Answer:
a
Explanation:
Neurons secrete chemical molecules that act as messenger and takes part in signalling at the arrival of any chemical or electrical impulse are called a neurotransmitter.
The action potential can be started by:
Option a. Opening K⁺ channels in the postsynaptic membrane.
The action can be explained as:
The presynaptic neurons are the active neurons that transmit the impulse from the synapse with the help of neurotransmitters.The resting neurons or the postsynaptic neurons upon receiving the impulse open the channel gates.The postsynaptic receptors interact with the neurotransmitter that leads to the opening or closing of the ionic channels on the membrane.This leads to depolarization of the membrane causing action potential to occur.Thus potassium channels open.
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Which statement about cellular respiration is true?
O It produces oxy
O It requires water
O It is used by every living cell.
O It converts energy to food.
name of compound of Ca(HCO)2
Answer:
Calcium bicarbonate
Explanation:
A food web is represented below.
Mountain lion
Hawk
SS
Snake
23
Ow
Frog
Rabbit
Mouse y
Deer
Cricket
Shrubs
Grass
Trees
A continuous decrease in the size of the rabbit population would most likely cause a decrease in which other population?
Answer:
The frog population
Explanation:
Because the frogs will no longer have food to eat and might die from starvation. The decrease in the rabbit population affects them directly.
As monoculture becomes more profitable, some crop varieties are threatened
with extinction. Which of the following would be the best solution to this
global economic problem?
O A. Creating an international seed bank to protect biodiversity
B. Establishing international agreements to prevent overfishing
C. Forming strict regulations on greenhouse gas emissions
D. Encouraging developing countries to participate in global trade
Answer:
A. Creating an international seed bank to protect biodiversity
Explanation:
Monoculture involves the growing or rearing of a particular crop or livestock for commercial purposes. This brings more profit due to the importance of such crops or livestock but it results to some crop varieties being threatened with extinction due to the crops not being grown.
The best option would be to create an international seed bank to protect biodiversity and ensure availability of the future planting of the crops.
Why would you expect there to be fewer frogs than worms is this ecosystem?
During the process of _____, mRNA decodes information from the original DNA master plan to build proteins in the ribosomes. translation transcription replication
Answer:
translation
Explanation:
What happens to the soil fertility if some Rhizobium bacteria are added to the soil? Explain your answer
Answer:
if rhizobium bacteria is added to the soil the soils nitrogen levels will increase.
this because that the rhizobium bacteria is able to convert atmospheric nitrogen into a more soluble form .plants arent able to absorb nitrogen directly from the air so the rhizobium helps the plants to obtain nitrogen.
Answer:
The soil will be rich in nitrogen salts and its fertility increases.
Explanation:
the bacteria fixes nitrogen level in the soil by converting nitrogen from the air into nitrogen salts and form nitrates that plants can use easily.
What kind of carbohydrate does rice contain?
Answer:
Rice contain complex carbohydrates or starches.
Which of the following is an organism whose cells do not have a membrane-
bound nucleus?
A. An animal
B. A eukaryote
C. A prokaryote
D. A plant
Answer:
C. A prokaryote
Explanation:
A prokaryote is an organism that consists of a single cell that does not have a nucleus or membrane-bound organelles.
A prokaryote is an organism whose cells do not have a membrane-bound nucleus. Therefore, option (C) is correct.
What is a prokaryote cell?
Prokaryotes are unicellular organisms, such as bacteria and archaea, which lack many of the organelles found in eukaryotic cells, including a nucleus. In prokaryotic cells, the genetic material is contained in a single circular chromosome located in the cytoplasm, which is not separated from the rest of the cell by a nuclear membrane.
The lack of a nucleus is one of the defining characteristics of prokaryotic cells, which are distinct from eukaryotic cells found in animals, plants, fungi, and protists, which all have a nucleus and other membrane-bound organelles.
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How to grow taller? Please explain in great detail
Answer:
try to jump and reach high places like roofs this will help you greatly
Explanation:
he most abundant element in the atmosphere can also be found in
Answer:
Beans and whey protein.
Explanation:
The most abundant element in the atmosphere is nitrogen, and both beans and whey protein contain nitrogen.
Hope this helps! :)
Answer:
All living organisms
Explanation:
The most abundant element in the atmosphere is nitrogen. All the living organisms including plants and animals have nitrogen. It is found in amino acids and is essential for growth.
which are examples of negative feedback? Select three options.
Answer:
C- when someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently
D- when someone’s pancreas hormone increases every time they eat, but decreases when they aren’t eating
E- when a person takes calcium supplements so a gland will stop secreting a hormone that pulls calcium from the bones
Explanation:
I got it right on my test!
ur welcome
The examples of negative feedback among the given options are 1. A child whose thymus gland is building an immune system that gets stronger each day.
3. When someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently.
4. When someone's pancreas hormone increases every time they eat but decreases when they aren't eating.
Negative feedback is a regulatory mechanism in the body that works to maintain homeostasis by counteracting or reversing changes in the body's internal environment.
It helps to keep various physiological processes within a narrow range and prevent excessive fluctuations.
1, the child's thymus gland building an immune system that gets stronger each day is an example of negative feedback. As the child grows, the thymus gland stimulates the production of immune cells (such as T cells) to strengthen the immune system, which is a response to the body's needs.
3, when someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently, it demonstrates negative feedback.
4, when someone's pancreas hormone increases every time they eat but decreases when they aren't eating, it also illustrates negative feedback. After a meal, the pancreas releases insulin to facilitate glucose uptake by cells, reducing blood sugar levels.
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Your question is incomplete, but most probably your full question was.
Which are examples of negative feedback? Select three options.
1. a child whose thymus gland is building an immune system that gets stronger each day.
2. when someone’s adrenal gland reacts to a scary movie by secreting hormones that make the heart beat quickly.
3. when someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently.
4. when someone’s pancreas hormone increases every time they eat, but decreases when they aren’t eating.
5. when a person takes calcium supplements so a gland will stop secreting a hormone that pulls calcium from the bones
What is the basic unit of life? A. An atom B. A cell C. An organism D. An organ
Answer:
B. A cell
Explanation:
The cell is needed for every living organism and is one of the most basic units of life. Cells are like building blocks in an organism.
Hope this helped! :)
Instructions on how to control your cells are contained in what part of the DNA?
A. Pentose Sugar
B. Phosphate group
Hydrogen bonds
D. Nucleotide bases
Answer:
D. Nucleotide bases
Explanation:
Hope it helps.
Nucleotide bases of the DNA contain the instructions on how to control cells.
How does DNA control cells?The hundreds of distinct types of proteins that are produced by cells are coded by the nucleotide sequences that make up DNA. These proteins control and regulate cell development, division, communication with other cells, and the majority of other cellular functions. This is the reason why nucleotide sequences found in DNA are referred to as carrying or storing information.Protein synthesis:
The sequences must first be "decoded," and the protein must then be translated. It is known as protein synthesis.
Transcription (first stage of protein synthesis): The process of copying information from a strand of DNA into a messenger RNA (mRNA) molecule is called transcription. DNA preserves genetic material as a reference or template safely and permanently in the cell nuclei.Translation (second stage of protein synthesis): The process of translation converts the information carried by messenger RNA from DNA into a string of amino acids. Essentially, it involves translating a code (nucleotide sequence) into another code (amino acid sequence).Learn more about protein synthesis here:
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What do does it mean to have a commercial market for space travel and what benefits could come from having one?
Answer:
The commercial market for space travel have generated multiple benefits for scientific experiments.
Explanation:
The flight of NASA astronauts onboard commercial spaceships to the International Space Station may be at risk, but the payoffs from low-cost flights to the orbital station and the increased experimental use of the microgravity environment are expected to be significant. Scientific studies, such as the production of vaccines, are now taking place onboard the space station, so providing more cost-effective means of entering earth orbit could fundamentally change other industries, such as medicinal and materials engineering.
The moon is an example of a _________ object while a lit match is an example of a _______object.
Answer:
Moon- non-luminous
Lit match-luminous
Review the terms and their definitions in the Mini Glossary. Write a sentence that tells how
amplitude and frequency can describe a wave.
Answer:
A wave is a type of motion caused by water and wind that can cause a huge wave also depending on weather and it can be found in a beach at a ocean and more type of water places.
Explanation:
Waves that include both longitudinal and transverse movements include water waves.
Mini Glossary and wave;Particles move in clockwise rings when a wave goes through the waver. As the depth of the water grows, the radius of the circles shrinks.
A wave is a form of motion created by water and wind that can produce a large wave depending on the weather and can be found on a beach, in the ocean, and in other types of aquatic environments.
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5. In your everyday life, you have probably noticed that certain instruments are ideal for certain situations. For example, you would use a spoon rather than a fork to eat soup because a spoon is shaped for scooping, while soup would slip between the tines of a fork. The use of ideal instruments also applies in science. In what situation(s) would the use of a light microscope be ideal, and why
Answer:
A light microscope, particularly when the cell has indeed been spattered to disclose information, would've been ideal when examining a small living organism.
Explanation:
A light microscope is a laboratory biology instrument or device that uses transparent sensors to illuminate and exacerbate and enlarge, very small objects. Individuals use lenses to center light on the test sample, thereby amplifying it to produce an image. The experiment is usually located near the respective.
It does this by producing a magnified image using a series of glass lenses, which first focuses a laser light on or through an object, then conveys objective lenses to expand the created image.
Explanation:
A light microscope would be ideal for viewing significantly small living organisms, such as bacteria , viruses, and other single celled organisms. A microscope is device especially made to magnify the size of object or the beings. So, it helps to the study the details of the tiniest of the things.
For how many hours could an average person be sustained by the body's stored glycogen under resting conditions?
Answer:
The correct answer to the following question will be "12-14 hours".
Explanation:
Glycogen has always been processed throughout the skeleton's liver as well as muscle cells, which lead to the generation of power generation whenever the body can handle it. This seems to be a polyacrylamide, which represents the physical species as a type of power. This could be processed for 12-14 hours in repose throughout the living organism (human body).What can a biologist infer from a population that is uniformly distributed through its habitat?
Answer:
The population has reached its carrying capacity
Explanation:
Answer:b
Explanation:
In which biome would you expect to find warm to hot conditions with a large amount of moisture?
Tropical desert
Chaparral
Temperate forest
Tropical rainforest
Which two phrases best describe cells?
A. Make up tissues
B. Made up of organs
C. The most complex level of organization of life
D. The simplest level of organization of life
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▹ Answer
A. Make up tissues
C. The most complex level of organization of life
▹ Step-by-Step Explanation
A is one of the correct answer choices since cells → tissues → organs → organ systems.
C is the second correct answer choice since cells have such an amazing structure that functions in surprising ways. Cells are our whole body and they function daily in our body, showing that it is very complex.
Hope this helps!
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The structural and functional unit of skeletal muscle is called a/an . The connective tissue covering around a fascicle is the . The part of a muscle fiber that contracts is called a/an . The connective tissue covering an individual muscle fiber is the . The connective tissue covering on the outside of a whole muscle is the .
Answer:
The structural and functional unit of skeletal muscle is called a sacormere
The connective tissue covering around a fascicle is the perimysium
The part of a muscle fiber that contracts is called the myofibril
The connective tissue covering on the outside of a whole muscle is the Epimysium
Explanation:
Biology shows us the fossil record and comparative anatomies. Chemistry shows us that organic molecules can come from inorganic matter. Geology shows us that organisms that used to live together are found on separate continents due to continental drift.
Which fields of science provide evidence for evolution?
biology only
biology and chemistry only
biology and geology only
biology, chemistry, and geology
Answer:
biology, chemistry, and geology
Explanation:
Biology, chemistry, and geology are the fields of science that provide evidence for evolution, hence option D is correct.
What is the evidence of evolution?The uniformity of the fossil sequence from ancient to modern is possibly the strongest fossil evidence for evolution.
Fossils are a reflection of evolution and geological change due to their global distribution of organisms and distinctive traits of island species. The existence of species that are related to modern species but are now extinct is documented through fossils.
It is the series of slow, irreversible changes that occurred in early creatures over millions of years to give rise to new species we know today. Errors in DNA copying and sexual reproduction are mostly to blame for variations that led to the emergence of new species.
Therefore, biology, chemistry, and geology are the fields of science that provide evidence for evolution.
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how does a gene effect the traits of a human
Answer:
They make you look like your parents. You can also do certain things like roll your tongue up or have dimples. It can also determine if you are left handed or right handed or eye color.
Hope this helps
Explanation:
1. . _____ ,_____ and _______ are the three substances present inside a cell.
Answer:
protein lipids and water
Explanation:
they are amongst the substances found in a cell
Como podemos trasladar una caja de 50 kg desde planta baja hata un primer piso que presenta una inclinacion de 40º que tipo de maquina simple se utilizaria
Answer:
Explanation:
We can easily move the box from a ground floor though to the first floor at an angle of 40° to the horizontal by simply pushing the load through an inclined plane. We will simply be lean the inclined plane on the building at the required angle and the push through the the height of the building.
Based on the explanation above, the best type of simple machine to use is an INCLINED PLANE. Note that the essence of using a machine is simply to make our work easier and faster and also be able to overcome a much larger load with a minimal effort.
which structure is found mainly in green plants and bacteria
Answer:
Cell Walls
Explanation:
Animals cells do not have cell walls, only cell membranes. However, lots of plants and bacteria have cell walls to further protect past the cell membrane and provide rigid structure.
Which of the following activities contributes most to climate change?
A. Running a mile
B. Heating your home
C. Reading a book
D. Turning on a light
Answer:
heating your house
Explanation:
it makes up the house's carbon footprint
plsss help me
Which of the following choices is not a result of Meiosis?
production of more cells
mix up of the combinations of alleles
recombination
combination
Combination is not a result of Meiosis because in meiosis cell division recombination of alleles occur.
What is meiosis?Meiosis is a type of cell division in which a single parent divides into four daughter cells having half number of chromosomes.. This type of cell division occurs in sex cells of an organism. In meiosis, a diploid cell is divided into haploid cells.
So we can conclude that Combination is not a result of Meiosis because in meiosis cell division recombination of alleles occur.
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The combination is not a term referred to the cell division process called Meiosis.
What is meiosis?Meiosis is a type of cell division that generates four daughter cells having half genetic material.
Meiosis generate four different germinal recombined cells, whereas mitosis generates somatic cells.
In conclusion, the combination is not a term referred to the cell division process called Meiosis.
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