Different types of cells look and function differently, the basis for these differences is DIFFERENT PATTERNS of gene expression. This process (differential gene expression) leads to cell specialization.
Gene expression refers to the process by which the genetic information flows from a DNA sequence (i.e., a gene) to an mRNA molecule and finally to a protein.
In somatic (body) cells, the differential patterns of gene expression lead to the generation of different proteins and ultimately to different types of cells (cell phenotypes).
In consequence, cells are specialized to perform specific functions because different genes are being expressed.
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The virus best known for causing mononucleosis, which is also suspected of contributing to Hodgkin's disease, is called
(ii) Two grey mice, when mated, produced a total of 8 white, 9 black and 17 grey offspring. Student A suggested that grey coat colour was dominant in the mice. Student B strongly disagreed Which student is right? Explain your answer using appropriate symbols (4 marks)
_____ mimic the process of natural evolution to generate solutions to optimization and search problems.
Search algorithms are used to generate solutions to optimization and search problems.
Search algorithms that mimic the process of natural evolution. Search algorithms can be used to generate solutions to optimization and search problems using techniques such as mutation, selection, crossover, and chromosome.
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1. Describe how chemical changes
are
different from physical changes.
Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
Explanation:
Answer:
In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. In a chemical change, the kind of matter changes, and at least one new substance with new properties is formed.
Explanation:
Physical changes are limited to changes that result in a difference in the display without changing the composition.
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Please help!
Peter is pushing the rock but the rock is not moving. Choose the statement that describes the force(s) being applied in the image.
a boy pushing a rock, but the rock is not moving
The force of the push is an unbalanced force.
The forces acting on the rock are balanced.
A weaker force of pushing would result in unbalanced forces.
The force of gravity is pulling the rock upwards.
Answer:2b
Explanation:
What part of a plant cell responds to turgor pressure? *
Answer:
Cell wall. The plant cell wall accounts for the turgidity and the rigidity in plants. The cell wall protects the plant cell from bursting due to the influx of water. Rather than bursting, the cell is able to withstand the osmotic pressure exerted by the water molecules.
PLEASE HELP ME IM TIMED!
Answer:
D
Explanation:
Actually fat is the best source of energy, since it is time consuming to break down a molecule of fat, carbohydrate is now used as an alternative to that since the molecules are broken down quicker.
You live in Florida, and you have decided to prepare your home for hurricane season. Which of the following actions would least help you achieve your goal?
A) purchasing a battery-powered cell phone charger
B) storing several gallons of water in closed, plastic containers
C) replacing your wooden front door with a door made of glass
D) filling your pantry with canned goods and other non-perishable food items
Answer:
D) filling your pantry with canned goods and other non-perishable food items
Cyanidin is a compound that is sensitive to pH. Cyanidin is found in plants such as hydrangeas, cornflowers, and the vegetable rhubarb. Cornflowers are blue because the cornflowers sap is basic and cyanidin turns blue in the presence of bases. Rhubarb contains an acid called oxalic acid. This affects the cyanidin and causes the red color found in rhubarb. Other plants that contain cyanidin are cherries, raspberries, and strawberries. What does the above information infer about cherries, raspberries, and strawberries?
Answer:
their colours are basically on the acidic and basic content of their cell sap in reaction with the cyanidin
the auditory ossicles transmit vibrations from the
Answer:
tympanic membrane across the middle ear.
Explanation:
The tympanic membrane across the middle ear to the oval window of the inner ear.
Which chromosome pair shows gender?
1
15
22
23
Answer:
23
Explanation:
. Tay-Sachs disease is a human genetic condition where cells build up with large, complex, and undigested lipids. Which organelle must be malfunctioning (not working) in this condition
Answer:
lysosomes
Explanation:
missing lysosomal enzyme
What is the term for the congenital absence of the urinary bladder?
Answer:
Urinary bladder agenesis
Explanation:
Bladder agenesis may be the result of secondary atrophy of the urogenital sinus, perhaps owing to the lack of distension with urine caused by failure of incorporation of the mesonephric ducts and ureters to develop into the trigone.
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Would a plant be able to survive if the ground tissue was damaged? Explain your answer.
Given what we know, we can confirm that with damaged ground tissue, a plant will most likely not be able to survive.
What we know about ground tissues in plants.The ground tissue forms an abundant part of all plant tissues. This tissue includes all plant tissue that is neither vascular nor dermal.This means that ground tissue covers a wide variety of functions. Two primary and important functions are the storage of sugar and water.Therefore, given the vital role of this tissue in plants and its function in storing "food" and water, we can confidently say that a plant with damaged ground tissue will not be able to survive for long.
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Answer:
No, it would not because...
Explanation:
A plant without ground tissue would not be able to survive. The ground tissue serves all types of functions, including photosynthesis, storage, and support. Without any of these functions, a plant can’t grow nor get the nutrient it needs to survive.
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Match each part of the kidney with the correct label.
Kidneys are externally surrounded by a three-layer capsule, and internally composed of the cortex, medulla, and pelvis. In the image, 1) Cortex, 2) Medulla, 3) Sinuses , 4) Capsule.
What are the kidneys?
The kidneys are bean-shaped, bilateral urinary organs located at each side of the vertebral column, under the ribs, and behind the abdomen (superior right and left abdominal quadrants).
Their main function is to filtrate blood, eliminate wastes and water excess through urine, and keep internal homeostasis.
When blood enters the kidneys, water, salts, and other waste substances are eliminated as urine, and the filtrated blood returns to the organism.
Kidneys are composed of different parts.
Externally,
Renal fascia ⇒ External layerRenal fatty capsule ⇒ Media layerRenal fibrous capsule ⇒ Internal layer
Internally,
the renal cortex ⇒ produces erythropoietinrenal medulla ⇒ contains nephrons, which filtrate blood and produce urine.renal pelvis ⇒ ilion
The medulla is arranged as pyramidal masses composed of tubular structures. In between the pyramids, there are renal papilla and calyces.
1) Cortex
2) Medulla
3) Sinuses
4) Capsule
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Help me please!!! Which hot spot is it? Left, 1st middle, 2nd middle, or Right?
Answer:
Left side
Explanation:
The mitochondria
The Krebs cycle or citric acid processes in the mitochondrial matrix yield a substance called NADH. Adenosine triphosphate is then produced from NADH by enzymes included into the mitochondrial inner membrane (ATP).
What is the main role of mitochondria in nutrient energy?Organelles, or “tiny organs,” are what mitochondria are. They generate ATP (adenosine triphosphate), a chemical that is used by the cell to power the various tasks it must perform, as a source of energy.
The creation of cellular ATP by oxidative phosphorylation is undoubtedly one of the activities of mitochondria, but they also play significant roles in ion homeostasis.
Various metabolic pathways, apoptosis and programmed cell death, as well as the production and consumption of ROS.
Therefore, mitochondria transform nutrient material into an energy form that is used by the cell.
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a critical event in the death of a cell is caused by
Answer:Apoptosis and autophagy are both forms of programmed cell death. Necrosis is the death of a cell caused by external factors such as trauma or infection and occurs in several different forms.
Explanation:
materials are cycled out by the chloroplast and mitochondrion
Carbon dioxide, Water, Sugar And Oxygen.
which statement is not true about electrical synapses?
Does human intervention affect small-scale ecosystems differently than large-scale ecosystems?
two pieces of information along with their sources
Answer: No
According to BBC, Human activities such as harvesting plants and hunting animals can unbalance the flows and cycles within those [SMALL SCALE ECOSYSTEMS ]ecosystems. Tree-felling may lead to soil erosion and a loss of habitat. Lack of shade and moisture in the soil can result in desertification.
According to National Geographic, Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.
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what molecule that is created during photosynthesis is stored by the plant as energy for later use?
Glucose.
................
What is the job of the enamel on your teeth?
Explanation:
Enamel helps protect your teeth from chewing, biting, grinding, crunching, and so on. Enamel also serves to sort of protect the teeth from potentially harmful temperatures and chemicals.
Why do the hydrogen ions and the hydroxide ions form bonds to make macromolecules?
Pick One of the Following:
A. They both have protons that attract to each other.
B. They each have an electrical charge that attracts to each other.
C. They both have electrons that attract to each other.
Answer:
A i think
Explanation:
Breathing is also known as which of the following?
*Ventilation
Internal respiration
External respiration
Gas exchange
Answer:
a. Ventilation
Explanation: post protected
in which phase of the cell cycle do cells check to determine whether the dna is fully and correctly replicated?
Answer:
at the end of G2
Explanation:
why is Ten dollars and Ice not a kinetic energy ?
Answer: They aren't kinetic energy
Explanation: They are not because it is either motionless or at rest.
in the presence of a regulatory protein the lac operon is _____.
Answer:
The correct answer is : B. not transcribed
Explanation:
The regulatory protein of the lac operon is a repressor. A operon is a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway. The genes of an operon are sequentially ordered after the promoter.
What is the condition in a male in which the prostate gland enlarges and compresses the urethra, causing bladder, kidney, and urinary problems?
Answer:
b. Prostatic hyperplasia
Explanation:is correct
When muscle tissue is exercising under anaerobic conditions, the production of ______ is important because it ensures a continuous supply of NAD
Given what we know about the biological mechanisms behind anaerobic exercise, we can confirm that the production of lactate ensures a continuous supply of NAD.
In order for us to undergo any physical exercise, it is imperative that we are able to produce energy within our cells. The energy used by cells is in the form of a molecule by the name of ATP, which is produced primarily through a process known as Glycolysis.
This is relevant given that in order for glycolysis to happen, a key protein is required known as NAD+. Lactate is produced from pyruvate only under anaerobic conditions because these are conditions that lack oxygen which is the only other source of NAD+, therefore, pyruvate must be converted to lactic acid to make it possible to continue glycolysis and the production of ATP.
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Biology A Semester Exam
4 of 284 of 28 Items
You find a blog post written by a student on a university website about photosynthesis. Assess the reliability of this source.(1 point)
It may be reliable because the blog has been featured on a popular website.
It may be reliable because they cited multiple high-quality studies from scientific journals.
It may be reliable because other students verify the information in the blog.
It may be reliable because they cited other student blogs.
A student's post on photosynthesis can be reliable because he cited multiple high-quality studies from scientific journals.
When we research to show that a hypothesis or idea is true, we need to give it reliable support so that people who read our research trust the conclusions of our research, and it is considered as true knowledge.
To give reliable support to an investigation, it is necessary to resort to feasible arguments or true knowledge developed by researchers and specialists. For this, we must consult sources of reliable information.
Examples of reliable sources of information are:
International scientific journalsUniversity researchProven scientific evidenceSpecialized booksAccording to the above, what the student must do so that his publication is reliable for other students is to cite reliable sources so that the knowledge he is sharing is reliable.
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Answer:
IT may be reliable because they cited multiple high-quality studies from scincetific journals
Explanation:
Well, we know that this person knows their stuff and has been helpfull to others in the past!
let's give an example of a man, Jorge who has a reputation for helping others and donating to charity.
Tomorrow you're leaving for a week on a business trip and you need someone to watch your house, that is one truthful and is trusting.
We have Bob down the street that is a bloger and has many followers.
The mailman, Carson that everyone likes.
someone random online will watch the house.
Are you going to trust Jorge- the person who helps everyone
Bob- the bloger
Carson-the mailman or,
Someone random- watches houses, 30 bucks a day
YOUR GONNA TRUST JORGE!! Because he is the reliable and truthful man!
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