certain traits more frequently, each organism evolves over time.
B) Populations of organisms evolve rapidly due to genetic changes brought about by random mating patterns.
C) Traits that result in a greater number of mutations occur more frequently, causing the population to evolve.
D) Populations evolve as natural selection results in a change in the frequency of alleles within the population over time.
7) A change in a sequence of DNA bases in a bacterial cell has resulted in a mutation. This mutation has increased the ability of the bacteria to break down and digest organic molecules in the environment. Bacteria with this mutation are better able to find and utilize food sources. According to the theory of natural selection, what is MOST likely to occur in future generations of this bacteria?
A) The relative frequency of the mutation will increase as time passes.
B) Because the mutation has changed the DNA of the bacteria, a new species will be formed.
C) Because the mutation is abnormal, the mutation will become more rare with every passing generation.
D) Bacteria with the mutation will increase in number until the food supply is exhausted, causing the bacteria to become extinct.
How do the main sequence stages of these two sizes of stars differ?
Explanation:
Even apart from how bright they appear, which is affected by how far they are from us, stars come in a tremendous range of sizes. So stars aren't all the same mass because the clouds from which they condense are not all the same mass.
The main sequence stages of these two sizes of stars differ in their actual distance from the surface of the earth and their ability to condense the mass of the clouds.
How the brightness of a star is determined?The brightness of a star is determined by the fact that the distance from the earth. If you take a star and move it twice as far away, it would definitely appear 1/4 as bright. The larger the star is, the more energy is put out in order to liberate its brightness.
The sizes of the stars may vary a lot. This means that they have different distances and brightness from the earth. So, all stars do not occupy the same mass. This is because the clouds from which they condense or are covered may not possess not the same mass.
Therefore, the main sequence stages of these two sizes of stars differ in their actual distance from the surface of the earth and their ability to condense the mass of the clouds.
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A gene is a region of DNA that contains instructions for the manufacture of?
Colliding air masses can form a weather front. Which of the following is not a type of front:
2 points
A Stationary Front
B Storm Front
C Cold Front
D Occluded Front
Which of the following was determined by Charles Darwin but based on contributions from another scientist
A. Species can go extinct during catastrophes
B. Species could go extinct when their environment changed if they could not adapt to the change
C. The population can increase faster than the food supply
D. The processes that change organisms work quickly and have only been around for a short time
The correct answer is option B, that is, Species could go extinct when their environment changed if they could not adapt to the change.
According to Darwin and some of the other scientists who studied the concept of evolution, extinction is usually a result of a change in environmental conditions. When conditions modify, some of the species exhibit adaptations, which permit them to reproduce and survive, while others do not.
If the environment modifies gradually, then the species at certain occasions will develop the essential adaptations, with various generations. If conditions modify more briskly than a species can develop, however, and if the individuals of that species are devoid of the trait, which is required to thrive in the novel surrounding, the probable outcome will be extinction.
Some traits, such as earlobe attachment, blood type, and the presence or absence of dimples, have limited variation throughout the human population because they are controlled by a single gene. Other traits, such as skin color and human height, are widely variable throughout the human population because
They are controlled by more than one gene
Answer:
The correct answer would be "they are polygenic traits".
Polygenic traits are those which are controlled by at least two different genes.
As more than two genes are involved in controlling a single trait, so they show more variations as compared to the traits which are controlled by a single gene.
For example, height is controlled by at least three genes and thus six alleles are involved in regulating height.
Polygenic traits often show a bell-shaped curve in a population.
Which of the following best describes our MRNA is produced?
Answer:
DNA provides a template for RNA polymerase.
Explanation:
A liver cell must create a protein to carry fats through the body. Where would the instructions be found?
A) Brain
B) Nucleus
C) Hormone
D) Enzyme
B) Nucleus its B@@@@@@@@@@@
Name 5 things our atmosphere does for us
What is the difference between the revolution and rotation of the Earth and the revolution and rotation of moon
Organisms belonging to the Kingdom Eubacteria, Kingdom Archaebacteria, and some organisms in the Kingdom Protista are unicellular. What is it that places them into different kingdoms?
can you list six physical properties
and 2 chemical properties of this picture Hurryy!!
HELP ME ASAP!!!!!!!!
Assignment: Using Punnett Squares Exploration
First Cross
Genotypic ratio:
Phenotypic ratio:
Second Cross
Genotypic ratio:
Phenotypic ratio:
Third Cross
Genotypic ratio:
Phenotypic ratio:
Questions
1. What conclusions can you draw about the results of your first cross between a homozygous red bull (RR) and a heterozygous red cow (Rr)?
2. What conclusions can you draw about the results of your second cross between a heterozygous red bull (Rr) and a heterozygous red cow (Rr)?
3. What conclusions can you draw about the results of your third cross between a homozygous white bull (rr) and a homozygous white cow (rr)?
Answer:
a)
R R
R RR RR
r Rr Rr
Genotypic ratio: RR : Rr = 2 : 2 = 1: 1
Phenotypic ratio: homozygous red bull (RR) : heterozygous red cow (Rr) = 2:2 = 1: 1
b)
R r
R RR Rr
r Rr rr
Genotypic ratio: RR : Rr:rr = 1:2:1
Phenotypic ratio: homozygous red bull (RR) : heterozygous red cow (Rr) : homozygous white bull (rr) = 1: 2: 1
c)
Xr Yr
Xr Xr Xr Xr Yr
Xr Xr Xr Xr Yr
Genotypic ratio: Xr Xr: Xr Yr = 2: 2 = 1: 1
Phenotypic ratio: homozygous white cow (Xr Yr) : heterozygous white bull (Xr Yr) = 2: 2 = 1: 1
Explanation:
a)
First cross is between a a homozygous red bull (RR) and a heterozygous red cow (Rr)
This shows that "Red" color is a dominant trait
So the cross between Rr and RR is
R R
R RR RR
r Rr Rr
Genotypic ratio: RR : Rr = 2 : 2 = 1: 1
Phenotypic ratio: homozygous red bull (RR) : heterozygous red cow (Rr) = 2:2 = 1: 1
b)
Cross between a heterozygous red bull (Rr) and a heterozygous red cow (Rr)
R r
R RR Rr
r Rr rr
Genotypic ratio: RR : Rr:rr = 1:2:1
Phenotypic ratio: homozygous red bull (RR) : heterozygous red cow (Rr) : homozygous white bull (rr) = 1: 2: 1
c)
Cross between a homozygous white bull (rr) and a homozygous white cow (rr)
Xr Yr
Xr Xr Xr Xr Yr
Xr Xr Xr Xr Yr
Genotypic ratio: Xr Xr: Xr Yr = 2: 2 = 1: 1
Phenotypic ratio: homozygous white cow (Xr Yr) : heterozygous white bull (Xr Yr) = 2: 2 = 1: 1
1. In pea plants, purple flower color is dominant to white flower color. If a homozygous dominant flower mates with a white flower, what is the chance of having white flowered offspring?
Four groups of mice consume different amounts of sweetener in their food. The control group is the one that receives ____.
Write a series of paragraphs that shows your knowledge of the following: the biochemical structure of DNA, how DNA replicates, how the DNA structure forms the genetic code, and how that genetic code comes to be expressed as a phenotype.
The germ theory of disease states that many diseases are caused by the presence and action of specific
Answer:
Microorganisms
Explanation:
after being vaccinated, many children are treated for fever. this is not considered a danger or harm. why might this happen?
Farmers in areas where there are no major rivers still require water for their crops. Where do these farmers most likely obtain the water needed for their crops? Question 11 options: 1) nearby oceans 2) melting ice 3) morning dew 4) underground sources
Commercial fishing in certain parts of the ocean decreases the number of small fish. As a result, large fish and sharks...
are negatively affected because there is less oxygen in the water.
are positively affected because the small fish polluted the water.
are negatively affected because they feed on the small fish.
are positively affected because there is more space.
HELP PLEASE!!!!!!
In the United States, less than 0.8% of the population has type I diabetes. Which of the following facts supports the theory that a person's risk of developing diabetes has a genetic, inherited component?
A. If one parent has type I diabetes, each child's chance of developing diabetes is between 1% and 6%.
B. If one identical twin has diabetes, the other twin has a 50-75% chance of having diabetes.
C. If both parents have type I diabetes, each child's chance of developing diabetes is between 10% and 25%.
D. all of these
xplain how the study of taxonomy helps other scientists.
Using the periodic table and your knowledge of atomic structure. Compare the number of electrons in a Carbon-12 and Carbon-14 isotope.
The difference between Carbon-12 and Carbon-14 is that Carbon-12 has 6 electrons and Carbon-14 has 8 electrons.