The cells of unicellular organisms are capable of performing all of life's essential functions and responding to their environment. Unlike multicellular organisms where cells are specialized for specific tasks, each unicellular organism carries out all functions within a single cell. However, multicellular organisms offer higher levels of organization and complexity.
Explanation:The cells of unicellular organisms, such as bacteria, can carry out all the functions necessary for life. Unlike the cells of multicellular organisms which are specialized, each cell of a unicellular organism can perform tasks essential for its survival, such as converting the energy in sugar molecules into energy in ATP. At the same time, these cells can also respond to their environment by turning on and off specific genes according to the demands of their surroundings.
Despite this adaptability, unicellular organisms do not have the level of complexity or organization seen in multicellular organisms. Organisms composed of multiple cells can coordinate between distantly located cells and have developed systems such as a circulatory system or an efficient respiratory system to bring nutrients and oxygen to their cells respectively. Furthermore, these cells become more efficient by becoming specialized, doing fewer tasks but doing them extremely well.
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The _________ is the organelle which is sometimes referred to as the powerhouse of the cell due to the fact that it produces atp most efficiently.
After a period of prolonged fasting (starving), the brain changes its fuel requirements ________.
Final answer:
During prolonged fasting, the brain transitions from using glucose to using ketone bodies as the primary energy source due to depletion of glycogen stores and limited carbohydrate availability.
Explanation:
After a period of prolonged fasting (starving), the brain changes its fuel requirements from primary glucose to an increased reliance on ketone bodies as an alternative fuel source. Initially, in the absence of food, the body utilizes glycogen reserves, which are converted into glucose. However, when these stores are depleted, the body begins to metabolize fatty acids and proteins. Muscles switch from using glucose to fat-derived ketones to conserve protein and maintain glucose for the brain and other vital organs. Over time, as fasting continues and carbohydrate sources are limited, the brain starts to utilize ketone bodies more efficiently, which become the main energy source during prolonged starvation.
If a gene contains 300 dna nucleotides, how many amino acids will the protein that is assembled from this gene contain?
The imaginary line that separates the body into superior and inferior regions is called
One unit of platelets raises the platelet count which amount
Phytoplankton are microscopic plant-like organisms. In which zone of the ocean are you most likely to find phytoplankton? A.Hadalpelagic B.Abyssopelagic C.Epipelagic D.Bathypelagic
Answer: C. Epipelagic
The Epipelagic zone is the upper most layer of the ocean. It is the layer which receives maximum sunlight, because of availability of sunlight and nutrients like fresh oxygen and atmospheric carbon dioxide, this zone is suitable for active photosynthesis activity. This zone can sustain a large number of photosynthesizing organisms such as phytoplanktons. Phytoplanktons are small microscopic plant like organism which produce their own food by the process of photosynthesis. For example, diatoms.
Oxygen enters the ocean only at the surface, from __________ and ______________.
a. photosynthesis, the atmosphere
b. volcanic eruptions, meteorites
c. photosynthesis, respiration
d. respiration, photosynthesis
e. respiration, rainfall
Oxygen enters the ocean only at the surface, from photosynthesis and the atmosphere.
The question pertains to how oxygen enters the ocean. Oxygen enters the ocean mainly from two sources: photosynthesis and the direct exchange with the atmosphere. Photosynthesizing organisms, such as algae and cyanobacteria, which are also referred to as phytoplankton, play a crucial role in this process by converting carbon dioxide and water into oxygen and organic compounds. Additionally, the oxygen from the atmosphere dissolves directly into the surface of the ocean through physical mixing processes.
The correct answer to the student's question is "(a). photosynthesis, the atmosphere." Photosynthesis by marine organisms adds oxygen to the ocean waters, while the atmosphere exchanges gases with the ocean's surface, allowing more oxygen to dissolve into the water.
Some individuals have a mutated recessive allele and a homozygous individual is resistant to HIV infection and AIDS. Some populations have a high frequency of the mutant allele. What inference can be made about the mutant allele?
a. heterozygous individuals must be genetically advance even if they are not resistant to hiv
b. the mutated allele must have developed and been acquired by many people before exposure to the virus .
c. the mutated allele must not be inherited by offspring or disease would be close to eradication
d. being a homozygous is a advantage for mutated allele , while being heterozygous is genetic advantage
Answer:
b. the mutated allele must have developed and been acquired by many people before exposure to the virus .
Explanation:
How does the arrangement of atoms and bonds change
The arrangement of atoms and bonds within molecules, especially in cases of isomers, substantially affects their properties. Different bonding processes, both ionic and covalent, induce energy changes which give rise to these unique properties.
Explanation:The arrangement of atoms and chemical bonds within molecules fundamentally changes their properties. This is exhibited in isomers, molecules that have the same chemical formula but differ in the placement of their atoms and/or bonds.
For instance, structural isomers like butane and isobutane have the same number of carbon and hydrogen atoms (C4H₁0). However, their different arrangements lead to significant variations in properties where butane is more suited as a fuel and isobutane as a refrigerant.
The basis of these variations stems from the two main types of bonds, ionic and covalent, where the former represents a transfer of electron from one atom to another, and the latter represents a sharing of electrons. The energy changes in these bonding processes are what mainly contributes to different characteristics of molecules.
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What are the expected assessment findings for a herniated lumbar disk? ati?
The cell membrane is also known as a selectively permeable membrane because it allows selective substance to move inside the cell. It also helps in the recognition of certain chemicals.
Further Explanation:
The plasma membrane is the outermost layer of the cell. It forms the boundary between the intracellular and extracellular components. The main components of the plasma membrane are phospholipids, proteins, and carbohydrates. The phospholipids are arranged in a double-layer structure in which the head is present on the outside (water-loving) and the tail part is present inside the cell (water-hating). Proteins are present between phospholipids bilayer. These transmembrane proteins allow the molecules that could not enter the cell directly. The molecules pass by forming the channels, pores or gates. It also plays an important role in cell recognition, signaling and enzymatic activity. Carbohydrates are also present in the membrane, most of its part is found as glycoprotein. It helps in cell adhesion (cell attach to each other).
The functions of the cell membrane are:
1. It acts as a physical barrier: it physically separates the cytoplasm that makes up the cell from the extracellular fluid. It also allows separate activity to occur inside and outside the cell.
2. It allows selective permeability. The certain molecules can through them. Water, oxygen and carbon dioxide can easily move through the membrane. It does not allow ions such as potassium and sodium and other polar molecules to pass through them.
3. It also helps in facilitating the communication and signaling between cells.
Learn More:
1. Learn more about the treatment of eukaryotic cell with a drug https://brainly.com/question/10767798
2. Learn more about the proteins synthesis in a cell https://brainly.com/question/1420458
3. Learn more about an exchange of gases by blood cells https://brainly.com/question/1213217
Answer Details:
Grade: High School
Subject: Biology
Chapter: Structure ofCell
Keywords:
Cell membrane, selective, permeable, recognition, intracellular, extracellular, phospholipids, protein, carbohydrate, enzymatic, signaling, glycoprotein
Expectations for a herniated lumbar disk include pain and muscle weakness due to spinal nerve compression from the protrusion of the nucleus pulposus after the weakening of the anulus fibrosus.
Expected assessment findings for a herniated lumbar disk include pain and/or muscle weakness in the corresponding body regions supplied by the affected spinal nerve. Specifically, for a lumbar herniation, patients might present with sciatica, characterized by pain radiating from the lower back down the thigh and into the leg. The herniation occurs due to a weakening of the anulus fibrosus, leading to protrusion of the nucleus pulposus and subsequent nerve compression. Lifting a heavy object further increases pressure on the disk, exacerbating the protrusion and potentially increasing pain and dysfunction.
One way the body fights invaders is by increasing the body temperature, or running a fever. Give a brief explanation as to why that defensive technique works against some viruses or bacteria.
This is a writing assignment!
Some bacteria are not able to function properly and replicate at the fever-high temperatures hence this reduces their infection rates in the body. More research has also shown that the temporal increase in body temperature, during the fever, increases the activity of the cytotoxic T-cells that are significant in fighting infection.
In this exercise we have to explain how our body tries to fight bacteria and viruses just by increasing the temperature.
What is fever?Fever is not a disease in itself, it is usually the manifestation of some illness. Fever is characterized as an increase in temperature above normal levels.
So as explained, the answer will be our body's response so that bacteria can't multiply and thus destroy us from the inside. Leaving the environment with high temperatures and not conducive to its development.
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During which phase of the autopsy would swabs from orifices be taken?
A. external examination
B. internal examination
Answer: A. External examination
Explanation:
An autopsy is an examination which involves the detail analysis of the internal as well as external condition of the dead body.
In external examination body color, injuries, injection marks, tattoo marks and swabs of orifices are taken to determine the cause of death.
In internal examination the dissection of all the cavities of the body is done to determine the cause of death.
light can be diffracted or scattered true or false
What is the function of dna polymerase iii? select one:
a. to unwind the dna helix during replication
b. to seal together the broken ends of dna strands
c. to add nucleotides to the 3' end of a growing dna strand
d. to degrade damaged dna molecules?
True or false? low doses of cns depressants can cause sedative effects and relaxation.
What is an accretionary wedge briefly describe its formation?
A brush called a filbert is best used for ________.
Suggest two ways that reflex reactions help maintain homoeostasis in the human body.
Final answer:
Reflex reactions help maintain homeostasis in the human body by regulating functions such as heart rate and pupil size through the autonomic nervous system. The sympathetic and parasympathetic systems create a balance by providing opposing actions that respond to different environmental stimuli, essential for health and stability.
Explanation:
How Reflex Reactions Maintain Homeostasis
Homeostasis is the stable state of internal conditions in the human body. Reflex reactions play a critical role in this process. For instance, the autonomic nervous system manages involuntary functions such as heart rate and pupil dilation through the sympathetic and parasympathetic systems. These systems often act in opposition to create a balance, or homeostatic state.
Regulation of heart rate: The parasympathetic system reduces heart rate by slowing it down during rest, while the sympathetic system can increase heart rate during stress or activity, helping to provide more oxygen to tissues when needed.
Regulation of pupil size: Similarly, the sympathetic system dilates the pupils to let in more light and enhance vision under certain conditions, whereas the parasympathetic system constricts the pupils in bright light to protect the retina and maintain optimal vision.
These actions ensure that critical bodily functions are maintained within a narrow range of operation, which is essential for overall health and stability of the body's internal environment.
What is the term for the portion of the earth's atmosphere, hydrosphere, and geosphere where life is found?
Plasmids are important in biotechnology. give a full and complete definition of plasmid.
There must be equipoise in order to justify conducting a clinical trial.
a. True
b. False
How do group IQ tests administered to students create a self-fulfilling prophecy? A. Students with high scores tend to feel they are superior to other students. B. Students with low scores work harder while students with high scores don't. C. Students grouped by ability tend to feel that teachers are cruel and unfair. D. Students grouped by ability tend to decide they are either dumb or bright.
D. Studens grouped by ability tend to decide they are either dumb or bright.
Should be the answer.
The genes for sex-linked traits are carried on either the X or Y chromosome. Duchenne muscular dystrophy (DMD) is a recessive, sex-linked disease that is carried on the X chromosome. A woman with DMD and a man without the disease have a child. Which statement best describes the likelihood of the disease passing to their child?
a. There is a 100 percent chance that their daughter will have the disease.
b. There is a 50 percent chance that their son will have the disease.
c. There is a 50 percent chance that their daughter will have the disease.
d. There is a 100 percent chance that their son will have the disease.
Answer:
D
Explanation:
Adenosine triphosphate (ATP) molecules are used for the synthesis of a large number of biomolecules. Which two actions happen when bonds in ATP molecules are broken
an increase in the biodiversity of an ecosystem leads to an increase in its productivity T or F
The statement that an increase in the biodiversity of an ecosystem leads to an increase in its productivity is true.
Increased biodiversity in an ecosystem often leads to increased productivity. This is because diverse ecosystems tend to have a greater variety of species with different ecological roles (such as producers, consumers, and decomposers).
Each species contributes uniquely to the ecosystem's nutrient cycling, energy flow, and overall stability. As a result, diverse ecosystems can efficiently utilize available resources, leading to enhanced productivity in terms of biomass production and ecosystem services.
Biodiversity and productivity are closely linked in many ecological contexts.
Unlearned, involuntary responses that occur automatically in the presence of certain stimuli are known as ______________.
The _____ cartilage of the larynx forms the laryngeal prominence
Which hormone elevations indicate turner syndrome? select all that apply?
What similarities and differences do prokaryotes have with modern-day green plants?
The cells of prokaryotes and plants have different constitutions, and some similarities, because their cell class is different, but they belong to the same evolutionary line, for a better answer, we must understand....
Prokaryotic cellsProkaryotic or prokaryotic cells, also called protocells, are very different from eukaryotes (plants). Its main feature is the absence of cariotheca individualizing the cell nucleus, due to the absence of some organelles and the small size that is believed to be due to the fact that they do not have membranous compartments originated by evagination or invagination. They also have DNA in the form of a non-protein-associated ring (as in eukaryotic cells, in which the DNA is arranged in coiled strands and associated with histones).
To this group belong unicellular or colonial beings:
Bacteria Cyanophytes (cyanophyte algae, blue algae or even Cyanobacteria) PPLO ("pleuro-pneumonia like organisms") or MycoplasmasEukaryotic cells (plants)Eukaryotic or eukaryotic cells, also called eucells, are more complex than prokaryotes. They have individualized nuclear membrane and various types of organelles.
Most of the
Animals and Plantsthat we are used to are endowed with this type of cells.
Answering the questionWhat similarities and differences do prokaryotes have with modern-day green plants?With the information, we can say that the differences between a prokaryotic cell and a plant is the absence of caryothecae, absence of some organelles and the small size that is believed to be due to the fact that they do not have membranous compartments. The similarity between them is because both have DNA in the form of a ring not associated with proteins.
With this, we know that the prokaryotic cell has DNA just like plants, but the prokaryotic cell lacks several organelles that exist in plants.
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What type of epithelial tissue is specialized to stretch repeatedly without damage?