mitosis is done by your body cells this cartoon illustrates and exception what types of cells do not undergo mitosis
Most cells in the human body reproduce using mitosis, however, sex cells (or gametes) like sperm and egg cells do not. They are produced through a different cell division process called meiosis, which results in cells with half the number of chromosomes, facilitating genetic variation in offspring.
Explanation:In the human body, most cells reproduce using a division process known as mitosis. However, there is one type of cell that does not undergo mitosis: sex cells or gametes. These cells, specifically sperm and egg cells, are formed through a different cell division process called meiosis.
In meiosis, the resulting cells have half the number of chromosomes than the original cell allowing genetic variation in offspring. While in mitosis, the resulting cells are genetically identical to the original cell, maintaining the same number of chromosomes. This is why mitosis is used for growth and repair in the body, and meiosis is used for sexual reproduction.
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What do eukaryotic cells have that prokaryotic cells do not? A.Cell membranes B.DNA C.Cytoplasm D.Membrane-enclosed organelles
Answer:
The answer is D.Membrane-enclosed organelles
Explanation:
Eukaryotic cells have a cytoplasm organized in compartments, with separate or interconnected organelles, limited by biological membranes that have the same nature as the plasma membrane. In the nucleus is the genetic material in the form of chromosomes, where all the necessary information is given so that all the processes both intracellular and outside the cell are carried out.
Eukaryotic cells are more complex than prokaryotic cells and contain various membrane-enclosed organelles, such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and others. The correct answer is D. Membrane-enclosed organelles.
These organelles perform specific functions within the eukaryotic cell. Prokaryotic cells, on the other hand, lack membrane-bound organelles and have a simpler internal structure. They do have cell membranes, DNA, and cytoplasm, which are also present in eukaryotic cells.
Eukaryotic cells have the additional feature of membrane-enclosed organelles, which provide them with compartmentalization and specialization of cellular functions, whereas prokaryotic cells lack these organelles and have a more simplistic internal structure.
Therefore, the correct answer is D. Membrane-enclosed organelles.
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explain the process of mitosis in a tissue culture for normal cells
Answer:
Cell tissue is taken from a living organism.
Cells divide and reproduce in the culture.
Cells continue mitosis until they are touching, then they stop reproducing until a cell dies.
Cells reproduce one layer thick and then stop reproducing.
Cells undergo 20 to 50 mitotic divisions in a tissue culture.
Explanation:
Which best describes the life cycles of moss and angiosperm?
I. Both life cycles have protected seeds.
II. Both life cycles involve meiosis.
III. Moss fertilization occurs in the air; angiosperm fertilization occurs in a pool of water.
IV. Moss release haploid spores into the surrounding environment; angiosperm release haploid pollen grains into the surrounding environment.
Ans. Option (IV).
Mosses can be defined as non-vascular, flowerless plants that are found in shady or damp regions and reproduce via haploid spores. During reproduction in moss, haploid male gametes or spores are released into surrounding environment that fuse with female spores to form zygote that develop into mature sporophyte.
Angiosperms are vascular, flowering plants that reproduce by seeds. During reproduction in angiosperms, haploid male gametes or pollen grains are released into surrounding environment that fuse with female gametes or eggs to form zygote that develop into seed.
Thus, the correct answer is option (IV).
Answer:
D
Explanation:
the gene is located at a specific site on a(n) ______ strand
A. DNA
B. QRS
C. RNA
D. tRNA
A. DNA
;;;;;;;;;;;;;;;;;;;;;;;;;
Fertilization occurs when _____. an organism clones itself two gametes come together and chromosomes combine binary fission takes place gametes are produced
Answer: the correct answer for the fill in the blank is- Gametes come together and chromosomes combine.
Fertilization is a process in which sex cells ( also called male and female gametes that are haploid) are fused together and form zygote ( diploid) that eventually develops into new organism.
There are two types of fertilization that is internal ( inside the body) and external fertilization ( outside the body).
The general formula for a synthesis reaction is what
Answer:
a+b--> ab
Explanation:
a p e x :)
What happens to pyruvate molecules formed in glycosis in the absence of oxygen
An aerobic activity is defined as one that _____ the heart rate and ____ the body's need for oxygen.
increases; decreasesincreases; increasesdecreases; decreasesdecreases; increases
Answer: increase, increase
The term aerobic literally means "with oxygen", and refers to the use of oxygen by muscles for generating energy. An aerobic activity will increase the rate of heat so that it can pump more oxygenated blood because of increase in muscle activity, the need of oxygen of body also increases.
Hence, an aerobic activity is defined as one that increases the heart rate and increases the body's need for oxygen.
How is it possible for an offspring to exhibit a recessive trait if neither parent exhibited that recessive trait? What must be true about the parents’ genes for this to occur?
All scientific ___________ must be based on careful and rational examinations of the facts. hypothesis laws theories inquiries
Answer;
Theories
All scientific theories must be based on careful and rational examinations of the facts.
Explanation;
-A scientific theory is a series of statements about the causal elements for observed phenomena. A critical component of a scientific theory is that it provides explanations and predictions that can be tested.
-A good scientific theory is formed from a number of hypotheses that can be tested independently. It should also consists of a limited number of problem-solving strategies that can be applied to a wide range of scientific circumstances.
What did robert koch discover by using the compound microscope?
Professor Whitney has a sample of lead and a sample of iron. The samples have equal mass. When Whitney heats the samples, the lead reaches a higher temperature than the iron, even though both samples absorbed the same amount of thermal energy. What can Whitney conclude from this experiment?
Iron is a better conductor of heat than lead.
Lead is a better conductor of heat than iron.
Lead has a higher heat capacity than iron.
Iron has a higher heat capacity than lead.
Answer:
The correct answer would be "Iron has a higher heat capacity than lead".
Heat capacity can be defined as the amount of heat transferred required in order to raise the temperature of an object by 1°.
The higher the heat capacity the more the heat transfer is required to raise the temperature.
Iron has higher heat capacity as compared to the lead due to which it requires more heat transfer to raise the temperature of the iron as compared to the lead.
It is why the temperature of the lead increases more as compared to iron even though they absorbed the same amount of thermal energy.
Answer:
The correct answer is "Iron has a higher heat capacity than lead."
Explanation:
Hope this helps.
Q:Suppose the human gene coding for hemoglobin is inserted into a bacterial plasmid. A bacterial culture is transformed with the recombinant plasmid. Which of the following statements will be true?
A.The bacteria will not survive.
B.The bacteria will produce only human hemoglobin.
C.The bacterial will produce human hemoglobin and its own bacterial proteins.
D.The bacteria will produce human hemoglobin and other human proteins.
These are true and false questions and I want to be sure of my answers. Please someone check. Thanks:
The eight-element periodicity found in the Periodic Table is related to the number of electrons in the outermost energy level of the atoms that make up each element. True
2. Electrons in the first energy level of an atom are called valence electrons. False
3. For atoms important to life, if the first energy level is the outermost shell, it is stable with 2 electrons. If any other energy level is the outermost shell, it is stable with 8 electrons. True
4. Atoms tend to react in ways that give each atom a stable outer shell of electrons. True
5. Atoms with an outer shell that is almost empty are located on the right side of the Periodic Table while atoms with an outer shell that is full or almost full are located on the left side of the Periodic Table. False
6. Atoms in the same row of the Periodic Table tend to have the same number of valence electrons. False
7. Atoms with 7 valence electrons tend to be non-reactive. False
The student's true/false answers about the periodic table and atomic properties have been corrected, clarifying misconceptions about valence electrons and the reactivity of different elements based on their position in the periodic table.
The responses to the true/false questions on the properties and behaviors of atoms in the period table are as follows:
The eight-element periodicity found in the Periodic Table is related to the number of electrons in the outermost energy level of the atoms that make up each element. TrueElectrons in the first energy level of an atom are called valence electrons. False - Valence electrons are the electrons in the outermost energy level.For atoms important to life, if the first energy level is the outermost shell, it is stable with 2 electrons. If any other energy level is the outermost shell, it is stable with 8 electrons. TrueAtoms tend to react in ways that give each atom a stable outer shell of electrons. TrueAtoms with an outer shell that is almost empty are located on the right side of the Periodic Table while atoms with an outer shell that is full or almost full are located on the left side of the Periodic Table. False - It is the opposite.Atoms in the same row of the Periodic Table tend to have the same number of valence electrons. False - It is atoms in the same column that have the same number of valence electrons.Atoms with 7 valence electrons tend to be non-reactive. False - Atoms with 7 valence electrons are actually quite reactive as they tend to gain an electron to achieve a full outer shell.Take note that elements in the noble gases group have a full valence shell, making them very stable and non-reactive. Elements with 1-3 valence electrons tend to lose electrons forming positively charged ions, whereas elements with 4-7 valence electrons typically gain or share electrons to achieve stability.
Volcanoes occur at all of the following EXCEPT ____. where plates are moving apart where plates are moving together hot spots cool areas in the mantle
Which of the following contains stem cells that can produce only their own type of cells?
A. 6-week-old embryo
B. 3-day-old embryo
C. Adult
D. Blastocyst
the apex answer is C) Adult
How has government regulation of public lands affected the environment?
The government regulations of the public land helped in sustaining the resources. In the lands, which are under the government regulation, the guidelines are provided for the use of land resources. These guidelines are designed in such a way that the resources are used in sustainable manner and would be available for future generations. Hence, the government regulation of the land prevented the exploitation of the resources and helped in maintaining a sustainable environment.
Answer:
The government regulations of the public land helped in sustaining the resources. On the grounds, which are under government regulation, guidelines are provided for the use of land resources. These guidelines are designed in such a way that the resources are used in a sustainable manner and would be available for future generations. Hence, the government regulation of the land prevented the exploitation of the resources and helped maintain a sustainable environment.
Explanation:
correct on edge
When diverse peoples form a single nation, then _____ has occurred.
...?
Students on a field trip to a potato farm examine a few potatoes. Which of the following features will help them conclude that the potato is an underground stem? the presence of a swollen portion indicating food storage, which is a function of stems the presence of fine roots that develop into new plants the presence of buds located in the potato eyes, which represent the nodes
The presence of buds located in the potato eyes, which represent the nodes, will help the students conclude that the potato is an underground stem. Each 'eye' of a potato is a node where a new shoot could emerge, indicating its stem nature.
What type of channel is responsible for the initial changes in the membrane potential of the hair cells, which ultimately determines the cochlear nerve response to sound?
A prokaryote is most likely to use which of the following modes of metabolism to release energy if it is in an environment without oxygen, dies when exposed to oxygen, and uses fermentation?
A. Photoautotroph
B. Facultative anaerobe
C. Obligate anaerobe
D. Heterotroph <---- is the right answer
Considering only personal water use, people in the developed world use about _____ than people in the developing world
When we consider personal water use, people in developed countries use more water compared to those in developing countries.
How is water usage in developed countries different from developing countries?In a developed country like America, the average water use by a family is about 552 gallons comparing it to an African family which uses about 5 gallons of water every day. In developing countries, women have to walk about 4 miles to fetch water. An average person needs 20 to 50 liters of water each day for cooking, cleaning, drinking, and sanitation.
Water is one of the most important resources for human health, environmental protection, poverty alleviation, sustainable development, peace and security. Yet, more than 40% of people worldwide lack access to clean water.
Water scarcity affects several sectors, such as food security. About 70% of global freshwater is used by agriculture. Water scarcity, flooding, and water quality are the primary causes of water-related diseases in developing countries. In the developing world, water-related illnesses account for up to 80%.
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Which statement best summarizes "Save the Coral Reefs”?Coral reefs are a very important component of the ocean’s ecosystem because they support sea life, such as crabs and sea turtles. In fact, over four thousand species depend on the survival of the reefs, which are being destroyed by bleaching. More must be done immediately to save the reefs.
Development along the coastal regions has significant negative effects on coral reefs. The reefs are an essential part of the ocean’s ecosystem, and when people build structures on top of them, they are easily damaged because they are so fragile.
Answer;
-Coral reefs are a very important component of the ocean’s ecosystem because they support sea life, such as crabs and sea turtles. In fact, over four thousand species depend on the survival of the reefs, which are being destroyed by bleaching. More must be done immediately to save the reefs.
Explanation;
-Coral reefs are important for many different reasons aside from supposedly containing the most diverse ecosystems on the planet.
-They protect coastlines from the damaging effects of wave action and tropical storms ( they provide a buffer, protecting our coasts from waves, storms, and floods, helping to prevent loss of life, property damage, and erosion) and also provide habitats and shelter for many marine organisms.
Answer:
Coral reefs are a very important component of the ocean’s ecosystem because they support sea life, such as crabs and sea turtles. In fact, over four thousand species depend on the survival of the reefs, which are being destroyed by bleaching. More must be done immediately to save the reefs.
Explanation:
when a hydrocarbon chain is bent, it is called ____
why it is important to study the menstrual cycle
Answer:
1. To maintain health and fitness
2. Helps know the fertile period
3. To be more productive
4. Improve the life of husband and wife
Explanation:
1. To maintain health and fitness
In the second week after menstruation is finished, increasing estrogen in the body will provide lots of energy when exercising. The body will be able to burn more bad fats and calories.
2. Helps know the fertile period
In planning a pregnancy, this will be very helpful. Most women will reach the peak of fertility between 12 to 16 days before menstruation. It also can be seen that the most infertile period is the days after the menstrual period is finished or ended.
3. To be more productive
What is meant here is that women will be more productive at work. According to Dr. Harper, women tend to feel more productive during the 2-week monthly period.
4. Improve the life of husband and wife
In the second or third week of the menstrual cycle, women's testosterone and estrogen levels will increase so that it is easy to reach an intense climax. So this time is the right time to build a romantic atmosphere in the room
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Class : Senior High
Subject : Biology
Keywords
- Menstrual Cycle
describe the role of proteins in the release of energy stored in ATP
The role of proteins in the release of energy stored in ATP is that protein is the holder of ATP that is broken down.
What are proteins?Proteins are big, complex molecules that perform numerous important functions in the body. They are essential for the structure, function, and regulation of the body's tissues and organs and do the majority of the work in cells.
Proteins are also used in the synthesis of ATP. Other than proteins, glucose, and fats synthesize energy. Proteins break down the bonds in ATP to release energy. Proteins can either form pyruvate or Acetyl Co-A and participate in aerobic respiration to produce ATP.
Therefore, proteins play a part in the release of energy held in ATP by acting as the keeper of the ATP that is broken down.
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Rosalind Franklin's x-ray diffraction images of DNA gave James Watson and Francis Crick information about DNA's
A. function.
B. structure.
C. optimal temperature range.
D. location within the cell.
Answer:
B. structure. is the correct answer.
Explanation:
Rosalind Franklin's x-ray diffraction images of DNA gave James Watson and Francis Crick information about DNA's structure.Rosalind Franklin utilized a method called X-ray crystallography to determine out the 3D form of molecules and made important contributions in understanding the accurate DNA structure. James Watson and Francis Crick used Franklin's data in creating a three-dimensional form of DNA. They proved that DNA is a double helix structure and the two strands of DNA are wind around each other like a twisting ladder.list three things we can measure in our body
The remains of these form oil and natural gas
nonrenewable resources
renewable resources
methane hydrates
marine organisms
petroleum
nonliving resources
The correct answer is - marine organisms.
Both, the oil and the natural gas are formed on the basis of dead marine organisms. When the marine organisms were dying, they were falling in depths and onto the sea/ocean floor. The sea floor is covered with very soft sediments, and if they were not eaten by scavengers, or they have been covered with another layer of sediments, they have been relatively well preserved. As they were decomposing, the isolation, temperature, and pressure, managed to transform the dead remains of the marine organisms into oily sticky liquid that over time gained the characteristics that we see now in the oil and the natural gas.