Answer:
The correct answer is - b Pressure in the atria is lower than in the ventricles.
Explanation:
The atrioventricular valves close when the pressure in the ventricles is more than the pressure in the atria. Which leads to the contraction of the papillary muscles to shut the leaflets of the valves,
When the ventricles relax, atrial pressure exceeds ventricular pressure, the AV valves are pushed open and blood flows into the ventricles. However, when the ventricles contract, ventricular pressure exceeds atrial pressure causing the AV valves to snap shut.
A) 5%
B)10%
C)50%
D)100%
how is the kenetic energy of the particles that make up a substance different after it changes state
Which planet will take the longest amount of time to orbit the sun? O Mars 0 Mercury O Jupiter O Earth
Answer:
Jupiter
Explanation:
Because the sun's gravity is weaker on the planet of Jupiter because it is far away.
(Really need help asap)
How can we, as a society of consumers, help fish stay a renewable resource?
A. Ban all fishing
B. All become vegan
C. Buy fish raised in fish farms
D. Buy aquariums
Answer:
Fish go brrrrrrrrrr
Explanation: The answer is C so we can refill the fish supply without directly harming the fish in the ocean
Answer:
I just took the test its C. Buy fish raised in fish farms.
Explanation:
An early winter frost preventing further growth in a tomato garden is an example of a. carrying capacity.
b.limiting factor
c. biotic factor.
d. indirect observation.
Answer:
b. a limiting factor
An early winter frost that stops a tomato garden's growth is an example of a limiting factor, hence option B is correct.
What is the limiting factor?Anything that limits the size of a population and slows or prevents its growth is referred to as a limiting factor.
Biologic factors including food, mates, and competition with other species for resources are some examples of limiting constraints.
the element that restricts the rate of reaction in any physiological process with lots of variables. the environmental component that has the greatest influence on population size restrictions. Many deer populations are constrained by a shortage of winter forage.
Therefore, winter frost that stops a tomato garden's growth is an example of a limiting factor, hence option B is correct.
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Which substance is a solid?
Answer:
walls
Explanation:
Answer:
Rocks? Im not sure what you mean.
What is the sentence of metastasize?
Which of the following extremes would an organism that lives in the intertidal zone not be subjected to?
high pressure
cold
salinity
desiccation (drying out)
Answer:
I believe your answer would be high pressure .
3.1 Air
3.2 Light
3.3 Temperature
3.4 Salinity stress
3.5 Desiccation stress
3.6 Predation
3.7 Wave action
Explanation: High pressure is the only factor that is not included in this chart of effects on organisms in the intertidal zone.
Prokaryotic and eukaryotic in common
Donald is trying to get through a door but his friend Goofy is blocking the way using 15 N of force. Donald finally pushes on the door with 20 N and gets through knocking Goofy out of the way. Solve for net force.
Answer:
5 N
Explanation:
Goofy is blocking the way with 15 N force and Donald was only able to knock Goofy off using a 20 N force. The net force would be the difference between the applied force of Donald and that of Goofy.
Hence,
20 N - 15 N = 5 N
The net force is, therefore, 5 N.
Help me with this please
Answer:
how do u wake up so early . cause i can't do that
Explanation:
The marine biologist from the nursery is planning to develop a large number of new coral polyps with large stinging tentacles. Identify the type of reproduction the marine biologist should use to develop the new coral and explain why this type of reproduction is preferable.
Answer:
Sexual reproduction.
Explanation:
Sexual type of reproduction used by the marine biologist in order to develop the new coral because variations in an organisms only be done with sexual reproduction. For producing new type of coral, the type of corals should be fused together in order to gain the desire characters in the organisms. So if the marine biologist want coral polyps with large stinging tentacles, sexual reproduction is the only way. From asexual reproduction, the offspring produce identical to parents so that's why we can't use asexual reproduction.
Someone please help with both please :(
all you need is in the photo
Answer:
It Provides an explanation of how life today could have originated from a single cell.
Explanation:
What is the third part of cell theory?
All cells come from pre-existing cells
All cells contain DNA
All cells contain a nucleus
All cells maintain homeostasis
Answer:
Explanation:
All cells come from pre-existing cells
what is an analogous structure
Answer:
Alternative Title: analogous structure. Analogy, in biology, similarity of function and superficial resemblance of structures that have different origins. For example, the wings of a fly, a moth, and a bird are analogous because they developed independently as adaptations to a common function—flying.
Explanation:
Which two substances are the products of photosynthesis?
A. Carbon dioxide and Glucose
B. Carbon dioxide and water
C. Oxygen and carbon dioxide
D. Oxygen and glucose
The two products of photosynthesis are oxygen and glucose.
What is photosynthesis?The process by which green plants make their own food in presence of sunlight, chlorophyll, carbon dioxide and water is called photosynthesis(6CO2 + 6H2O → C6H12O6 + 6O2).The end products of photosynthesis are oxygen and glucose.What is oxygen?It is a life supporting gas.21% of oxygen is present in air.What is glucose?"Glucose is the most abundant monosaccharide, a subcategory of carbohydrates."It is used as food by plants and some of them are stored as starch.We get this when we eat food.Hence, the correct option is d. Oxygen and glucose.
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The oceans have become increasingly acidic in recent years as the water absorbs more and more carbon dioxide
from the atmosphere. This increased acidity interferes with the ability of corals to maintain their skeletons. In
addition, an increase in water temperatures worldwide is causing coral bleaching, another condition that threatens
the health of coral reefs.
Based on this information, which of the following would most improve the health of coral reefs?
Reducing the use of fossil fuels since they emit CO2 that reacts in water
CO2+H2O-->H2CO3
The following would most improve the health of coral reefs is reducing the use of fossil fuels.
What kills corals?One of the biggest threats to coral reefs is the so-called "coral bleaching", a process that leads to the death of hundreds of corals around the world. The phenomenon occurs when the temperature of the water increases, due to natural causes, such as El Niño, or caused by man, such as global warming.
Scientists have created a device that innovates the technique of transplanting corals from the recovery of fragments with tissue loss. The device works as a kind of cradle, where the fragments are kept until they recover and grow.
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Which of these is the direct result of an error in the transcription of a DNA nucleotide
Amino acids do not bond to tRNA.
The nuclear membrane is ruptured.
A codon sequence is incorrect.
Transportation of mRNA does not occur.
The direct result of an error in the transcription of a DNA nucleotide is that a codon sequence will be incorrect. So the correct option is C.
What is transcription?The first step in the expression of a genetic code is called transcription. During gene expression, the information stored in the DNA is expressed in the form of proteins.
In transcription, DNA is utilized to produce RNA. The RNA molecule is the copy of the DNA's genetic sequence. The RNA copy produced by the process of transcription is called an RNA transcript.
This transcript has the required information for the construction of a polypeptide chain. But before the formation of proteins, a eukaryotic RNA transcript requires processing to be converted into mRNA.
The mRNA thus produced has codons for the formation of proteins. Each amino acid is a result of the translation of three codons.
Therefore, if there is an error in the transcription of DNA nucleotides, the codon sequence will be incorrect. The correct option is C.
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What does this Transcribe to? (NEED HELP) TACTTCACGAGTGAGACT
Balanced chemical equation for ethanoic acid
Answer:
Ethanoic acid (CH3COOH) belongs to the group of carboxylic acids and is commonly called as acetic acid.What caused the Himalyan Mountains?
Answer:
This immense mountain range began to form between 40 and 50 million years ago, when two large landmasses, India and Eurasia, driven by plate movement, collided. Because both these continental landmasses have about the same rock density, one plate could not be subducted under the other.
Explanation:
Answer:
This immense mountain range began to form between 40 and 50 million years ago, when two large landmasses, India and Eurasia, driven by plate movement, collided.
i learned this before
pls help what does this mean
Cattywampus I have no idea what it means
I. Am asking because it's for biology I need I will mark brainlist
Cattywampus means like tilted or not lined up perfectly. It’s basically a British slang word for crooked mate :)
Complete the statement. (two words) A machine can help a person to
Answer:
Pesistently:Efficiently
Explanation:
Please help :)
Will water move from the blood to the cell, or from the cell to
the blood?
Which has the higher concentration of water, the cell or the blood?
Does this require energy?
Is this active or passive transport?
Is this diffusion or
osmosis?
Does the blood cause a hypotonic or hypertonic environment for the cell?
What will more likely occur to the cell if the movement of water continues in the same direction,plasmolysis or cytolysis?
Explanation:
WATER WILL MOVE FROM THE BLOOD TO THE Cell
Cell
No it dosent require energy active
Osmosis
yes it dose have an enviorment
I will mark BRAINLIST this is not difficult
9. Summarize how transcription makes mRNA. A complete answer will include: gene, mRNA, sequence, nucleotides, complementary, RNA polymerase, base-pairing rules.
Answer:
Explanation:
Transcription is the first step in gene expression, in which information from a gene is used to construct a functional product such as a protein. The goal of transcription is to make a RNA copy of a gene's DNA sequence. For a protein-coding gene, the RNA copy, or transcript, carries the information needed to build a polypeptide (protein or protein subunit). Eukaryotic transcripts need to go through some processing steps before translation into proteinsThe main enzyme involved in transcription is RNA polymerase, which uses a single-stranded DNA template to synthesize a complementary strand of RNA. Specifically, RNA polymerase builds an RNA strand in the 5' to 3' direction, adding each new nucleotide to the 3' end of the strand.Transcription of a gene takes place in three stages: initiation, elongation, and termination. Here, we will briefly see how these steps happen in bacteria. You can learn more about the details of each stage (and about how eukaryotic transcription is different) in the stages of transcription article.
Initiation. RNA polymerase binds to a sequence of DNA called the promoter, found near the beginning of a gene. Each gene (or group of co-transcribed genes, in bacteria) has its own promoter. Once bound, RNA polymerase separates the DNA strands, providing the single-stranded template needed for transcription.Elongation. One strand of DNA, the template strand, acts as a template for RNA polymerase. As it "reads" this template one base at a time, the polymerase builds an RNA molecule out of complementary nucleotides, making a chain that grows from 5' to 3'. The RNA transcript carries the same information as the non-template (coding) strand of DNA, but it contains the base uracil (U) instead of thymine (T). [What do 5' and 3' mean?]Termination. Sequences called terminators signal that the RNA transcript is complete. Once they are transcribed, they cause the transcript to be released from the RNA polymerase. An example of a termination mechanism involving formation of a hairpin in the RNA is shown belowIn bacteria, RNA transcripts can act as messenger RNAs (mRNAs) right away. In eukaryotes, the transcript of a protein-coding gene is called a pre-mRNA and must go through extra processing before it can direct translation.
Eukaryotic pre-mRNAs must have their ends modified, by addition of a 5' cap (at the beginning) and 3' poly-A tail (at the end).
Many eukaryotic pre-mRNAs undergo splicing. In this process, parts of the pre-mRNA (called introns) are chopped out, and the remaining pieces (called exons) are stuck back together.
End modifications increase the stability of the mRNA, while splicing gives the mRNA its correct sequence. (If the introns are not removed, they'll be translated along with the exons, producing a "gibberish" polypeptide.)
To learn more about pre-mRNA modifications in eukaryotes, check out the article on pre-mRNA processing. op this helps !
Transcription is the process of making an RNA copy of a gene sequence. This copy, called a messenger RNA (mRNA) molecule, leaves the cell nucleus and enters the cytoplasm, where it directs the synthesis of the protein, which it encodes.
Transcription occurs in three steps—initiation, elongation, and termination.
What are the three roles of RNA polymerase in transcription?
Eukaryotic cells contain three distinct nuclear RNA polymerases that transcribe distinct classes of genes.
Protein-coding genes are transcribed by RNA polymerase II to yield mRNAs, ribosomal RNAs (rRNAs) and transfer RNAs (tRNAs) are transcribed by RNA polymerases I and III.
Thus, this is the summary of the transcription.
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I really need this answered really soon, because its for my exam, can someone please help meee?!?!?
What is the function of the bilayer of phospholipid macromolecules within a cell?
a.It allows the cell to fold itself into a double layer when placed in a polar environment.
b.It works together with the endoplasmic reticulum to transport materials through the cell.
c.It produces ribosomes which are the site location of protein synthesis.
d.It elongates the cell creating the stretchy physical characteristic of the cell.
Answer:
b. It works together with the endoplasmic reticulum to transport materials through the cell.
I feel that this is the correct answer. If wrong plz correct me!!
Tigers running across the field. what would happen if the hydrogen ion pumps in the Tigers mitochondria stopped functioning?
Answer: A
Explanation:the tiger would not be able to keep running
What would be the most likely outcome if the lysosomes of a human cell stopped functioning?
Protein synthesis would stop.
Protein transfer would stop.
Ribosomal RNA synthesis would stop.
Waste would build up in the cell.
Waste would start to build up in the cell since lysosomes have the role of intracellular digestion of waste materials.
A known disease that is caused by a lysosomal malfunction is Hunter's disease
What is the most important function of sweating
A.To remove excess Heat from the body
B. To remove excess Salts from the body
c. To remove excess urea from the body
d. To remove excess water from the body
