Prokaryotic and eukaryotic cells have different structures. Prokaryotic cells, found in organisms like bacteria, are simpler and lack a nucleus and other membrane-bound organelles. Eukaryotic cells, found in animals, plants, fungi, and protists, are more complex with a true nucleus and various membrane-bound organelles.
Explanation:Prokaryotic and eukaryotic are two types of cells that are distinct in their structures. Prokaryotic cells are simpler and they are typically found in microorganisms like bacteria. Some unique characteristics include the lack of a nucleus and other membrane-bound organelles. They have a singular circular chromosome that is housed in the nucleoid region of the cell. On the other hand, eukaryotic cells are more complex and are found in animals, plants, fungi, and protists. They have a true nucleus that houses multiple, linear chromosomes and a variety of other organelles like the mitochondria, endoplasmic reticulum, golgi bodies and more that are all encapsulated within membranes. Thus, not all cells have the same structure because it varies depending on whether the cell is prokaryotic or eukaryotic.
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In a population of 1000 individuals, 200 new individuals were born and 100 individuals died over the course of 1 year. Which equation shows how to calculate the population growth rate of this population?
A. 0.10 × 0.20 = 0.02
B. 0.10 – 0.20 = –0.10
C. 0.20 – 0.10 = 0.10
D. 0.20 + 0.10 = 0.30
Answer:
C
Explanation:
0.20-0.10=0.10
because the population was decreased
Answer:
Option C, 0.20 – 0.10 = 0.10
Explanation:
Total number of births taking place in an year is equal to 200.
Number of births per person is equal to
[tex]\frac{200}{1000} = 0.2[/tex]
Total number of deaths happening in an year is equal to 100
Number of deaths per person is equal to
[tex]\frac{100}{1000} = 0.1[/tex]
Net growth in population per person
Total number of births per person - total number of deaths per person
Substituting the given values in above equation, we get -
[tex]0.20 -0.10 = 0.10[/tex]
Hence, option C is correct
4.
Which of the following represents an ion?
(1 point)
a particle having 14 protons, 14 neutrons, and 14 electrons
a particle having 9 protons, 9 neutrons, and 10 electrons
a particle having 19 protons, 21 neutrons, and 19 electrons
a particle having 1 proton, 3 neutrons, and 1 electron
Option 'b a particle having 9 protons, 9 neutrons, and 10 electrons' represents an ion because it has different numbers of protons and electrons, resulting in a negative charge of -1.
Explanation:An ion is an atom or molecule that has a net electric charge due to the loss or gain of one or more electrons. To find which of the given particles represents an ion, we need to compare the number of protons to the number of electrons in each particle. If the numbers are equal, the particle is neutral; if not, it is an ion. Option 'a particle having 14 protons, 14 neutrons, and 14 electrons' is neutral because the numbers of protons and electrons are equal. Similarly, option 'c a particle having 19 protons, 21 neutrons, and 19 electrons' is also neutral for the same reason. Option 'd a particle having 1 proton, 3 neutrons, and 1 electron' represents a neutral hydrogen isotope. However, option 'b a particle having 9 protons, 9 neutrons, and 10 electrons' has more electrons than protons, making it an ion specifically, an anion with a charge of -1.
To study osmosis, a student placed a thin potato slice in a salt solution. The slice became soft and shriveled. Then, he placed the shriveled slice in water. The slice regained its original shape. Based on the observations, which of these statements is correct? A) The slice regained its shape because salt moved into the potato. B) The potato slice shriveled because water moved from the salt solution into the slice. C) The potato slice shriveled because water moved out of the slice into the salt solution. D) The slice regained its shape because the concentration of salt inside and outside the slice became equal.
Answer:
c
Explanation:
A scientific law is something we can use to make a specific, concrete prediction. For example, the law of gravitation states that masses will attract each other, and you will find that this is always the case. However, it can also be used to make concrete statements about the properties of an object in the right conditions. For example, if a material were found that was NOT attracted to other objects with masses, we could say that A) the material is charged. B) the material has no mass. C) the material must be floating. D) the material has very little mass.
Answer: Option B
The gravitational force can be defined as the force that attracts two objects that have mass and radius.
Two objects having masses are attracted towards each other and it never pushes them apart. The whole universe is attracting the objects with masses and this is the reason that the objects do not fall and stays in the universe.
The law of gravitation does not applies to the objects that no mass or negligible mass.
When a drug blocks reuptake or breakdown of a neurotransmitter by the action of enzymes, the drug is acting as an _____?
Final answer:
A drug that blocks the reuptake or breakdown of a neurotransmitter acts as an agonist, which enhances the action of neurotransmitters by mimicking their effects or blocking their degradation, like cocaine does with dopamine.
Explanation:
When a drug blocks reuptake or breakdown of a neurotransmitter by the action of enzymes, the drug is acting as an agonist. Agonists are substances that enhance the action of neurotransmitters. They can do so by several mechanisms, including mimicking the neurotransmitter's action at the receptor site, inhibiting reuptake of the neurotransmitter into the presynaptic cell, or inhibiting the enzyme responsible for breaking down the neurotransmitter. A common example of such a drug is cocaine, which acts as an agonist for dopamine by blocking its reuptake, thus increasing the levels of dopamine in the synapse and prolonging its action.
The kegel exercise by increase genital sensitivity by maintaining or restoring muscle tone to the
If a patient has 12 of their body covered with a psoriasis rash what would be the severity
A soil’s texture is determined by _____.
The right answer is particles' size.
The texture of a soil corresponds to the distribution in this soil of minerals by size category (in fact, diameter of the supposedly spherical particles) regardless of the nature and composition of these minerals. The texture of the soil does not take into account limestone and organic matter.
The particles are classified in the following way, according to their diameter: blocks, pebbles and gravel (diameter> 2 mm) are classified separately.
The actual particle size is fine earth.
Sands:> 50 μm
Silt: from 50 μm to 2 μm
Clays: <2 μm
A soil's texture is determined by the relative proportions of sand, silt, and clay particles. This texture affects water retention, root penetration, and nutrient availability.
Explanation:A soil's texture is determined by the relative proportions of three main particle sizes: sand, silt, and clay. The texture of a soil affects its ability to retain water, allow for root penetration, and influence the availability of nutrients. For example, sandy soil has larger particles and drains quickly, while clay soil has smaller, compact particles and retains water.
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our current understanding of evolution is called a theory because it has been
In the scientific community, a proposition is a well- tested and vindicated explanation for certain marvels.
Understanding the proposition of elaboration Critics of the proposition of elaboration frequently dismiss its significance by conflating the everyday operation of the word" proposition" with its scientific meaning.
In wisdom, a proposition is a body of completely tested and vindicated explanations for a set of compliances of the natural world. For illustration, we've a proposition of the snippet, a proposition of graveness, and the proposition of reciprocity, each describing well- understood data about the world. also, the proposition of elaboration describes data about the living world and has survived significant sweats to discredit it by scientists, who are naturally skeptical. In discrepancy, in common conversational, a" proposition" frequently means a conjecture or a suggested explanation, more akin to what scientists relate to as a thesis. When critics say elaboration is" just a proposition," they indicate there's little substantiation supporting it and that it's still witnessing rigorous testing. This is a mischaracterization since the proposition of elaboration is supported by a substantial quantum of substantiation and is a well- established scientific propositionComplete question is : "Our current understanding of evolution is called a theory because it has been supported repeatedly as new discoveries have been made. proven to be exactly true as originally proposed. corroborated by data that were gathered during a single experiment. developed from the postulates of many scientists."
If a stimulus plus a response results in a satisfying outcome, the probability of that responds occurring again ________.
Two solutions are said to differ in ________________ if they have different concentrations of non-penetrating solutes.
Tonicity refers to the difference in concentrations of non-penetrating solutes between two solutions and how it affects osmosis.
Explanation:The term that describes the difference between two solutions with different concentrations of non-penetrating solutes is tonicity. Tonicity is a property of a solution that refers to how it affects the volume of a cell by influencing osmosis. Solutions with different tonicity will have different concentrations of solutes and will therefore have different amounts of water on either side of a membrane.
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A moving, multicellular organism that cannot make its own food most likely belongs to which kingdom?
What characteristic of borrelia burgdorferi makes it an unusual bacterium?
the invention of the _______ made it easier for people to record nature
Answer:
Camera
Explanation:
The term "nature" can be used to describe both universal life and the phenomena of the physical world. The invention of the Camera made it easier for people to record nature.
What is Nature?In its broadest definition, the term "nature" is equivalent with the "natural world," "physical world," or "material world." Both the occurrences of the physical world and universal life can be referred to as "nature." It covers a broad scale, ranging from the subatomic to the cosmic.
The term "nature" can refer to a variety of phenomena, including the weather, geological processes, living things like plants and animals, and physics-related concepts like matter and energy. The expression is frequently used to refer to the "natural environment" or wilderness, which might include wild animals, rocks, woods, beaches, and other landscape characteristics that have either withstood human activity or have not been considerably impacted by it.
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What would you expect to see in a blood sample of a person who has drowned in salt water? explain in terms of osmosis?
Answer:
I would expect to see a withered cell because of the extreme lack of water.
Explanation:
Osmosis is the passage of solvent from a less concentrated solution to a more concentrated solution through a semipermeable membrane until the pressure exerted by the solution on the membrane prevents the passage of solvent. This process aims to balance the concentration of the solution.
Based on this, we can imagine what happens to the cells of a person who drowned in salt water.
Salt water has a higher salt (solute) concentration than human cells, so through osmosis the human cell provided a water outlet (solvent) to dilute the salt of the salt water and establish a balance between the medium. cell phone and salty water. With this extreme loss of water, human cells become wilted and collapse.
The oxidation of sucrose (sugar) into CO2 + H2O can occur quickly or slowly. Which of these modifications to the reaction is likely to cause the reaction to speed up the most? A) dissolving the sugar in water B) grinding the sugar into a fine powder C) cooling the sugar prior to the reaction D) pressurizing the container in which the reaction occurs
The answer is B. (The first answer above me is incorrect)
Answer:
B: Grinding the sugar down into a fine powder
Explanation:
What is the magnification of a microscope with a 10x ocular and 95x oil-immersion objective?
To know the total magnification of an image that you are observing through the microscope is moderately simple. To get the total magnification take the power of the objective and multiply by the power of the eyepiece, usually 10x.
So in this problem, 95 x 10 = 950. Therefore, the magnification is 950.
Final answer:
The total magnification of a microscope with a 10x ocular lens and a 95x oil-immersion objective lens is 950x.
Explanation:
The magnification of a microscope is the product of the magnifications of the ocular lens and the objective lens. If you have a microscope with a 10x ocular lens and a 95x oil-immersion objective lens, the total magnification would simply be the multiplication of these two numbers. To calculate the overall magnification of a compound light microscope with a magnification of 10x due to the eyepiece and a magnification of 100x due to the objective lens:
Take the magnification of the ocular lens: 10x
Multiply it by the magnification of the oil-immersion objective lens: 95x
Therefore, the total magnification is 10x × 95x, which equals 950x.
. What is the biological impact of minimum catch sizes on a population of fish? A) Older, less productive adults are removed, improving the population’s health. B) It applies a selective pressure for larger, faster growing fish. C) The fish in the population produce more eggs to compensate. D) The fish in the population produce healthier eggs to compensate. E) The population comes to be dominated by smaller, slower-growing individuals.
The biological impact of minimum catch sizes on a population of fish is that the population comes to be dominated by smaller, slower-growing individuals.
Explanation:The biological impact of minimum catch sizes on a population of fish is option E) The population comes to be dominated by smaller, slower-growing individuals. When minimum catch sizes are implemented, larger and faster-growing fish are more likely to be caught and removed from the population. As a result, the remaining fish in the population tend to be smaller and slower-growing individuals.
What are the characteristics of the cell membrane
In a population of humans, the frequency of straight hair is 34 percent. If straight hair is the recessive phenotype, what is the frequency of the homozygous recessive genotype? 17 percent 34 percent 66 percent 68 percent
Answer:
The correct answer would be 34 percent.
As the straight hair is a recessive trait, thus, the genotype of the people with straight hair phenotype would be homozygous recessive.
Hence, the frequency of individual with straight hair would be the same as that of an individual with homozygous recessive genotype.
So, the frequency of individuals with homozygous recessive genotype would be 34 percent.
Which region is visible only on the posterior/dorsal body surface?
Calcaneal is the region that is visible only on the posterior/dorsal body surface, hence option C is correct.
The calcaneus, sometimes known as the "heel," is a big, sturdy bone that makes up the rear of the foot and distributes the majority of the body's weight from the lower extremity to the ground. It is the biggest of the tarsus's seven articulating bones.
The biggest bone in the foot is called the "calcaneus," and it is found in the hind foot along with the talus. It is frequently called the heel, hence option C is correct.
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The given question is incomplete, so the most probable complete question is,
Which region is visible only on the posterior/dorsal body surface?
-mammary
-buccal
-calcaneal
-patellar
which term refers to the structure that form the surface of a cell separating the content from the outside world
Answer:
The term that refers to the structure that form the surface of a cell separating the content from the outside world is called a plasma membrane.
What kind of cat eats penguin and lives in an mountain and ice ecosystem?
Are neuroglia or neurons more likely to give rise to tumors? why?
Which is consistent with the concept of active correlations, helps explain why identical twins reared apart are often quite similar, despite experiencing different environments?
Active correlations contribute to the similarities between identical twins reared apart despite different environments through shared experiences and genetic influence.
Active correlations indicate shared experiences that contribute to similarities between twins, even when raised in separate environments. Studies on identical twins raised apart have shown strong correlations in behaviors, professions, and preferences, highlighting the impact of genetics and environment on individual development.
What is an organisms niche
Answer:
Niche:
Niche may be defined as the actual match of the species with its specific environmental condition. Niche explains the way by which organism uses its resources in the area.
The resources like food, predation and environmental factors may affect the niche of the organism. The species may change the environmental condition and may itself get changed in its niche. The term niche was first used by the Grinnell.
Thus, the answer is niche.
What benefit does an adult dog gain from being petted with long, smooth strokes?
A. The dog grows to be larger.
B. The dog learns to be more dominant.
C. The petting makes the dog stronger physically.
D. The petting reduces stress.
During binary fission, a bacteria cell grows in size because DNA and other organelles are _____.exchangedtransferredduplicatedremoved
Answer:
its duplicated
Explanation:
what material lets light pass through freely
Genotype is __________, whereas a phenotype is __________.
a. expressed; inherited
b. dominant; recessive
c. genetic; environmental
d. underlying; observed