Answer: B. Start and stop codons
Explanation:
The start codon marks the site at which translation into protein sequence begins, and the stop codon marks the site at which translation ends.
Answer:
b) Start and stop codons
Explanation:
The translation process know where to start and stop by Start and stop codons. Hence, the option (b) is correct.
How is it possible that muscle and fat cells make up 75% of human cells by weight but 84% of cells are red blood cells?
RBC’s make up about 84% of cells in the body, but they are only 4% of body weight. Whereas, 75% of total weight are fat cells and muscle cells. They’re both large cells but constitute only a minute fraction of the total number of cells.
How many cells is the human body made of?
The exact number of cells is still debatable. But to put it briefly, around 30-40 trillion. The long answer? Not yet determined.
What we do know, is that RBC’s (red blood cells) make up the majority of cells in our bodies. They make up only 4% of total mass, despite constituting 80% of all cells. The reason is that RBC’s measure 8 micrometers in diameter. The size of fat cells, however is around 100 micrometers.
The total number of cells to this date is still not defined, but we have a slight idea of what could be.
Therefore, the reason for RBC’s having 84% of cells and 75% of fat cells is their mass. RBC’s are only 4% of total weight because their measure is only 8 micrometers. Whereas fat cells are around 100 micrometers in diameter.
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Please help don’t understand
Answer:
I believe the answer is D
Explanation:
Rats are endothermic (warm blooded) animals. Explain why the physiology of a perch (an exothermic or cold blooded animal) would not support the metabolic needs of a rat.
They can readily adjust to any maximum temperature, allowing them to survive there. Rats were toasty endothermic animals. As a result, a rat's physiological needs wouldn't be met by the physiology of perches.
Animals having cold blood are those that are unable to adjust their internal body temperature in response to environmental changes. They are unable to endure high temperatures. Reptiles, fish, and other cold-blooded creatures are examples.
Animals with warm blood were those that have the ability to control and maintain a consistent body temperature. They could readily adjust to just about any temperature range, allowing them to survive there. Rats were warm-blooded endothermic animals. As a result, a rat's physiological requirements would not be met by the physiology of such a perch (an exothermic as well as cold-blooded species).
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what is the density of lions (in lions/km2) in the portion of the park that has been studied
The density of lions per each km² in the portion of the park that has been studied is 0.05125 lions/km², i.e., in this case this value equals to 41 lions/800 km².
What is the population density?The population density in a natural population can be obtained by dividing the number of individuals or organisms of a given species per unit of surface area in the ecosystem under study.
In this case, the studied area is 800 km² because it represents 20 percent (i.e. 20%) of an area that has 4000 km², while the number of lions in this area represents the population density and can be obtained as 41 lions/800 km2 >> 0.05125 lions per km².
Therefore, with this data, we can see that the population density is associated with the number of organisms of the same species in a given geographic area, which is generally referred to as the number of individuals per km².
Complete question:
The lion researchers in the film have studied 20% of the park and identified 41 lions. The entire Gorongosa Park is 4,000 km2. What is the density of lions (in lions/km2) in the portion of the park that has been studied?
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What makes the rough ER
considered "rough"?
A. the ribosomes that are attached this
B. the presence of bacteria
C. the folds in the membrane
Option A. Because of the attached ribosomes, the rough ER is considered "rough."
When viewed through an electron microscope, the rough endoplasmic reticulum (RER) appears studded due to the ribosomes attached to its cytoplasmic surface.
The rough endoplasmic reticulum is primarily composed of sheets, which are a two-dimensional array of flattened sacs that span the cytoplasm. These membranes contain an important protein complex called the translocon, which is required for protein translation within the rough ER in addition to ribosomes.
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Answer:
a) the ribosomes that are attached
Explanation:
The ribosomes that are attached makes the rough ER considered "rough". This is also called as RER. Therefore, the option (a) is the correct answer.
Which is NOT a
characteristic of
saturated fats?
A. They are less healthy than
unsaturated fats.
B. They are gases at room
temperature. This
C. They are saturated with
hydrogen.
D. They are liquid at room
temperature.
Answer:
They are liquid at room
temperature.
What do we call the cells in
phloem that are alive at
maturity, but lose almost all
of their organelles?
Tracheids
Sieve-tube this
Sieve elements are the phloem cells that are still alive when they reach adulthood but have essentially no organelles left.
Sieve elements are alive at maturity but lack some organelles, such as a nucleus, in comparison to tracheary elements, which have just primary cell walls (and consequently thicker overall cell walls).
Thin-walled cells called sieve elements typically don't have nuclei but are nonetheless alive at maturity despite having a significantly altered protoplast. .The primary walls of parenchyma cells are thin, and they typically continue to live after reaching maturity. The primary type of elongated photosynthate-conducting cell in vascular plants' phloem is known as a sieve element. Sieve regions, which are thinner, circular to elliptical portions of the wall, are present in the walls of sieve elements.
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which new gene formation does fit to ortholog type of homology in evolution?
Gene duplication is a new gene formation phenomenon that fits the ortholog type of homology in evolution.
What is homology in evolution?The expression homology in evolution makes reference to the emergence of similarities between two or more sequences due to a common origin, which may occur as a consequence of gene duplication and subsequent divergence of ortholog sequences in order to play different roles as genetic material in the cell of an organism.
Therefore, with this data, we can see that homology in evolution is caused by similarities due to a common ancestor and it may be due to gene duplication.
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PLEASE HELP WILL GIVE BRAINLIEST
Answer:
122+293
773
because you are you still
Answer:
Notothenioidei is one of 19 suborders of the order Perciformes. The group is found mainly in Antarctic and Subantarctic waters, with some species ranging north to southern Australia and southern South America.[2][3] Notothenioids constitute approximately 90% of the fish biomass in the continental shelf waters surrounding Antarctica.[4]
773 is answer
Which statement is true regarding a chemical reaction? (1 point)
O The total number of atoms does not change, so mass is conserved in the reaction.
O The total number of atoms changes, so mass is conserved in the reaction.
O Even if the total number of atoms does not change, mass may not be conserved in the reaction.
O Even if the total number of atoms changes, mass may not be conserved in the reaction..
Answer:B) The total number of atoms does not change, so mass is conserved in the reaction.
Explanation:According to the Law of Conservation of Mass, no matter can ever be created or destroyed. The number of atoms does not change, thus the mass does not change.
4 organelos celulares comparados con objetos cotidianos
Four cell organelles in living cells are: mitochondria, nucleus, ribosomes and endoplasmic reticulum.
What is meant by mitochondria, nucleus and ribosome?The mitochondria refers to that organelle found in the cytoplasm which is regarded as the power house of cells.
The nucleus is the organelle in the cell where all cellular activities are controlledThe ribosomes are the sites of protein synthesis.That being said, a cell is defined as the structural, functional and basic unit of life.
So therefore, it can be deduced from the task above that ribosomes and mitochondria are some of the few organelles in the cells of living organisms.
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In which type of cell do both DNA replication and cellular respiration take place in the cytosol?
- Animal cell
-Fungal cell
-Plant cell
-Bacterial cell
Both DNA replication and cellular respiration take place in the cytosol of a Bacterial cell.
What is a bacterial cell?
Small, single-celled organisms called bacteria exist. Nearly all areas of the world are home to bacteria, which are essential to its ecosystems. Some species can survive in environments with high pressure and temperatures. In fact, it's thought that there are more bacterial cells in the human body than there are human cells. Bacterial cells don't have a nuclear membrane therefore both DNA replication and cellular respiration take place in the cytosol. Hence, bacterial cells do both.
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What characteristics of the lungs of infants and small children creates increased risk of respiratory disorders
Answer:
The internal diameter of the airways in a child is smaller. Any inflammation or obstruction may cause more severe distress. In general, pediatric airways are smaller, less rigid, and more prone to obstruction. Children also have higher respiratory rates than adults making them more susceptible to agents in the air.
Explanation:
Challenges in sustainable development
can you explain this diagram.. I will mark you brainlist..
help... !!!!
Answer:
Explanation:
environment is first then society then economy
Select the correct answer. The energy entering this system is equal to the energy leaving the system. Based on the law of conservation of energy, how many units of energy are entering the system? Illustration of squared labeled system. The arrows on the right side line of the square and the bottom line of the square are pointing out with energy values 10 and 5 units. The arrow on the top line with question mark is facing into the square. A. 5 units B. 10 units C. 15 units D. 20 units
The units of energy entering and leaving the system total 15 units. (Option C)
Why do we have the above as the right answer?According to the rule of conservation of energy, "energy cannot be generated or destroyed; instead, it evolves from one form to another." Because you have not provided the given value, it is important to remember that the energy exiting the system equals the energy that entered the system.
In physics, energy is the quantitative quality that is imparted to a body or a physical system and is visible in the form of heat and light. The law of conservation of energy holds that energy can be transformed in form but cannot be generated or destroyed.
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Complete Question:
The energy entering the system is equal to the energy leaving the system. Based on the laws of conservation of energy, how many units of energy are entering the system?
5 units
10 units
15 units
20 units
The arctic fox is uniquely adapted to its environment with white fur for camouflage, a small nose and ears and warm coat to prevent heat loss and strong paws for running and hunting. Which statement best describes how the arctic fox population may have adapted « its environment over time?
A. Foxes were bred to meet human needs for white fur.
B. Foxes developed smaller ears and noses in response to their cold climate. They were able to survive and pass this trait on to their offspring.
C. Foxes changed their fur to white to hide from predators and disguise themselves from their prey. They were able to survive and pass this trait on to their offspring.
D. Variation existed in the traits of the fox population. Foxes with smaller ears and noses were able to stay warmer and were more likely to survive and reproduce to pass their genes on to offspring. Over time, the fox population showed a shift to smaller ears and noses.
Answer:
D. Variation existed in the traits of the fox population. Foxes with smaller ears and noses were able to stay warmer and were more likely to survive and reproduce to pass their genes on to offspring. Over time, the fox population showed a shift to smaller ears and noses.
Explanation:
Adaptation does not happen overnight, and humans didn't breed foxes to have white fur. Smaller ears and noses allow less exposure to the cold because of their smaller surface area, which prevents heat loss. Foxes with smaller noses and ears didn't die of hypothermia, which allowed them to survive and breed and pass their genes to their offspring.
Describe and list the contents of the dural sinuses, subdural space, and subarachnoid space.
(help needed asap. thank u so much) :)
Question5
a) What is the primary way that muscle force is controlled?
b) Describe this phenomenon and explain how this relates to changes in muscle
circumference.
Question6:
Which of these two types of muscle contractions (Isotonic, Isometric) is used in the body to promote joint stability? Briefly explain your reasoning.
Answer:
Q5 a) he nervous system controls muscle force by varying both motor unit recruitment and rate coding.
b) The central nervous system can increase the strength of muscle contraction by the following: Increasing the number of active motor units (ie, spatial recruitment) Increasing the firing rate (firing frequency) at which individual motor units fire to optimize the summated tension generated (ie, temporal recruitment)
Q6) isometric contractions are active in maintaining posture and maintaining bone and joint stability.
Examples and non examples of nucleus
Which part of the flower
contains the anther and
pollen grains?
A. petals
B. pistil
C. stamen this is answer
Answer:
The anther contains pollen grains. The anther is an oval-shaped sac located at the upper end of the stamen in which pollen is produced, stored, and later released from the plant. It can appear from light yellow to dark red so that they attract pollinators (honey bees) to flowers, and make reproduction in plants possible.
Explanation:
Answer: C, Stamen
Explanation:
Why is there a need for a student to get acquainted to different laboratory apparatus?
A student needs to get acquainted with different laboratory apparatuses because then they can prevent any error, accident, or hazard from happening.
While working in the laboratory, a student needs to know which apparatus is required to perform what experiment/function. They need proper practice so as to remember the specific job of every instrument.
For example, a student should know that they need to use a cover slip properly so that they can prevent any bubbles from forming on their slide while looking at it under the microscope. If they do, they potentially reduce the chances of error in their calculations.
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A. vascular tissue
B. ground tissue
C. nervous tissue
D. dermal tissue
Which of the
following is NOT a
tissue you would
find in a plant?
C
Nervous tissue is not found in plant instead they have some different system to respond to stimuli.
Biologists are aware that there are additional ways to process information in addition to our neurological systems and those of other animals, including fish. Plants can react to stimuli despite not having neural systems. For instance, when an aphid bites a leaf, the plant responds by sending an electrical signal from leaf to leaf instructing it to begin defending itself.
However, it's crucial to remember that a plant does not necessarily feel pain when it reacts to injury.
Plants lack nociceptors, the particular receptor types that are hardwired to respond to pain, in contrast to humans and other animals. They naturally lack the brains essential to convert such sensations into actual experiences since they also lack brains.
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The results in the table above show the percentage change in mass of the potato cylinders.
explain why the percentage change results are positive and negative.
The percentage change in the mass of the potato cylinders is both positive and negative because the concentrations of the sugar solutions differ.
OsmosisIn biology, osmosis refers to the movement of water molecules from regions of low solute concentrations or high water potentials to regions of high solute concentration or low water potential through a semi-permeable membrane.
Solutions with high solute concentrations as compared to the sap of cells are said to be hypertonic to the cells. The cells, will, therefore, lose water to hypertonic solutions.
Solutions with the same solute concentrations as cells are said to be isotonic to the cells. There is no net movement of water between such solutions and the cells.
Solutions with lower solute concentrations as compared to cells are said to be hypotonic to the cells. Such solutions lose water to the sap of the cells.
This is exactly what happened in the case of the solutions and the potato cylinders. Hypertonic sugar solutions will cause the potato cylinders to lose water and weigh less than their initial weights. This will return a negative percentage change in weight.
Hypotonic solutions, on the other hand, will cause the potato cylinders to gain water and weight more than their initial weights. This will return a positive percentage change in weight.
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Which model accurately represents how DNA replication functions? Explain.
Answer: the semiconservative one
Explanation: it desribes how dna replication works
The progressive series of changes that eventually produce a climax community on what was once a bare lava flow is an example of
Answer: primary succession is the correct answer
what is the meaning of cell division
Answer:
mitosis and meiosis.
Explanation:
There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells. Mitosis is a fundamental process for life.
Differentiate between the lysogenic and lytic cycles. (1 point)
Viral proteins are synthesized during the lysogenic cycle.
O The virus injects DNA into the host cell during the lysogenic cycle.
O The host cell is destroyed during the lytic cycle.
O The host cell copies its own DNA during the lytic cycle.
Differentiate between the lysogenic and lytic cycles The virus injects DNA into the host cell during the lysogenic cycle.
The lytic cycle includes the replica of viruses using a number cellular to fabricate greater viruses; the viruses then burst out of the cellular. The lysogenic cycle involves the incorporation of the viral genome into the host cellular genome, infecting it from inside.
Inside the lytic cycle, the viral genome does no longer comprise into the host genome. within the lysogenic cycle, the viral genome consists of into the host genome and stays there throughou The main difference among lytic cycle and lysogenic cycle is that lytic cycle destroys the host cell while lysogenic cycle does no longer spoil the host mobile
The primary difference between lytic cycle and lysogenic cycle is that lytic cycle destroys the host cell whereas lysogenic cycle does not destroy the host cell. Viral DNA destroys the host cell DNA and arrests the cellular features within the lytic cycle. but, in the lysogenic cycle, viral DNA may merge with the host.
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If a woman with normal vision that carried an allele for color blindness X N X n married a man with normal vision(XNY), what would be their possible offspring
examples and non examples of a isotope
Answer:
carbon-12, carbon-13 and carbon-14
Explanation:
this three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively.
If you go to the dermatologist and he or she removes a mole, what do you think is done with that tissue sample?
A doctor uses a circular tool to remove a small core of skin, including deeper layers (epidermis, dermis and superficial fat). Excisional biopsy. A doctor uses a small knife (scalpel) to remove an entire lump or an area of abnormal skin, including a portion of normal skin down to or through the fatty layer of skin. The mole is removed in a procedure under local anaesthetic. You will be given a local anaesthetic by injection at the place on your body where the biopsy will be taken from. The local anaesthetic may sting a little when it is injected, however, the skin will then go numb and the operation should be pain-free.
Explanation:Surgical excision:The dermatologist cuts out the entire mole and stitches the skin closed if necessary. Surgical shave: The dermatologist uses a surgical blade to remove the mole.