The type of transcriptional control in operons in which a regulatory protein is an activator and stimulates transcription is called positive control.
What controls the transcription of an operon?The regulatory DNA sequences are the important class of factors that controls the transcription of an operon.
The types of transcriptional control in operons in which a regulatory protein is an inhibitor and inhibits transcription are called negative control.
Therefore, the positive control and negative control of the transcription of an operon depend on the nature of regulatory proteins.
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how does a catalyst work ?
Answer:
Magic.
Explantion:
Magic from the catalyst.
This cycle is significantly affected by the extraction of fossil fuels. Photosynthesis is a major flux in this cycle. The weathering of rock is a major flux in this cycle. Transpiration is a major flux in this cycle. This cycle's largest reservoir is the atmosphere. This cycle's largest reservoir is ocean water. This cycle is affected by the release of detergents in treated wastewater. Nitrification is a major flux in this
This cycle is significantly affected by the extraction of fossil fuels an this is the carbon cycle.
Which organic cycle is worried in burning of fossil fuels and photosynthesis with the aid of using plants?It is saved in what are referred to as reservoirs, and it actions among those reservoirs thru a number of processes, which includes photosynthesis, burning fossil fuels, and actually liberating breath from the lungs. The motion of carbon from the reservoir to reservoir is referred to as the carbon cycle.
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Which muscle fiber contracts slowly and is usually red due to the amount of blood vessels delivering oxygen to the muscle?.
Due to their immense oxygen needs, slow-twitch fibers are associated with many blood vessels, mitochondria, and increased concentrations of myoglobin, an oxygen-binding protein in the blood that provides muscles their reddish coloring.
The stage of the cell cycle during which the cytoplasm divides to form two cells is called.
Answer:
Cytokinesis
Explanation:
Cytokinesis is the step of the cell cycle in which the cell must faithfully separate the chromosomes and cytoplasm, yielding two daughter cells.
The process in which an ovum is discharged from an ovary each month is called __________?.
Answer:
ovulation
need 20 characters
What happens when the body fails to take up excess glucose from the blood a. The excess glucose binds to working proteins, rendering them nonfunctional. b. The excess glucose is metabolized to produce energy for physical activities. c. The excess glucose retains water in the body to prevent dehydration. d. The excess glucose from the blood gets stored in the adipocytes. e. The excess glucose gets converted into useful alcohols.
Explanation:The excess glucose gets converted into useful alcohols.
When the body is unable to take up excess glucose from the blood then at time the fats from the blood gets stored in fats storing cells called as adipocytes. The excess glucose gets converted into useful alcohols. Last option is correct.
What are adipocytes ?These are the cells that store fats in the human body are called as adipocytes. These are the main energy storing cells.
The excess glucose gets converted into useful alcohols.
At this situation glucose is provided by the the carbohydrates where the glucose is the stored compound in the form of glycogen.
Therefore, the excess glucose is stored in the form of useful alcohols.
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What form of natural selection does the histogram show?
disruptive selection
sexual selection
directional selection
stabilizing selection
The form of natural selection does the histogram show is disruptive selection.
What is a disruptive choice on a graph?In disruptive choice, choice pressures act on people withinside the center of the trait distribution. The end result is a bimodal, or -peaked, curve wherein the 2 extremes of the curve create their personal smaller curves.
Disruptive choice produces a populace that has severe variations of a trait because the dominant phenotype. For example, if each brief and tall organisms, however now no longer medium top organisms have been preferred this will be disruptive choice in action.
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What is cladistics?
OA. The comparison of species based on common behavioral
characteristics
B. The comparison of species based on their geographic range
C. The comparison of species based on the presence or absence of
ancestral traits
D. The comparison of species based on common physical
characteristics
The comparison of species based on common physical characteristics Thus, the correct option is D.
What is cladistics?Cladistics is a method of biological taxonomy that organizes taxa in a branching hierarchy so that all members of a given taxon share the same ancestors and defines taxa uniquely by shared traits not present in ancestral groupings.
Clades, which are collections of organisms made up of an ancestor species and its offspring, are also identified through cladistics.
A cladogram only displays one probable phylogeny for a collection of organisms. It can shed light on the process of evolution. A cladogram should not be viewed as a representation of genuine evolutionary processes, though. It may or may not depict what actually occurred. It merely illustrates what might have occurred.
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Which is required for both anaerobic respiration and aerobic respiration?
O oxygen
O water
• mitochondria
glucose
Answer:
glucose
Explanation:
glucose is the starting material or precursor for both aerobic and anaerobic respiration. Only the products and pathways are different.
Answer:
glucose
Explanation:
took the test
what is potential energy
Answer:
The energy of a body or a system with respect to the position of the body or the arrangement of the particles of the system.
Explanation:
Energy is a delicate notion that is extremely difficult to master. Energy is sometimes described as the ability to accomplish labor, that is, to push anything against a force. That isn't completely correct, since due to the Second Law of Thermodynamics and the fact that much energy is merely mass, there is a lot of energy that isn't accessible to do any work. We're on somewhat better ground with potential energy. When we say there is potential energy, we mean that there is something in a system that, if permitted to alter, has the capacity to accomplish work. Saying that there is potential energy is a form of abbreviation. Consider gravitational potential energy. If two masses are separated by a distance, we might let them fall together and accomplish some work, perhaps by pulling a rope tied to a wheel or whatever. We have the energy to get there. Of course, it is a fraction of the overall energy in the system. When we get to notions like that, we must count a lot more. Nonetheless, some cosmological models require a type of negative gravitational potential energy to make total energy conservation work. According to such views, nearly all of the universe's mass condensed out of the vacuum to offset the negative energy associated with the inflationary epoch. As a result, the universe's total energy is zero. It is not the sole hypothesis, but it is useful in that it answers the issue of why there is something rather than nothing. It would imply that there is nothing completely, but it is unevenly dispersed. One of the two major forms of energy is potential energy. Potential energy is the amount of energy that an object can hold. It is the power that a thing has while it is not in motion. The potential energy of a moving item increases as it slows down. The object's capacity strength reduces as it accelerates. Potential energy is the electricity that occurs as a result of the relative locations (configurations) of the components in a physical machine. This energy form has the capacity to modify the state of other things around it, such as the configuration or movement. Potential energy encompasses a wide range of energy kinds.
The best and closest definition of "biodiversity" would be?
a) a member within a population
b) a single organism in a community
c) all of the different species of living things in a given area
d) the non-living components of an ecosystem.
What do plants need to survive and reproduce
It is very important that plants gets the right amount of basic needs to survive and reproduce. This is essential to humans as their main source of food is from plant.
Plants needs light, air, water, nutrients, and space to survive and reproduce. Plants gets their source of light from the sun, they use this light energy to produce glucose in the leaf.
Plants obtain air from the atmosphere, they derive water and nutrients from the soil to enhance their growth.
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An example of a wobble base is?
Answer:
The four main wobble base pairs which are:
guanine–uracil (G–U),hypoxanthine–uracil (I–U), hypoxanthine–adenine (I–A), hypoxanthine–cytosine (I–C).Choose any one of them.
PLEASE HELP. A stovetop burner on medium reaches 95°C. Which will also receive a flow of heat directly from the burner?
A. the surrounding air
B. a burner at the same temperature
C. a pan heated to 100°C
D. hotter water inside a pan
Answer:
Option C, a pan heated to 100°C
Explanation:
The pan on the burner will be in direct contact of the heat released by burner and hence the pan will receive the direct flow of heat from the burner.
However, the water is the pan will be heated by the heat transferred from the pan to the water in it. Water will not receive heat directly from the burner.
Hence, option C is correct
How many layers does a muscle fascicle have connective tissues
A muscle fascicle have three layers of connective tissues.
What are connective tissues?Connective tissues are tissues which connects layers of organs or tissues together.
A muscle us a type of tissue.
A muscle fascicle have three layers of connective tissues called:
epimysium, perimysium, and endomysiumTherefore, a muscle fascicle have three layers of connective tissues.
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What would happen if you changed the temperature and ph around the enzyme?
However, extremely high temperatures can cause an enzyme to lose its shape (denature) and stop working. pH: Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity. Extreme pH values can cause enzymes to denature.
If the temperature and pH around an enzyme is changed, the enzyme would likely denature. Details about enzymes can be found below.
What is an enzyme?Enzymes are biological catalyst that regulates the rate of biochemical reactions in living cells.
Enzymes function at a particular temperature and pH and can easily get denatured i.e. alter its original form.
This suggests that if the temperature and pH around an enzyme is changed, the enzyme would likely denature.
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Robert Hooke first observed cork under a microscope in jail so he named the small cubicles cells
False True
Answer:
False
Explanation:
The statement is false. Though "Robert Hooke" was the first person to observe cork under microscope. He named the small cubicles cells because it used to remind him of the cells in the monastery (a place for monks).
Answer:
False
Explanation:
RobERT Hooke observed the cork first and names the particles as cells .
But he did that in Monastery not jailHence the statement is false
Which layer of the dermis houses the nerve endings that are sensitive to touch and pressure?.
Answer:
Reticular layer
Explanation:
30. 9) To complete this Venn Diagram, label the following cell parts as A (Prokaryotic), B (common to both) or C (Eukaryotic) characteristics:
A B C
Prokaryotic
Eukaryotic
capsule
flagella
cell wall (incl. plants)
cytoplasm
cell membrane
nucleus
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Answer: Capsule : A
Flagella: A
Cell Wall: B
Cytoplasm: B
Cell membrane: B
Nucleus: C
Explanation: got this question correct on my lesson. Hope this helps, if you are in Visions, best of luck to you from another fellow vision student.
Since each myofibril is attached at either end of the muscle fiber, when sarcomeres shorten, the muscle fiber.
Each myofibril is attached at either end of the muscle fiber, when sarcomeres shorten, the muscle fiber Shortens
Mechanism :
Myofibrils are components of the animal skeletal muscles that are made up of sacromeres. They perform the muscular contraction and relaxation via the sliding filament model.
To produce motion, A cross-bridge forms between actin and the myosin heads triggering shortening of the sacromere. This shortening of the sacromere results in the contraction of the muscle fibers, which the net effect can be seen to be a shortening of the fibers.
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Which of these factors causes populations to compete?
A. Continuous migration
B. Low population densities
C. Limited resources
D. High death rates
The _____________ is composed of a vast system of microscopic tubules that communicate directly with the capillaries to filter the blood.
The glomerulus is composed of a vast system of microscopic tubules that communicate directly with the capillaries to filter the blood.
What are functions of glomerulus?The glomerulus is the network of small capillary blood vessels which is found embedded within the bowman's capsule of the kidney.
The functions of glomerulus include the filtration of blood to remove the following:
wastesdrugs andexcess water.Therefore, the glomerulus is composed of a vast system of microscopic tubules that communicate directly with the capillaries to filter the blood.
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Which correctly describes crossing over?
the process whereby non-sister chromatids exchange genetic material
the process whereby homologous chromosomes are pulled to opposite poles of the cell
the process whereby sister chromatids are pulled to opposite poles of the cell
the process whereby homologous chromosome pairs align randomly along the metaphase plate
The correct option is A ie the process whereby non-sister chromatids exchange genetic material
Between prophase I and metaphase I, a process known as crossing over occurs in which two homologous non-sister chromatids join up and exchange various pieces of genetic material to create two recombinant chromosome sister chromatids.When genetic material is switched between two chromosomes, this process is known as crossing over.It is in charge of causing genetic variation among members of a species.Only the reproductive cells known as gametes undergo this process.The steps involved in crossing over are as follows:1) Synapsis.
2) Chromosome duplication
3) Crossing over.
4) Terminalizataion.
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Answer: A.) the process whereby non-sister chromatids exchange genetic material
Explanation: trust
_____provides a visual tool to show any health related traits that were passed down through generations
The visual tool that is used to show any health related traits that were passed down through generations is; Pedigree Chart
What is a pedigree chart?There are different means to try to medically check some historical genetics from one generation to another.
However, in this case of a visual tool, the only one we can use is called a pedigree chart. This is because a pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors from one generation.
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Which characteristic of life is being shown by the following image?
O Organisms react to stimuli
O Organisms grow and develop
O Organisms can adapt
O Organisms are made up of cells
O Organisms can use and obtain energy
Answer:
d
Explanation:
organisms are made up of cells
What embyonic germ layer gives rise to nervous tissue?
The embryonic germ layer that gives rise to nervous tissues is the ectoderm.
Embryonic layersThere are 3 types of embryonic layers for triploblastic animals:
The endoderm: this develops into the gut and other internal organs.The mesoderm: this develops into muscle cells and connective tissuesThe ectoderm: this develops into nervous tissues and epidermisMore on embryonic layers can be found here: https://brainly.com/question/9599868
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The ________ communicates with the lower bladder to enable excretion of urine from the body.
The urethra is an organ which communicates with the lower bladder in order to enable excretion of urine from the body of a living organism.
What is an excretory system?An excretory system refers to a living system that is saddled with the responsibility of removing waste products from the body of a living organism, so as to prevent damage to the body and help maintain homeostasis.
Based on scientific information, the urethra is an organ which communicates with the lower bladder in order to enable excretion of urine from the body of a living organism.
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Which of the following could result in secondary succession?
the formation of a tall sand dune on a previously grassy beach
a vast glacier in motion forming a U-shaped valley in its wake
a volcanic eruption that covers most of what used to be a forest
an introduced species that destroys all the native plants in an area.
The answer is D. An introduced species that destroys all the native plants in an area.
Reviewing Meiosis:
1. How many cells are present and how many chromosomes are present in the cell at each stage?
start of Meiosis____
end of Meiosis 1_____
end of Meiosis 2____
1. How many cells are present and how many chromosomes are present in the cell at each stage?
start of Meiosis a parent cell that is diploid
end of Meiosis 1 when the chromosomes of each homologous pair arrive at opposing poles of the cell.
end of Meiosis 2 four haploid daughter cells
How many instances of cell-cell communication are involved in the motor component of a visceral reflex arc?.
Two instances of cell-cell communication are involved in the motor component of a visceral reflex arc.
What is a visceral reflex arc?The visceral reflex arc can be defined as a part of the autonomic nervous network required during involuntary muscle responses.
The visceral reflex arc involves afferent sensory neurons and the stimulation of postganglionic neurons to target cells.
In conclusion, the number of cell interactions in the visceral reflex arc is equal to two (2).
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