Answer:
are embedded in the cell membrane
Explanation:
Voltage-gated ion channels are transmembrane proteins activated by changes of the electrical potential across the plasma membrane. Structurally, voltage-gated Potassium (K) channels are composed of six transmembrane helices where amino- and carboxyl-terminal peptides are localized intracellularly (in the cytoplasm). The Helices 1 to 4 (H1-H4) comprise the voltage sensor domain that forms an anti-parallel helical bundle. H4 has many positively charged amino acids (Arg and Lys residues) which are key to the voltage-sensing function. Finally, Helices 5 and 6 (H5-H6) form the channel pore which is localized in the center of the protein.
The cycling of matter through all of the organisms, populations, and ecosystems of earth
is ultimately powered by what form of energy?
A. Nuclear
B. Light
C. Chemical
D. Kinetic
Answer:
B. Light
Explanation:
The cycling of matter through all of the organisms, populations and ecosystems of the earth is ultimately powered by the light energy from the sun.
All organisms uses the light energy from the sun to derive other forms of energy for their own use.
Light energy is taken into the ecosystem by plants by the process of photosynthesis. During this process, light energy is converted to chemical energy which is stored in organic molecules. This chemical energy is therefore transformed into other forms of energy available in the ecosystem.An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes * 1 point solutes to move out of the cell. solutes to move into the cell. water to move out of the cell. water to move into the cell.
Answer:
water to move into the cell.
Explanation:
Osmosis is the process by which water moves from a region of low solute concentration (high water conc.) to a region of high solute concentration (low water conc.) across a semipermeable membrane. The movement of water is initiated by the formation of an osmotic gradient i.e. difference in concentration between the two sides of the membrane.
In this case, an animal cell is said to be surrounded by fresh water. This means that the solution in the animal cell is HYPERTONIC (high in solute concentration) to the solution in the extracellular environment, which is HYPOTONIC. This osmotic pressure causes water to move into the animal cell i.e. from the region of high water conc. (freshwater) into region of low water conc. (animal cell), causing the cell to burst.
True or false, a battery like a duracell or energizer battery stores the energy we get from it as nuclear energy? True False
Answer:
true
Explanation:
My guess would be false, sorry if I'm wrong.
This word means “to take in”
A) synthesize
B) release
C) absorb
D) produce
The amount of energy the producers in an energy pyramid provide the primary consumers is
4,000 joules. From this amount, 40 joules are provided to the tertiary consumers. Based on
this model, how much of the energy was provided to secondary consumers?
A. 40,000 J
B. 400 J
C. 4 J
D. 40 J
what is the effect of soil salinization on crops?
Answer:
Salinity affects production in crops, pastures and trees by interfering with nitrogen uptake, reducing growth and stopping plant reproduction. Some ions (particularly chloride) are toxic to plants and as the concentration of these ions increases, the plant is poisoned and dies.
Explanation:
Brainliest please?
Jingle bells, jingle bells
Jingle all the way
Oh, what fun it is to ride
In a one horse open sleigh
Answer:
dashing through the snow:)
Explanation:
I NEED HELP!!!!!!!!!!!!!!!
THE 1ST 1 IDK IF ITS RIGHT I JUST ACIDENTLY CLICKED IT SO I THINK ITS NOT RIGHT AND THE 2ND 1 DO NOT USE G O O G L E PLS USE UR OWN WORDS PLS AND THANK YOU ILL MARK BRAINLIEST!!!!
Answer:
Question 26.
B. deposition
Question 21.
Erosion is a destructive force because they disassemble landforms and ultimately destroy the features. Kind of like cultural traits/aspects being diminished. Whereas, deposition is a constructive force because the depositing of sediments can literally form entire landforms- like sand dunes. It takes bits by bits or sediment by sediment to build an entire structure.
One of the main differences between plants and animals is
Answer:
Plants use sunlight for food and animals don't.
Explanation:
Hi
3. Why is it easy to describe an organism's phenotype for a particular characteristic but
very difficult to state the genotype?
Answer:
The sum of an organism's observable characteristics is their phenotype. A key difference between phenotype and genotype is that, whilst genotype is inherited from an organism's parents, the phenotype is not. Whilst a phenotype is influenced the genotype, genotype does not equal phenotype
(04.03 HC)A scientist records the populations of two species over a period of time.
Both populations lived in the same ecosystem and experienced normal growth
patterns that eventually resulted in both reaching carrying capacity. However,
conditions in the ecosystem changed. In the new conditions, Population 1 was
unaffected while Population 2 decreased. Based on this, the scientist claims both
populations competed for the same food source and Population 1 was more
aggressive than Population 2 in searching for that food. Based on the data stated;
describe other possible interpretations of the data and why this scientist's claim is
invalid. (5 points)
Answer:
The likely explanation is that population 1 had traits which were more favorable to its survival than population 2's in the new conditions. It wouldn't have to do with food competition, but the traits they already have that may or may not be conducive to their survival in the new conditions.
Explanation:
Let me explain. Say a drought occurred on an island. Population 2 relied on eating bugs that lived in the green grasses. Population 1 relied on eating cactus fruit, which is drought-resistant. Say that because of the drought, population 2 started to decrease since there were less bugs to eat because the grasses dried up. Population 1 is unaffected because the bugs they eat were still in abundance.
This all has to do with the concept of natural selection. Species with traits that are good for their environment will likely do well unless a change in conditions occurs which makes their traits no longer favorable.
Hope that makes sense!
Genetics is defined as: Group of answer choices The scientific study of cells The study of cloning The scientific study of heredity The dividing of cells
Answer:
The correct answer is ''The scientific study of heredity''
Explanation:
Genetics is a branch of biology that studies how hereditary characters are transmitted from generation to generation and the diversity that exists among living beings. Inheritance is the physical and biological characteristics that we share with our family and that can determine our appearance and our biological characteristics, that is, our phenotype (eye color, skin type, etc.) as well as our internal characteristics. All of this is largely derived from our genetic components, that is, our genotype.
Why are you so much more likely to see a rabbit than a lion when you’re out on a hike?
Answer:
Because quantity of rabbits is much greater than lions.
Population of lion is less while population of rabbits is more
Explanation:
In erythroblastosis fetalis, only pregnant women who are ____ must be treated with injections to prevent their antibodies from attacking their baby s red blood cells
Answer:
Rh-negative
Explanation:
Erythroblastosis fetalis is a clinical condition whereby maternal antibodies begin to attack the fetal red blood cells due to incompatibility in the Rh of mother and fetus. Rh, which stands for Rhesus factor, can either be positive (Rh+) or negative (Rh-).
However, this condition (erythroblastosis fetalis) occurs in mothers/women who are Rh-negative. When an Rh- mother carries a fetus that is Rh+, the antibodies in the white blood cells of the mother identifies the blood cells of the fetus as FOREIGN, hence, begin to attack it.
However, one preventive measure is that pregnant women who are Rh-NEGATIVE must be treated with injections called Rh immunoglobulin to prevent their antibodies from attacking their baby's red blood cells.
Positive feedback mechanisms are useful for which of the following situations?
A. Modulating a stimulus to stay within a defined range ·
B. Modulating a stimulus to move toward an endpoint
C. Amplifying a stimulus to move toward an endpoint
D. Amplifying a stimulus to stay within a defined range
Answer:
C. Amplifying a stimulus to move toward an endpoint
Explanation:
The mechanism of inputs and outputs are operated by biological systems. It is either it is caused by an event or it is causing a certain event. Feedback is very important in this system. Feedback loops are the paths in which a change to the system brings about an alarm that actually brings a certain result. In a positive feedback loop, the product of a reaction brings an increase in the reaction. This is carried out by amplifying effects of a product (stimulus) to move toward an endpoint.
Option C is the correct answer.
How do scientists compensate for these uncertainties so their models more closely represent the real world
Answer:
Instead, real-world agents, including scientists, decide ... Because these scientific models often deviate from ... A is represented, unless there is a good reason to do so.
PLLSSS HELPP
Nitrogen bases are always connected to which part of the nucleotide?
Answer:
The nitrogenous bases form hydrogen bonds between opposing DNA strands to form the rungs of the "twisted ladder" or double helix of DNA or a biological catalyst that is found in the nucleotides. Adenine is always paired with thymine, and guanine is always paired with cytosine. These are known as base pairs.
Explanation:
The key aspect of receptor-gating in the associative induction of hippocampal LTP is that Group of answer choices the NMDA receptor acts as a molecular coincidence detector. both the NMDA and AMPA channels must be open in order for the cell to depolarize. The NMDA receptor allows the flow of magnesium into the cell. all glutamate receptors open automatically whenever glutamate is in the synaptic cleft. the AMPA receptor allows calcium into the cell only after the NMDA receptor is activated.
Answer:
The correct answer is NMDA receptor acts as a molecular coincidence detector.
Explanation:
The hippocampus works entirely for memory processes (especially new learning). Lasting depression (LTD) is also considered as another form of expression of synaptic plasticity. Long-term potential occurs when pyramidal neurons are depolarized and stimulated by excitatory input. The neurophysiological basis for LTP is certainly related to a subtype of NMDA of the glutamate receptor. This receptor behaves as a coincidence detector between pre- and post-synaptic activity, with an increase in glutamate release at the presynaptic level coinciding with a Postsynaptic depolarization that allows the entry of ca2 +. The NMDA receptor has been proposed as the basic mechanism of learning, because it has the ability to associate different signals, for all this it is necessary to know what neurotransmitters are, their function and what is the role of the receivers in them.
PLEASE HELP ILL MARK U BRAINLYIST OR WHATEVER
Answer:
the correct answer is: "c. 23, 46"
A habitat is:
A Interactions between species
B Resources in an ecosystem
C Where a species lives
D Nonliving things
Answer:
where species lives like water are the natural habitat of fish
A __ is a moderately wet and mild biome with four distinct seasons. Many trees are present with most annually losing their leaves in autumn. Animals are generally permanent residents.
Answer:
Temperate Deciduous Forest
Explanation:
The lab setup shows four test tubes. Tube 1 contains water only. Tube 2 contains a live snail. Tube 3 contains a live green water plant. Tube 4 contains both a live green water plant and a live snail.
In this setup, which tubes contain at least one organism carrying on cellular respiration?
A) Tubes 1 and 2 only.
B) Tubes 2 and 4 only.
C) Tubes 3 and 4 only.
D) Tubes 2, 3, and 4 only.
Answer: D
Explanation:
Describe the modern synthetic theory of evolution
Answer:
i think this is the answer
The modern synthetic theory of evolution explains evolution in terms of genetic variation in a population that leads to the formation of a new species and explains the contribution of factors such as genetic variation, reproduction and geographic isolation, and natural selection.
What is Modern Synthetic Theory of Evolution?The "modern synthesis" describes the early- to mid-century formulation of evolutionary theory, which reconciled classical Darwinian selection theory with a new population-oriented approach to Mendelian genetics, which attempted to explain the origins of biological diversity.
The factors which is involved in Modern synthetic theory can be broadly divided into three main concepts:
1. Genetic variation
2. Natural selection
3. Isolation
The modern synthesis of the theory which differs from Darwinian evolution in that it expands on the theory to include genes as the medium by which traits are passed down.
Thus, the modern synthetic theory of evolution explains evolution in terms of genetic variation in a population that leads to the formation of a new species and explains the contribution of factors such as genetic variation, reproduction and geographic isolation, and natural selection.
Learn more about Evolution, here:
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which result is most likely if the digestive system fails to work properly?
A. The excretory system will produce excess waste products
B. The body supply of oxygen will be too low to sustain life
C. The reproduction system will be unable to produce gametes
D. The body's cells will be unable to receive the nutrients necessary for energy products
Answer:
I’m on the same question
Explanation:
Answer:
d
Explanation:
The most common problems associated with the digestive tract are diarrhea, constipation, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and heartburn. These can be caused by many things, such as an unhealthy lifestyle, poor nutrition, a food sensitivity or even an infection.
Because of this we can assume that the answer is d
Older fossils appear in rock layers–below below new new fossilsfossilsabove above new new fossilsfossilsin the the same same layer layer as as new new fossilsfossilsthat that also also have have new new fossilsfossils
Answer: below new fossils
Explanation:
Rocks are usually arranged in Layers of which the oldest are found in the bottom and the recent rock layers found on the top. This is in line with the Law of superposition which states that every rock layer is older than the one which lies above it, This law together with the Law of faunal / fossil succession helps us to understand the assemblage of fossils and how they succeed each other with time. From this, we can say that older fossils in a rock will lie farther below a rock layer leading to the oldest fossils occurring at the deepest part of the rock layers and the newest fossils appearing at the top of rock Layers.
We can therefore say that Older fossils appear in rock layers–below new fossils.
Answer:below new fossils
Explanation:
which unit contains the most different types of organisms
a. species
b.community
c.ecosystem
d.population
When damage occurs to the antidiuretic hormone (ADH)-producing cells in the hypothalamus from head trauma, intracranial tumors, or neurosurgery, what disorder is suggested by a large diuresis of very dilute urine
Answer:
diabeytes insupidus
Explanation:
Another name for antidiuretic hormone (ADH) is arginine vasopressin.
It is made by the hypothalamus in the brain.
It is stored in the posterior pituitary gland.
This hormone helps in regulation of the amount of water in blood.
When damage occurs to the antidiuretic hormone (ADH)-producing cells in the hypothalamus from head trauma, intracranial tumors, or neurosurgery, what disorder is suggested by a large diuresis of very dilute urine diabeytes insupidus.
What would be the chemical formula of a trisaccharide made of three bonded glucose molecules?
Which statement best describes this role of plastids in the plant cell?
A) Chloroplasts transform chemical energy into electromagnetic energy.
B) Mitochondria transform light energy into chemical energy.
C) Chloroplasts transform light energy into chemical energy.
D) Mitochondria transform chemical energy into electromagnetic energy.
Answer:
A) Chloroplasts transform light energy into chemical energy.
Explanation:
Chloroplasts are plastids, cellular organelles inherent in plant cells, which contain a green pigment, chlorophyll, by which they perform photosynthesis.
Photosynthesis is a process in which, with the help of chlorophyll, solar energy is converted into chemical energy in order to use that chemical energy (ATP) for the synthesis of organic matter from inorganic matter (CO2 and H2O).
Answer:
C. Chloroplasts transform light energy into chemical energy.
Explanation:
The purpose of the Calvin cycle is to fix _______ . The Calvin cycle takes place in the ______________. There are 3 steps to the Calvin cycle. In step 1, __________ is fixed by an enzyme called Rubisco. Rubisco adds CO2 to RuBP to form 2 molecules of ____________.
Answer:
1. carbon in CO2
2. Stroma of the chloroplast
3. Carbon dioxide
4. 3- phophoglycerate (PGA)
Explanation: