Final answer:
Cell division in eukaryotic cells involves mitosis, where the nucleus divides, and cytokinesis, splitting the cytoplasm to form two identical daughter cells. It consists of four phases of mitosis: prophase, metaphase, anaphase, and telophase, followed by cytokinesis.
Explanation:
Overview of Cell Division
Cell division is a fundamental process in the life cycle of eukaryotic cells where one cell divides to form two new daughter cells. This process is essential for growth, repair, and reproduction of organisms. The division includes two main stages: mitosis, which is the division of the nucleus, and cytokinesis, which is the division of the cytoplasm.
Mitosis and Cytokinesis
Mitosis occurs in four distinct phases:
Prophase - Chromosomes condense, and the mitotic spindle begins to form.Metaphase - Chromosomes align at the center of the cell.Anaphase - Sister chromatids are pulled apart to opposite ends of the cell.Telophase - Two new nuclei form around separated chromatids.
Following telophase, cytokinesis divides the cytoplasm, resulting in two identical daughter cells, each with a complete set of chromosomes.
forms the hydrophobic part of the plasma membrane
Final answer:
The hydrophobic part of the plasma membrane is comprised of the inward-facing tails of phospholipids, forming the lipid bilayer that separates internal cellular contents from the extracellular environment.
Explanation:
The hydrophobic part of the plasma membrane is formed by the tails of phospholipids. These hydrophobic tails face inward, shielded from water, while the hydrophilic heads face outward, interacting with the aqueous environment on both sides of the membrane. This arrangement creates the integral structure known as a lipid bilayer, which is essential for the function and stability of the cell membrane. Additionally, cholesterol and integral proteins, with their hydrophobic regions, also contribute to the hydrophobic nature of the membrane's core.
Three bases found on mRNA are called:
Codons are the three bases found on mRNA that specify a particular amino acid in protein synthesis.
Explanation:Codons are triplets of nucleotides on messenger RNA (mRNA) that encode specific amino acids during protein synthesis. Each codon corresponds to one of the 20 amino acids, with some codons generally signalling the start or stop of protein translation.
The genetic code is degenerate, meaning multiple codons can code for the same amino acid. Transfer RNA (tRNA) molecules recognize and bind to codons, delivering the appropriate amino acid to the growing polypeptide chain. This process, known as translation, is fundamental to cellular function, as proteins are essential for the structure, function, and regulation of cells, tissues, and organisms.
The diagnostic procedure to measure the capacity of the lungs and the volume of air during inhalation and exhalation is ________.
The layer of the epidermis in which cells die because of their inability to get nutrients and oxygen is the clear layer called
The least important role of nutrition in wellness is learning to
Answer
obtain a variety of foods.
eat a high fiber diet.
choose high quality sources of foods.
consume foods that will help prevent disease in your body.
Light energy from the sun is converted by plants into _____.
mechanical energy
chemical energy
electricity
leaves
Answer:
chemical energy
Explanation:
Green plants have chlorophyll pigment that serves to trap the sunlight. The light energy from sun is used to drive the ATP synthesis during light dependent reactions of photosynthesis. The ATP serves as energy source for dark phase of photosynthesis during which carbon dioxide is fixed into glucose. Hence, plants use the process of photosynthesis to convert the light energy of sun into chemical energy of glucose.
An nrbc (nucleated red blood cell) is _______ a mature erythrocyte.
a. less mature than
b. the same as
c. more mature than
d. from a different cell line than
Answer: A.
Nucleated red blood cell is less mature than a mature erythrocyte. They
are erythroid precursors that have apoptotic nucleus, the last nucleated stage of
red blood cell production to contain a defined, intact nucleus before the
erythrocyte losses its nucleus.
Moreover, they are confined to the bone marrow, in the peripheral blood in newborns and in uncompensated hemolytic anemia.
In human males, the urethra is used for transport of
In human males, the urethra is used for transport of semen and urine.
The urethra is a thin fibromuscular tube through which urine and semen are transported from the bladder and ejaculatory ducts, respectively, to the outer part of the body in human males. The male urethra is made up of several heterogeneous parts which are membranous, prostatic and spongy. The urethra only transports urine in human females.
Why is pigweed so difficult to control? select all that apply. why is pigweed so difficult to control? select all that apply. the number of inches it grows daily the way it spreads like a vine on the ground and is hidden from view its thick, woody stem the number of seeds it produces?
Pigweed is difficult to control due to its high seed production, rapid growth, and ability to germinate easily. It is also challenging because of the development of herbicide resistance. Integrated management strategies are necessary to control pigweed effectively.
Explanation:Pigweed is a problematic agricultural weed because it possesses several attributes that make it difficult to control. One of the key reasons is its ability to produce a vast number of seeds, which can lie dormant in the soil for extended periods, ensuring its prolonged presence in an area. Its seeds germinate readily, often requiring little to no special conditions. This contributes to a substantial 'seed bank' in the soil, guaranteeing future generations of the weed.
Another challenge in controlling pigweed is its rapid growth. Quick growth allows pigweed to efficiently compete for resources, which is crucial in agricultural settings where it can out-compete crops for necessary nutrients and light. Additionally, weeds like pigweed are known to reproduce readily, enhancing their chances of survival and spread within a farm.
Methods such as chemical control, using herbicides, can face challenges as some weeds have developed resistance to commonly used herbicides, further complicating control efforts. Integrated management strategies, combining cultural practices with biological and chemical controls, are often required to effectively manage pigweed populations in agricultural fields.
A grassland is a region where the annual precipitation is _______________________________________________________________
Alendronate and ibandronate are drugs classified as ______ because they decrease the release of an enzyme that causes bone cell breakdown.
How does the use of nonrenewable resources compare to the use of renewable resources?
a. The use of renewable resources is potentially more harmful to the environment than the use of nonrenewable resources.
b. The use of renewable resources is more common and widespread than the use of nonrenewable resources.
c. The overuse of renewable resources can lead to problems similar to those associated with the use of nonrenewable resources.
d. Renewable resource use is more problematic than the use of nonrenewable resource use.
Answer: c. The overuse of renewable resources can lead to problems similar to those associated with the use of nonrenewable resources.
Renewable resources are those resources, which can be replenished after once used such as wind, water, sunlight and others. Non- renewable resources are those resources, which cannot be replenished after once used, for example fossil fuels like coal, petroleum and natural gas.
Although, renewable resources are abundantly available in nature but their judicious use is necessary, so that these resources can meet the needs of the future generation, ensuring sustainable development of human society. But, in reality the overuse of renewable resources can lead to problems similar to those associated with the use of nonrenewable resources. This is because of increasing population and pollution in the environment, has deteriorated the quality and decreased quantity of renewable resources.
The overuse of renewable resources can lead to problems similar to those associated with the use of nonrenewable resources. Therefore, option (C) is correct.
What are non-renewable resources?While nonrenewable resources, such as fossil fuels, are finite and have a limited supply, renewable resources, such as solar or wind energy, can be replenished naturally or through human intervention. However, it is important to note that the overuse or mismanagement of renewable resources can lead to negative consequences, similar to those associated with nonrenewable resources.
For example, if renewable resources are exploited at a rate faster than they can naturally regenerate, it can result in depletion, habitat destruction, or environmental degradation. Thus, sustainable management and responsible use of both renewable and nonrenewable resources are crucial for long-term environmental sustainability.
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what are the similarities between an onion and whitefish cells?
Cell division is the process in which cell divides and give rise to daughter cells. The phases of cell division are studied to understand the process. The onion root tip and white fish cells are used to study the mitosis.
Cell cycle is composed of interphase, mitosis, and cytokinesis. The mitotic phase involves the production of two identical daughter cells having same number of chromosomes as parent cell. The mitosis constitute of prophase, metaphase, anaphase, and telophase stages.
The similarity in onion root tips and whitefish cells are:
The stages of mitosis are similar in both the cells. These cells are used to study mitotic division. These cells are rapidly dividing, which makes it easier to understand the process of cell division.However, the cells differ in the cytokinesis process.
Therefore, the onion root tip cells and whitefish cells exhibit rapid division and are used to study mitosis.
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The nurse is preparing a patient for a procedure with the thoracoscope to reduce the exacerbations of chronic obstructive pulmonary disease (copd). what procedure should the nurse be sure the patient understands?
When sperm cells and egg cells combine we say?
During an infection, _____ are mobilized in large numbers from the bone marrow to fight pyogenic bacterial infections.
Thermal pollution is?
A, b or c
Which of these is a bacterium that is sometimes used to turn milk into different kinds of cheeses?
What are the five vital signs that are evaluated in the apgar? heart rate, breathing, muscle tone, color, and reflexes the babinski, moro, stepping, swimming, and grasping reflexes cuddling, startling, irritability, vocal response, and visual response sucking reflex, breathing reflex, size, weight, and disease symptoms?
Invasion and multiplication of bacteria in body tissues result in local cellular injury due to _______________.
The baroreceptors in the carotid sinus and aortic arch are sensitive to which of the following?
Answer: Changes in arterial pressure
Baroreceptors are present in carotid sinus, and their main function is to maintain homeostasis. They are responsible for maintaining the blood pressure. They can sense the changes in pressure of the walls of the arteries. This way blood pressure is regulated.
Since the main function is related to blood pressure, other options are incorrect.
When forming the disaccharide maltose from two glucose monosaccharides: (1 point) water is eliminated. a hemiacetal is converted to an acetal. the resulting dissacharide is no longer a reducing sugar. both a and
b. a, b, and c above?
The study of a living being is called biology.
The correct answer to the question is option A.
What are biomolecules?A biomolecule or biological molecule is a loosely used term for molecules present in organisms that are essential to one or more typically biological processes, such as cell division, morphogenesis, or developmentAccording to the question, water is eliminated. When forming a disaccharide from two monosaccharides in a process called condensation, water is eliminated and the resulting disaccharide is no longer a reducing sugar except for the case of maltose and lactose.
Carbohydrates are among the major food substances, they contain carbon, hydrogen, and oxygen.
They are classified into monosaccharides (building blocks), disaccharides (two monosaccharides), and polysaccharides ( a chain of many monosaccharides).
Hence, the correct answer is option a.
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What is considered to be the average natural mutation rate that occurs during dna replication? what is considered to be the average natural mutation rate that occurs during dna replication? one in every trillion nucleotides replicated. one in every ten thousand nucleotides replicated. one in every billion nucleotides replicated. one in every million nucleotides replicated?
What term describes the mode of asexual reproduction in which offspring develop from unfertilized eggs?
Which is the correct order the organisms would appear during primary succession?
A. Mosses, trees, lichens, grasses and annual flowers, bushes and shrubs
B. Lichens, mosses, grasses and annual flowers, bushes and shrubs, trees
C. Bushes and shrubs, mosses, lichens, grasses and annual flowers, trees
D. Lichens, bushes and shrubs, grasses and annual flowers, trees, mosses
C, bushes and shrubs, mosses, lichens, grasses and annual flowers, trees
hope I helped ..
Heart muscle cells would tend to separate without ________
a. stroma
b. intercalated discs
c. flana
d. myofilaments
Intercalated discs in heart muscle cells play a crucial role in connecting these cells together and facilitating coordinated contraction of the heart. Without them, heart muscle cells would tend to separate.
Explanation:Heart muscle cells, also known as cardiomyocytes, would tend to separate without intercalated discs. Intercalated discs are complex structures that connect heart muscle cells to each other. They play a pivotal role in enabling coordinated contraction of the heart, facilitating the efficient pumping of blood. Without intercalated discs, the coordinated contraction would not be possible, causing the heart muscle cells to separate. So, the correct answer to your question is b. intercalated discs.
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In double fertilization, one sperm fuses with the egg to form the diploid zygote and the other sperm fuses with two polar nuclei to form the ____________.
In double fertilization, one sperm fuses with the egg cell to form the diploid zygote and the other sperm fuses with two polar nuclei to form the endosperm.
What is Double fertilization?Double fertilization is the process of fusion of the sperm (male gamete) with the female gamete to produce different cells. Double fertilization is made up of two processes which are fertilization and triple fusion.
Fertilization includes the fusion of the haploid male gamete with the haploid female gamete to form a diploid zygote which forms the new plant which is diploid.
Triple fusion includes the fusion of the male gamete which is haploid with the two polar nuclei which are present with the egg cell in the female gametophyte, thus producing a triploid (3n) primary endosperm nucleus or Endosperm.
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Why would a doctor inject a dilute salt solution rather than pure water into the bloodstream of a patient who has suffered severe blood loss? select one:
a. because salt will assist in co-transport of needed nutrients into the patient's cells.
b. because pure water might cause the patient's red blood cells to shrink.
c. because pure water might cause the patient's red blood cells to burst.
d. because salt will help prevent bacterial infections?
The rapid growth of the human population during the last two centuries is INDIRECTLY responsible for which environmental concern, that in turn, will lead to future species extinction
identify the process by which information in segments of human DNA can be expressed by a bacterial cell
Genetic engineering uses recombinant DNA technology including manipulation of the segments of human DNA that can be expressed by a bacterial cell.
What is genetic engineering?They are the different scientific-technological techniques and procedures that allow the human being to modify or recombine the DNA and other nucleic acids of living beings.
To do this, genes are added, altered or deleted from the genetic code of living beings, also called genetic editing.
Therefore, we can conclude that genetic engineering uses recombinant DNA technology including manipulation of the segments of human DNA that can be expressed by a bacterial cell.
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