Answer:
The sliding filament theory is the explanation for how muscles contract to produce force. As we have mentioned on previous pages, the actin and myosin filaments within the sarcomeres of muscle fibres bind to create cross-bridges and slide past one another, creating a contraction.
Explanation:
this answer is helpful
watson and crick were the first to suggest that dna is
Answer:
they suggested that DNA could make exact copies of itself
Explanation:
The two had shown that in DNA, form is function: the double-stranded molecule could both produce exact copies of itself and carry genetic instructions.Watson and Crick developed their ideas about genetic replication in a second article in Nature.
If predators A and B prey upon the same species and predator A is eliminated, the population of predator B will likely __________.
a.
be eliminated
b.
increase
c.
decrease
d.
remain the same
Please select the best answer from the choices provided
Answer:
b
Explanation:
since predator seems to have the upper hand the predator a will most likey not be able to have any prey causing the preadotors b to inrease
Answer:
It's B
Explanation:
heparin is a naturally occuring anticoagulant produced by
Heparin is a naturally occurring glycosaminoglycan produced in the body by basophils and mast cells
What is an argument in favor of using embryonic stem cells over adult stem cells?
A. Embryonic stem cells can differentiate into many more types of cells.
B. Embryonic stem cells are never really living.
C. Adult stem cells cannot be cultured.
D. Adult stem cells reproduce much faster than embryonic stem cells.
Answer:A
Explanation:
The ES cells is pluripotent, and the adult stem cell is unipotent.
how is carbon dioxide produced in a cenent plant
A cooler area appearing from time to time on the sun's surface, appearing dark by contrast with its surroundings.
Answer:
Are you talking about a sunspot?
Explanation:
males are more often affected by x-linked traits than are females because ________.
Answer:
A male with a mutation in a gene on the X chromosome is typically affected with the condition. Because females have two copies of the X chromosome and males have only one X chromosome, X-linked recessive diseases are more common among males than females.
Explanation:
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Can someone pls help me with this 2 questions!!
Answer:
water contracts and ice sinks
Answer:
For #2, water expands when it freezes, therefore it floats!
Explanation:
Water first condenses when it freezes until it reaches about 4 degrees Celsius, where it then slowly expands by about 9%. It also floats! You can observe this yourself by placing ice into a glass full of water.
Ice floats because it is less dense than the water below.
where do daughter cells come from
Explanation:
Daughter cells are cells that result from the division of a single parent cell. They are produced by the division processes of mitosis and meiosis. Cell division is the reproductive mechanism whereby living organisms grow, develop, and produce offspring.
How are the amounts of carbon dioxide and oxygen inhaled by lungs different from the amounts exhaled? How do cellular respiration and the law of conservation of mass relate to this?
I NEED HELP!!
Answer:
1. Gas exchange takes place by diffusion in the alveoli within the lungs. As a result the composition of inhaled and exhaled air is different.
...
Inhaled and exhaled air.
Gas % in inhaled air % in exhaled air
Oxygen 21 16
Carbon dioxide 0.04 4
Nitrogen 79 79
NB These figures are approximate.
2. The amount of carbon-dioxide atoms released by respiration are exactly equal to the atoms of these materials contained in the oxygen and carbon converted. In this way respiration has conserved the mass or material and in this way followed the law of conservation of mass.
Explanation:
What is Cellular Respiration?
Cellular Respiration is the process in which the cells of living things break down the organic compound glucose with oxygen to produce carbon dioxide and water. The overall chemical equation for cellular respiration is:
C6H12O6 + 6O2 → 6CO2 + 6H2O + energy (stored in ATP)
Cellular respiration takes place in the cells of all organisms. It occurs in autotrophs such as plants as well as heterotrophs such as animals.
Q: How is cellular respiration related to breathing?
A: Breathing consists of inhaling and exhaling, and its purpose is to move gases into and out of the body. Oxygen needed for cellular respiration is brought into the body with each inhalation. Carbon dioxide and water vapor produced by cellular respiration are released from the body with each exhalation.
Energy Changes in Cellular Respiration
The reactions of cellular respiration are catabolic reactions. In catabolic reactions, bonds are broken in larger molecules and energy is released. In cellular respiration, bonds are broken in glucose, and this releases the chemical energy that was stored in the glucose bonds. Some of this energy is converted to heat. The rest of the energy is used to form many small molecules of a compound called adenosine triphosphate, or ATP. ATP molecules contain just the right amount of stored chemical energy to power biochemical reactions inside cells.
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what happens when layers of rock with different densities collide?
Lesson 3.01 (Page 1) talks about the different kids of ecosystem
succession.
If primary succession occurred would turtles be able to nest there?
What about secondary succession? (hint: what is the difference
between the 2?)
Answer:
In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance.
Explanation:
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Marco has experienced extreme fatigue (tiredness) lately. He eats three balanced meals each day and exercises 2-3 times per week on his Peloton bike. He gets 7-8 hours of sleep each night, but just can’t seem to stay awake during the day. Which organelle is most likely causing Marco’s problems?
Given the symptoms shown by Marcos, we can infer that the organelle that may be causing his problems is the mitochondria.
The mitochondria are one of the most famous and important organelle within a cell. Found in most eukaryotic cells, they are the organelle responsible for most of the energy production of a cell, and throughout the cells of the body, they become responsible for the energy production of the organism. This is the origin of its famous "Powerhouse of the cell" title. Mitochondria produce energy in the form of ATP.
ATP is a molecular compound necessary for most of the reactions that take place in a cell. It is so common as a requirement for any cellular activity that ATP is known as the "molecular currency". Marcos is said to be experiencing chronic fatigue, which is a symptom of mitochondrial disease. When the mitochondria of an organism's cells are not functioning as they should be, the cells do not have the energy needed to perform basic functions.
In reaction to this, the body sends signals to the brain to go to sleep, which minimizes energy consumption by slowing down the metabolic processes which require ATP and thus gives the body time to produce more energy. For these reasons, we can conclude that the fatigue and problems Marcos is experiencing are due to mitochondrial disease.
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Someone please help me with this question
the appearance changes but the identity does not
which is true of the anterior horns of the spinal cord?
Answer:
They house cell bodies of somatic motor neurons.
Explanation:
each anterior root and corresponding posterior root unite within the intervertebral foramen to become a spinal nerve
What was the Court’s decision in United States v. Nixon (1974) and how did the decision uphold the idea that even the President of the United States is not above the nation’s laws?
Answer:
The Supreme Court decided that the President was required to turn over tape recordings and other materials that had been subpoenaed by special prosecutor Leon Jaworski.
In trying to withhold some materials related to the Watergate investigation, Nixon's lawyer had argued that the President of the United States "is not subject to the processes of any court in the land except the court of impeachment." The Supreme Court disagreed, in unanimous fashion. They held that the President could not use executive privilege as an excuse for hiding wrongdoing or avoiding prosecution. In an interview some years after his resignation, Nixon still held to his view, claiming that when the President does something, "that means that it is not illegal." He felt that being in the position of President put him above the law. But the Supreme Court had firmly disagreed. They rejected the idea of "absolute, unqualified Presidential privilege of immunity from judicial process under all circumstances." Executive privilege can only protect matters of military or diplomatic confidentiality
Look at structure A Use the drop downs to answer the questions about this structure What is the name of this part of the flower What is the function of this part of the fower? A
Answer:
What is the name of this part of the flower?
✔ sepal
What is the function of this part of the flower?
✔ to enclose the flower bud
Answer:the person above me is right.
Explanation:
which unit of geologic time began 65.5 million years ago and continues to the present?
What is so interesting about the hydrothermal vent system?
Answer:
They support unique ecosystems and their communities of organisms in the deep ocean. They help regulate ocean chemistry and circulation. They also provide a laboratory in which scientists can study changes to the ocean and how life on Earth could have begun.
Explanation: hey are old, preserve a lot of old organisms, and help the ecosystem
Use the information to answer the following question.
1. tRNA brings the correct amino acid specified by the mRNA codon
2. DNA is used as a template to create mRNA, which leaves the nucleus
3. Amino acids are bonded together to make a polypeptide (protein)
4. mRNA molecule binds to a ribosome
5. The ribosome releases both the mRNA molecule and the polypeptide (protein)
Which of the following demonstrates the correct sequence of events that occurs during protein synthesis?
A. 2, 4, 1, 3, 5
B .2, 4, 3, 5, 1
C. 1, 2, 3, 4, 5
D. 4, 2, 1, 5, 3
Answer:
The correct sequence of events that occurs during protein synthesis? A
Explanation:
2. DNA is used as a template to create mRNA, which leaves the nucleus
4. mRNA molecule binds to a ribosome
1. tRNA brings the correct amino acid specified by the mRNA codon
3. Amino acids are bonded together to make a polypeptide (protein)
5. The ribosome releases both the mRNA molecule and the polypeptide (protein)
During protein synthesis, all the machinery for synthesis occurs in a sequential manner and the first need is a DNA template, so the correct option is a.
What events occur during protein synthesis?Protein synthesis occurs in the ribosomal machinery and the process is called translation and starts after transcription.
DNA acts as a template for transcription and makes mRNA which translates into protein. mRNA act as a messenger for protein synthesis, this mRNA converts into protein with the help of ribosomal machinery.
In the process tRNA act as an adapter molecule adding an amino acid to the protein chain according to the codon on mRNA. In the last step protein and mRNA are released by the ribosome.
Therefore protein synthesis starts with DNA, hence option a is correct.
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Which of the following describe ways septic tanks potentially contaminate drinking water?
I. Using septic tanks in rural areas
II. Rising sea levels near coastline septic tanks
III. Leaks from septic tanks into groundwater
I and II
II and III
I and III
I, II, and III
Answer:
lll and ll
Explanation:
Answer:
| and ||
Explanation:
Where are the tube like structures that connect fungi cells?
Answer:
What are Hyphae
Explanation:
Hyphae are long tubular structures resembling garden hoses. ... Hyphae perform a variety of functions in fungi. They contain the cytoplasm or cell sap, including the nuclei containing genetic material. Hyphae absorb nutrients from the environment and transport them to other parts of the thallus (fungus body).
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Miss Hawaii
the connective tissue covering around a fascicle is the
Answer:
a layer of connective tissue called the perimysium.
Explanation:
6. The anterior muscles and tendons of the forearm do what action?
Answer:
The main action of pronator teres is pronation of the forearm at the proximal radioulnar joint, while it also contributes to the flexion of the forearm at the elbow joint. Start with the anatomy of anterior forearm muscles by exploring our videos, quizzes, labeled diagrams and articles.
8. What muscle is immediately medial to the brachioradialis?
the thin strand of pia mater that helps to anchor the spinal cord to the coccyx is the
Answer:
filum terminale
The filum terminale is a thin strand of pia mater that helps anchor the conus medullaris to the coccyx
how does one chromatid compare to its sister chromatid?
Answer:
One chromatid compares to its sister chromatid because when a chromatid is replicated, a sister chromatid is formed. The sister chromatid will be a genetically identical copy to the chromatid because the cell being replicated will also be genetically identical.
in an otherwise normal cell, what happens if one mistake is made during dna replication?
Answer:
Most mistakes are corrected, and if they are not, they may result in a mutation, defined as a permanent change in the DNA sequence. Mutations can be of many types, such as substitution, deletion, insertion, and trinucleotide repeat expansions. Mutations in repair genes may lead to serious consequences such as cancer.
Explanation:
in a typical animal, mitosis produces _________, while meiosis produces____________.
In a typical animal, mitosis produces two identical daughter cells, while meiosis produces four unique daughter cells.
Meiosis is a type of cell division that involves the parent chromosome being halved and then divided again to form four unique daughter cells which have only one copy of chromosome from the parent.
This process occurs in sex cells such as the sperm and egg cells.
Mitosis is also a type of cell division but occurs with the parent cells to form two identical daughter cells.
This type of cell division have produces the same number of chromosomes the parents have and occurs in cells of the body which undergoes growth or during replacement of worn-out tissues.
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during which checkpoint would damaged or improperly replicated dna halt progression through the cell cycle?
Answer:
G2/Growth 2 phase
Answer:
When a cell's DNA is damaged, a sensor protein activates p53, which halts the cell cycle at the G 1start subscript, 1, end subscript checkpoint by triggering production of a cell-cycle inhibitor. This pause buys time for DNA repair, which also depends on p53, whose second job is to activate DNA repair enzymes.