Answer:
Explanation:
Cells divide and reproduce in two ways, mitosis and meiosis.
Mitosis results in two identical daughter cells, whereas meiosis results in four cells.
Keys differences and similarities between the two types of cell division.
Mitosis Meiosis
cells created: two daughter cells four daughter cells
Ploidy Creates diploid daughter cells Creates haploid daughter cells
Genetics Daughter cells are Daughter cells are . . genetically identical genetically different
Why is there a meiosis II but not mitosis II?
Meiosis II is generally regarded as being very similar to mitosis, except for the presence of two parent cells, instead of only one. In both meiosis I and II, cytokinesis occurs, and there are two daughter cells per parent cell.
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Which event signals the birth of a star?
A core shrinks and explodes in a supernova.
A protostar collapses, becoming dense and hot.
Extreme heat and pressure causes nuclear fusion.
A mass of gas and dust grows and forms a protostar.
Mark this and return
Hydrogen and helium atoms fuse together to generate stars. The heat produced by this process releases a lot of energy. Four hydrogen atoms and one helium atom are fused together in this procedure. Thus, the correct option is C.
What is helium?Hydrogen and helium atoms fuse together to generate stars. The heat produced by this process releases a lot of energy. Four hydrogen atoms and one helium atom are fused together in this procedure. The nuclear fusion processes are caused by the external heat, pressure, and gravitational force. The pressure produced by the heat allows the helium atom to fuse with carbon. These fusions are required to give the star its form.
The nuclear fusion processes are caused by the external heat, pressure, and gravitational force. The pressure produced by the heat allows the helium atom to fuse with carbon. These fusions are required to give the star its form.
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Which of the following form(s) zygote (2n)?
Sperm + Ovum
n + n
Male gamete + Female gamete
All of the choices
Answer:
All of the choices
Explanation:
The n stands for 23 chromosomes, every cell has 46 chromosomes so 2n.
Male and female gametes have just n (23 chromosomes)
n + n = 2n
sperm and ovum are synonyms for the gametes
Science question! help…….
Original Question: Some plants have red leaves instead of green leaves. Which of the statement about the production of food through photosynthesis in such plants is most likely true?
Answer: (J) The chlorophyll necessary for photosynthesis is present but hidden by red pigment.
Explanation: Every plant has chlorophyll to help with the production of food through photosynthesis.
For plants with red leaves or any other color but green, the pigment simply acts as a 'sunscreen to the plant', who perhaps doesn't require so much sunlight in its photosynthesis.
Hope that helps!
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A blood alcohol concentration of. 08 indicates that _____ percent of your blood is alcohol.
A blood alcohol concentration of. 08 indicates that 0.08% of your blood is alcohol.
Any driver who's stopped by a law enforcement officer and found to have a breath or blood alcohol level of .08 or higher will, at the time of the arrest?Any driver who's stopped by a law enforcement officer and found to have a breath or blood alcohol level of .08 or higher will, at the time of the arrest will have their driving privilege suspended. Depending on what occurs, the suspension will change from shorter to longer, and vice versa.
Thus, 0.08% of your blood is alcohol.
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which of the following was a social cost associated with the devolpment of the internal combustion engine used in most cars?
Option:
A. People were able to use their horses for new tasks.
B. New jobs were created.
C. Blacksmiths needed to gain new skills to continue working.
D. Families were able to travel farther more easily.
Answer:
Blacksmiths needed to gain new skills to continue working. Thus, the correct option is C.
What engineer Nikolaus August Otto developed?Engineer Nikolaus August Otto developed the first four-stroke internal combustion engine and established the Otto cycle, a well-known theoretical cycle that governs the operation of explosive engines.
Otto's engine outperformed the steam engine in use at the time in a number of ways. One of them is their light weight, as steam engines need large water reservoirs and fuel to burn in order to heat the water, which in this case would be charcoal or firewood. In addition to being light, the internal combustion engine consumed little fuel, even benzene. Another factor was Otto cycle internal combustion engines' power, which also outperformed steam engines in terms of size ratio.
These benefits put pressure on the automotive sector to build vehicles with this kind of technology. Blacksmiths were compelled to learn new skills in order to use this new technology.
In addition to being light, the internal combustion engine consumed little fuel, even benzene. Another reason was Otto cycle internal combustion engines' power, which also outperformed steam engines in terms of size ratio.
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How does the intracellular fluid compartment differ from the extracellular fluid compartment?.
One way in which photosynthesis would be affected if all the air spaces in the leaf were filled with cells
Carbon dioxide must flow from the air spaces into the leaf for photosynthesis to take place. By diffusing via tiny pores called stomata, it achieves this.
How gaseous exchange is affected if cells are filled in the air spaces.
Cells called stomata are found on the epidermis, or skin, of an above-ground plant. These cells allow water and oxygen to enter the plant while also allowing carbon dioxide to depart. The process through which plants absorb carbon dioxide and exhale oxygen as waste is known as photosynthesis. Intake of carbon dioxide reacts with water in the presence of sunlight to produce glucose and other molecules that are high in energy.If, air spaces are filled with the cells no exchange of gases takes place which does not allow plants to produce energy-rich compound glucose.To learn more about the photosynthesis, you can refer to-
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The diffusion of water across a selectively permeable membrane is
homeostasis
homeostasis
endocytosis
endocytosis
osmosis
osmosis
passive transport
Which is the result of a seasonal change?
A. Trees dying from air pollution
B. A bear hibernating
C. A bat capturing mosquitoes
D. Average temperatures rising each year
Answer:
B. A bear hibernating
Explanation:
The other options are not specific to seasons, but bears consistently hibernate annually in the winter.
Dihybrid crosses
1. In man, assume that spotted skin (S) is dominant over non-spotted skin (S) and that wooly hair (W) is dominant over non-wooly hair (W). cross a marriage between a heterozygous spotted, non-wooly man with heterozygous wooly-haired, non-spotted woman. Give genotypic and phenotypic ratios of offspring?
Explanation:
The phenotypes and genotypes of the progeny can be determined by a dihybrid cross of the parents.
The heterozygous male will have the genotype 'SSww' and the heterozygous female will have the genotype 'ssWW'.
When crossed, the F1 offsprings will have a hybrid genotype of 'SsWw'. These offsprings are heterozygous with spotted skin and wooly hair.
On self-crossing of the F1 hybrids, we find four different combinations of the alleles- SW, Sw, SW and sw. The probability of getting each of these combinations is 1/4.
Hence, the probability of any dihybrid type is 1 out of the 16 possible genotypes. Using Punnet square, we find
9 SSWW: 3 SSww: 3 ssWW : 1 ssww
This is the phenotypic ratio of the offsprings.
The ratio of the possible genotypes will be 1:2:1:2:4:2:1:2:1.
heyy
please help me with these answers
theyre quite simple but i dont really know how to explain the answers
1. Tulips are pollinated by insects. explain three ways the flower is adapted for this type of pollination
2. explain the differences in the types of pollen produced by insect-pollinated amd wind-pollinated plants.
thankss
1. Bees, flies, wasps, butterflies, and moths are significant insect pollinators. Moths are drawn to white flowers that are open at night, but bees and butterflies are drawn to brilliantly colored blooms with powerful scents that are open during the day.
What is pollination?The act of moving pollen grains from an anther to a flower's stigma is called pollination. Flowers that are pollinated by insects typically generate a sweet nectar that the insects visit to consume. If a flower is self-pollinating, fertilization occurs when pollen stock from an insect contacts the stigma of the bloom. If the bug is bisexual, it will fly to another bloom and disperse the pollen.
2. Most flowers advertise themselves by being brightly colored and perched on long stems so they wave in the air and are closer to where insects are flying, as opposed to on the ground, where they would otherwise be. A flower's petal sizes and shapes, in addition to color, can draw insects.
3. Flowers draw insects because of their aroma or vibrantly colored petals. Nectar is a delicious liquid that many flowers generate that is consumed by insects. The female part of the flower is the carpel.
Answer 2. Flowers that are pollinated by insects have characteristics that enable insects, birds, or other animals to pollinate them while consuming the nectar. When an insect brushes by the stigma of a flower, whether it is the same bloom or another, pollen grains will adhere to the insect's outer layer and stick to the flower's stigma, pollinating the flower. When the two seˣ cells combine, fertilization occurs, the ovule develops into a seed, and the ovary becomes a fruit. The pollen grain then grows a pollen tube down the style to reach the ovary, which contains the ovules.
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Which statement describes the work of Aristotle and Linnaeus?
Aristotle’s classification system had many levels, while Linnaeus’s classification system only had two levels.
Aristotle’s and Linnaeus’s classification systems both divided all life into two groups: plant and animal.
Linnaeus proved that many organisms, which were classified as plants by Aristotle, were animals.
Aristotle and Linnaeus worked side by side examining organisms on many trips.
The correct description is:
Aristotle’s and Linnaeus’s classification systems both divided all life into two groups: plant and animal: option B.
What was the work of Aristotle and Linnaeus centered on?Aristotle was a Greek philosopher who studied life and living things to be able to explain their behavior.
Linnaeus was a Biologist who studied and classified living things into plants and animals.
Aristotle and Linnaeus both classified living things into plants and animals.
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Is the activity of altering the existing business processes and desgining new ones to take advantage of new information systems
Business process management can be described as the activity of altering the existing business processes and desgining new ones to take advantage of new information systems.
What is Business process management?Business process management is the process of resigning new business process as well as modifying existing processes in order to leverage new information systems available for businesses.
Therefore, business process management can be described as the activity of altering the existing business processes and desgining new ones to take advantage of new information systems.
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Rainforests are not exclusively found near the equator.
Please select the best answer from the choices provided
T
Or
F
importance of potassium in plants (any 4 points)
1. Increases root growth and improves drought tolerance.
2. Builds cellulose and reduces lodging.
3. Activates at least 60 enzymes involved in growth.
4. Helps translocate sugars and starches.
5. Produces grains rich in starch.
6.Increases protein content of plants.
Chromosomes contain different amounts of:
Answer:
DNA srry if im wrong
Explanation:
Answer:
DNA
Explanation:
A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.
What controls differentiation? Choose the correct answer .
Gene expression controls differentiation of cells. Details about differentiation can be found below.
What is cell differentiation?Cell differentiation is a cellular process in which the cells of multicellular organisms advance in organization and acquire special organs for specific purposes.
Cell differentiation is what forms specific cells that are adapted to specific roles in multicellular organisms.
However, this process of differentiation is as a result of the expression of genes at different times, since, all cells of an organism contains the same genes.
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Microbial control methods usually target any of the following cellular components except which one?.
Microbial control methods usually target any of the following cellular components except the mitochondria. option D
What are microbial control methods?Microbial control methods are methods aimed at the causation of ineffectiveness of microorganisms.
They could be physical or chemical methods.
Some microbial control methods include high or low temperature, drying, osmotic pressure, filtration, radiation, etc.
These methods target cell components that are not found in humans.
Therefore, microbial control methods usually target any of the following cellular components except the mitochondria
The options are
a. plasma membrane permeability
b. nucleic acids
c. microbial proteins
d. mitochondria
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What embyonic germ layer gives rise to muscle?
The mesoderm is one of the embryonic layers together with the ectoderm and endoderm. The germ layer that gives rise to muscle is the mesoderm.
What is the mesoderm?Three embryonic layers are present in the blastoderm after segmentation. One of them is the mesoderm, which is located between the ectoderm and the endoderm.
Different tissues and cells are formed from the mesoderm, such as muscular, skeletal, circulatory, and connective tissues.
The correct anwer is mesoderm. The embyonic germ layer that gives rise to muscle is the mesoderm.
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How did the Lumber industry contribute to the pollution in Sudbury (Located in Canada)
As of now Sudbury has some of the cleanest air in all of Ontario. That’s hard to believe given the city once emitted 2.5 million tonnes of sulfur dioxide per year due to the Lumber industry. In the 1980s, the “Sudbury” became known as a unit of pollution, against which other industrial cities were measured. It’s now become known as a unit of restoration.
which statement about the elongation phase of protein synthesis is true?
The statement that is true about elongation phase of protein synthesis is that Peptidyl transferase is a ribozyme.
What is Protein synthesis?Protein synthesis is defined as the process biological systems use to produce new molecules of proteins.
Peptidyl transferase is a type of enzyme called ribozyme which is responsible for peptide bond formation during protein synthesis.
Therefore, the statement that is true about elongation phase of protein synthesis is that Peptidyl transferase is a ribozyme.
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Mention four benefits of rearing the farm animal mentioned in a(i)..-
What is the most appropriate system of keeping the farm animal:....
The four benefits of rearing the farm animal mentioned area the Good pleasant and amount of milk that may be produced and it could upload to the earnings of the farmer.
What types of animal systems are there?According to FAO, there are 3 predominant farm animal control systems: combined manufacturing. in-depth farming systems “landless” enormous manufacturing gadget.
A farming gadget is described as a complicated interrelated matrix of soil, plants , animals, implements, power, labor, capital and different inputs managed in component through farming households and encouraged to various stages through political, economic, institutional and social forces that perform at many levels (Dixon et al., 2001).Benefits of farm animals farming: 1) Good pleasant and amount of milk may be produced and it could upload to the earnings of the farmer. 2) Draught labor animals may be produced and utilized in agricultural work. 3) New range which can be proof against illnesses may be produced through crossing types with the preferred traits.Read more about the farm :
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Which of the following are true of a species? Select all that apply.
1 of 4 QUESTIONS
All fertile individuals can breed with one another.
Individuals vary genetically.
There is no natural selection occurring.
There is gene flow between populations.
Answer:
the 1rst and 2nd
Explanation:
all fertile individuals can breed with one another and individuals vary genetically
to aThe development of the cell theory is directly related to advances in microscope technology why are these two related?
The study of the cell theory required the use of more sophisticated microscopes hence development of the cell theory is directly related to advances in microscope technology.
What is cell theory?The cell theory portrays the idea that a cell is the smallest unit of an organism. Cells are so small that they can nit be seen with the ordinary optical eyes. As such, the eyes must be aided by a device such as a microscope to make the study of the cells possible.
From the time of Robert Hooke when the cell theory began to take more shape, the complex microscope was discovered. As time went on, the cell theory was advanced and more sophisticated microscopes had to be produced.
Thus, development of the cell theory is directly related to advances in microscope technology.
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Fossil fuels represent Group of answer choices a large amount of paleozoic and mesozoic biomass buried anaerobically millions of years ago. natural deposits of organic materials that formed long before life on Earth evolved. the remains of fossil animals that lived a few thousand years ago. sustainable sources of energy that are underused today.
Fossil fuels represent the remains of fossil animals that lived a few thousand years ago.
How fossil fuel are formed?Fossil fuels are formed from decomposition of plants and animals dead bodies. These fuels are found in the Earth's crust. It contain carbon and hydrogen, which can be burned for energy.
So we can conclude that Fossil fuels represent the remains of fossil animals that lived a few thousand years ago.
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Dihybrid crosses Black coat color is dominant over white coat color in guinea pigs. in addition to coat color, rough coat is dominant over smooth coat. a. in a punnett square, demonstrate a cross between a homozygous black/homozygous rough with homozygous white/homozygous smooth. Describe the genotype and phenotype as fractions
an individual's set of observable characteristics that results from the interaction of a genotype with the environment
check me if I'm rong
Acid precipitation can dissolve aluminum from soil. As aluminum is dissolved, it can flow into lakes and contaminate the water. High concentrations of aluminum in
lakes is fatal to many forms of aquatic life. This scenario provides evidence for which of theseconcepts?
A. Environmental change always has a negative impact on organisms.
B. Acid rain is the most important environmental problem to address.
C. Acid rain is the leading cause of death to fish in lakes.
D. Environmental change can impact the quality of life for living organisms.
The scenario described provides evidence for option D: Environmental change can impact the quality of life for living organisms.
The passage explains how acid precipitation, commonly known as acid rain, can dissolve aluminum from soil. This dissolved aluminum can then flow into lakes, resulting in contamination of the water.
High concentrations of aluminum in lakes can be fatal to many forms of aquatic life. This evidence supports the concept that environmental change can have a detrimental impact on living organisms.
Option A is incorrect because the passage does not suggest that environmental change always has a negative impact on organisms. While the scenario highlights a negative consequence of acid rain on aquatic life, it does not generalize this impact to all environmental changes.
Option B is also incorrect because the passage does not claim that acid rain is the most important environmental problem to address. It solely focuses on the specific issue of aluminum contamination in lakes due to acid rain.
Option C is incorrect because the passage does not state that acid rain is the leading cause of death to fish in lakes. It highlights the detrimental effect of high aluminum concentrations, but it does not compare it to other potential causes of fish death in lakes.
Therefore, the most appropriate concept supported by the scenario is option D, which acknowledges that environmental change can impact the quality of life for living organisms based on the example of aluminum contamination in lakes due to acid precipitation.
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A ligamentous connection such as an antebrachial interosseous membrane is called a.
A ligamentous connection such as an antebrachial interosseous membrane is called a syndesmosis.
A fibrous joint called the syndesmosis is held together by ligaments. It is situated between the distal fibula, or outside leg bone, and the tibia, or shinbone, close to the ankle joint. It is also known as the distal tibiofibular syndesmosis for this reason.
syndesmosis is made up of a number of ligaments. The top three are:
Tibiofibular anterior inferior ligamentTibiofibular posterior inferior ligamentArticular cartilage ligamentTibiofibular transverse ligamentThe syndesmosis ligament supports and stabilizes your ankle by acting as a shock absorber. Its primary function is to keep the tibia and fibula in line and from extending outward too much.
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Explain how activation energy is related to exothermic and endothermic reactions.
Activation energy is related to exothermic and endothermic reactions because in exothermic reaction activation energy is lower than in endothermic reactions.
What is an activation energy?Activation energy is defined as the energy that must be overcome for a chemical reaction to take place.
A chemical reaction can either be exothermic or endothermic reactions.
This activation energy is related to exothermic reaction because there is net energy release from the reaction while in the endothermic reaction there is net absorption to energy.
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the cause of shin splint is usually due to ____ .
The cause of shin splints is usually (or generally) due to Overuse.
What is a shin splint?A shin splint refers to a health problem associated with pain in the tibia/shin bone.
The tibia bone is very large and its pain is a serious problem, thereby shin splint would be treated immediately.
In conclusion, the cause of shin splints is usually (or generally) due to Overuse.
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