Which of the following limits the maximum size of a cell?
A. The stage of the cell cycle
B. The ratio of cell surface area to volume
C. The number of mitochondria in the cell
D. The size of the organism
The ratio of cell surface area to volume limits the maximum size of a cell (Option B).
The plasma membrane that surrounds a cell controls the passage of materials (nutrients, waste products, etc) inside and outside the cell.The cell surface area is directly associated with the rate at which this passage occurs and cell volume.In consequence, as the cell surface increases, the cell volume then can increase in a faster manner.In conclusion, the ratio of cell surface area to volume limits the maximum size of a cell (Option B).
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From the origins of the human species some 3 million years ago until about the year 1800, most people in the world lived in which type of societies
The final product of ____ is 2 pyruvic acid molecules.
A). The Krebs cycle
B). Glycolysis
C). Aerobic respiration
D). None of the above
The final product of glycolysis is 2 pyruvic acid molecules, which is the first step in cellular respiration where glucose is broken down to produce energy.
Explanation:The final product of glycolysis is 2 pyruvic acid molecules. Glycolysis is the first step of cellular respiration, a process through which cells break down glucose to produce energy. During glycolysis, one molecule of glucose (a six-carbon compound) is transformed into two molecules of pyruvic acid (a three-carbon compound).
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________ cells, which differentiate into osteoblasts, are located in the endosteum and inner cellular layer of the periosteum.
A child recovering from a severe asthma attack is given oral prednisone 15 mg twice daily. what is the priority nursing intervention
The priority nursing intervention would avoiding exposure of the child to infection. The explanation behind this is prednisone decreases the child's resistance to definite infectious progressions and, as an anti-inflammatory drug, covers infection. The child will self-limit action contingent on respiratory status. The eosinophil count is frequently reliably improved in children with asthma. The child will need sufficient hydration to help release and eject mucus.
Why is sandstone considered a rock and NOT a mineral? What characteristics of a mineral does it not meet? Answer in at least 2 sentences
Final answer:
Sandstone is a rock because it lacks a consistent crystal structure and is made up of various minerals and particles, unlike a mineral which must have a unique crystalline structure and a specific chemical formula.
Explanation:
Sandstone is considered a rock and not a mineral because it does not have a consistent internal crystal structure and is not composed of a single substance. A mineral, by definition, is a naturally occurring, inorganic solid with a specific chemical formula and a unique crystalline structure. Sandstone fails to meet these criteria because it is a clastic sedimentary rock composed of sand-sized particles that can include a variety of minerals like quartz and feldspar, as well as rock fragments or organic material. Different parts of sandstone may have different compositions, making it heterogeneous. Furthermore, sandstone is often found in layers or beds, can be granular or gritty, and displays physical characteristics like color variation and potentially containing fossils, which are not features specific to minerals.
what happens to food energy during photosynthesis
the cells of unicellular organisms are A.) specialized to perform specific tasks B.) larger than those of multicellular organisms C.) able to carry out all of the functions necessary for life D.) unable to respond to changes in the environment
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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In any ecosystem, all incoming energy will eventually be
A. passed on to the decomposers when organisms die
B. released into the surrounding environment as heat
C. transferred up from one trophic level to the next
D. used by plants in the process of photosynthesis
A reaction in which the reactants have a greater amount of free energy than the products that are formed will be
A. endergonic, with a net release of free energy to the surroundings
B. endergonic, absorbing free energy from the surroundings
C. exergonic, with a net release of free energy to the surroundings
D. exergonic, absorbing free energy from the surroundings
The nurse is caring for a client who has a multifetal pregnancy. what topic should the nurse prioritize during health education
Which is a common complication of gonorrhea and chlamydia?
What is the smallest lithostratigraphic rock unit? formation bed layer group
Answer: Option (1)
Explanation:
The basic lithostratigraphic unit of rock is formation. A formation is comprised of definite rock body whose rock characteristics can be compared to another rock strata, and can be mapped easily.
A bed is defined as the distinctive rock layer that can be differentiate from its upper layer and the lower layer, and are usually more than 1 cm in thickness.
A layer is defined as a distinct rock body, which has a particular rock materials and are distinguishable from one type to another and they are precisely traceable.
A group of rock is comprised of different rock units or layers, forming a division of the geological rock history.
Thus, the correct answer is option (1).
Which of the following is an example of natural resources? (4 points)
Factories, good roads, and a large population
Rich soil, forests, and minerals
Automobiles, dairy farms, and governments
Stores, chemical companies, and clothing factories
Why is a fat-free diet dangerous?
It can cause the body to break down muscle tissues.
It can result in a deficiency of essential carbohydrates.
It can result in a deficiency of essential fatty acids.
It can result in a deficiency of essential fatty acids.
What is the primary storage form of carbohydrate in the body?
a. glucagon
b. glucose
c. starch
d. fiber
e. glycogen?
Glycogen is the primary storage form of carbohydrates in the body, stored in liver and muscle cells, and is broken down into glucose when needed.
Explanation:The primary storage form of carbohydrate in the body is e. glycogen. Glycogen is made up of glucose monomers and is a highly branched molecule, usually stored in liver and muscle cells. Glycogen functions as the animal equivalent of starch. When the blood glucose levels decrease, the body breaks down glycogen into glucose in a process called glycogenolysis, maintaining the homeostasis of glucose levels in the bloodstream.
what types of carbohydrates are made of chains of alpha and beta glucose?
What are the bonds that hold nucleotides together in a "base-pair"?
When a doctor observes your symptoms and tells you that you have flu, she is reasoning?
When a doctor observes the symptom of a patient and tells that he or she is likely having a flu, the reasoning she or he used is likely from the effect to cause. The reasoning from effect to cause is having to check on the cause in order to produce or come out with the effect in which the symptoms is the cause of the flu, in which the flu is the effect.
Of the 65 million americans living with an incurable sexually transmitted infection, most of them have
Of all the sixty five million americans living with an incurable sexually transmitted infection, most of the ones that have it are young people. As well as men with men, minority population and even certain racial groups as these are likely the factors or people who are most likely to acquire the infection.
What is the breakdown of rocks and minerals into small particles without a change in composition called?
(a) Igneous Intrusion
(b) Chemical Precipitation
(c) Metamorphic Foliation
(d) Mechanical Weathering
Which type of memory allows you to have meaningful conversations?
The memory responsible for allowing us to have meaningful conversations is the echoic memory. This type of memory falls under the sensory memory in which they use the auditory information that enables an individual to retain and recall information with the use of his or her way of perceiving sound and for a person to be able to create meaningful conversations towards other people.
Which process brings energy to the biosphere?
What is the purpose of the villi and microvilli of the small intestine and the circular folds of the large intestine?
Final answer:
The villi and microvilli of the small intestine significantly increase the surface area to optimize the absorption of nutrients, while the circular folds of the large intestine help in slowing down waste to absorb water and electrolytes.
Explanation:
The purpose of the villi and microvilli in the small intestine is to augment the available surface area to maximize the absorption of nutrients. Absorptive cells that line the small intestine have microvilli, small projections that further boost surface area for enhanced nutrient absorption. Additionally, the small intestine is characterized by folds, known as villi, which are covered with microvilli, enlarging the surface area up to 600 times. This adaptation facilitates efficient digestion and absorption due to the extensive contact area for digestive enzymes and nutrient uptake. The folds in the mucosa are akin to the corrugations of cardboard, aiming to maximize the surface area in a limited space. Each villus encompasses a network of blood and lymph vessels that transport the absorbed nutrients throughout the body.
On the other hand, the large intestine features circular folds, which primarily function to slow the passage of waste material, allowing for more time to absorb water and electrolytes. The large intestine does not have villi or microvilli as its primary function is concerned with water absorption and waste formation rather than nutrient absorption.
Human processes mainly contribute to the
True or false carbohydrates also make up part of the cell membrane
what was the most likely source region for the air mass over pennsylvania
The air mass over Pennsylvania typically originates from the continental polar region (bringing cold, dry air) or the maritime tropical region (bringing warm, moist air).
Explanation:The source region for the air mass over Pennsylvania is typically the continental polar or maritime tropical regions. These source regions typically influence the climate and weather patterns of the state. Continental polar air masses originate from the northern plains of Canada and bring cold, dry air. Maritime tropical air masses originate from the Gulf of Mexico and bring warm, moist air. The type of air mass over Pennsylvania can change depending on the season and weather patterns.
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The ion needed to initiate the release of acetylcholine into the synaptic cleft is
The ion needed to initiate the release of acetylcholine into the synaptic cleft is the calcium ions.
What is a Synaptic cleft?A synaptic cleft may be defined as the type of tiny space after the axon terminal of the pre-synaptic neuron and initiation of the cell body or dendrites of the postsynaptic neuron. It is also known as the synaptic gap.
When the presynaptic membrane of an axon terminal is depolarized, it induces the opening of voltage-gated calcium ion channels. It allows the influx of calcium ions inside the cell.
This entry of calcium ions induces the fusion of synaptic vesicles with the membrane and finally the liberation of neurotransmitters such as acetylcholine molecules into the empty space which is known as the synaptic cleft.
Therefore, calcium ions are needed in order to initiate the release of acetylcholine into the synaptic cleft.
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Why algae in the ocean can have a very high NPP and a very low amount of stored biomass
true or false : the endoplasmic reticulum is in charge of decoding the messenger RNA to produce proteins
1. In a population of 200 field mice, 98 mice are homozygous dominant for brown fur (FF), 84 mice are heterozygous (Ff), and 18 mice are homozygous recessive and have white fur (ff).
A. What are the genotype frequencies of this mice population?
FF =
Ff =
ff =
B. What are the allele frequencies of this population?
F allele =
f allele =