Explanation:
Small and nonpolar (hydrophobic) molecules can freely pass through the membrane, but charged ions and large molecules such as proteins and sugars are barred passage.
Nonpolar and small polar molecules can pass through the cell membrane, so they diffuse across it in response to concentration gradients.
Which of the following statements is true about chromosomes in multicellular organisms?
Choose 1 answer:
A) a chromosome contains numerous DNA molecules.
B) Chromosomes are located in both the nucleus and cytoplasm of the cell.
C) Each chromosome contains a large number of genes.
Answer:
Im not sure but c?
Answer:
The answer is c :)
Chlorophyll appears green because it…?
Answer:
Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light. That particular light wavelength is reflected from the plant, so it appears green. Plants that use photosynthesis to make their own food are called autotrophs.
Answer:
A. absorbs green light
B. reflects green light
C. emits green light
ANSWER: B. reflects green light
Explanation:
our eyes can only see what objects reflect, so if it's appearing green then obviously it's reflecting the green light.
How was Earths climate changed over time?
Answer:
Explanation:
These changes have been triggered by the changing configuration of continents and oceans, changes in the Sun's intensity, variations in the orbit of Earth, and volcanic eruptions.
PLEASEEE HELPPPP!!!! PLSSSS!!!!
All of the following can increase blood pressure except for
D. parasympathetic nervous stimulaton
B. sympathetic nervous stimulaton
A. reduction in arteriole diameter
C. angiotensin II
Answer:
D!
Explanation:
Mastication is performed by which of the following accessory digestive organs?
Answer:
d. All of the above
Explanation: is correct
Nearly all forests in ________ have been cut at least once during the past 300 years, so very little original (virgin) forest remains.
Answer:
In the United States.
Explanation:
It doesn't have very many original forests because people have been chopping them down and planting new ones.
Which part of a fish detects vibrations
and temperature changes?
Answer:
For each fish's skin surface, a row of unique cells is contained inside a particular canal that runs the length of its body. This is referred to as the "lateral line," because it enables them to sense vibrations in the water. Fish are able to notice activity around them as well as changes in the flow of water thanks to their sixth sense.
Explanation:
Hope it helps:)
To all bug experts, what is this bug?
Answer:
I think it is an emerald cockroach
Ozone in the stratosphere is a toxic pollutant that can cause tightness or shortness of breath.
True
False
Ozone in the stratosphere is a toxic pollutant that can cause tightness or shortness of breath is a true statement.
What is ozone layer?One layer of the stratosphere, the second layer of the Earth's atmosphere, is the ozone layer. The layer of insulating gases that clings to our planet is known as the stratosphere.
A small layer of the Earth's atmosphere called the ozone layer absorbs nearly all of the sun's harmful UV energy. Areas of the ozone layer degradation are frequently referred to as "ozone holes." That is incorrect. Damage to the ozone layer is more akin to a very thin patch than a hole.
Therefore, Ozone in the stratosphere is a toxic pollutant that can cause tightness or shortness of breath is a true statement.
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Explain in your own words what is meant by one of the diagrams below, you only need to choose 1 to talk about. Share as much detail as you can.
The T-Rex diagram relates to the evolution of species on planet Earth.
The following images are shown in this diagram:
A T-Rex dinosaurA drawing of the planet EarthA drawing of grassA drawing of a cowA drawing of a humanThese 5 pictures can be related to finding the main message of the diagram. This diagram can be interpreted as the evolution of species on planet Earth because a dinosaur is shown first, a species that lived millions of years ago.
An image of the Earth is then displayed showing the familiar shape of the continents to demonstrate evolution on the Earth's surface.
Then show the grass because this represents the evolution of plant species that were expanding throughout most of the Earth.
Subsequently, a cow is shown as an example of the mammalian animals that exist today and finally the human who is the product of various evolutionary processes that resulted in the society and the world that we know today.
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Axons from higher brain centers form motor tracts that descend from the brain into the white matter of the spinal cord and then synapse with somatic motor neurons in the ____________.
Motor output that is gotten from the spinal cord to skeletal muscles involves somatic motor neurons of the anterior gray horn. Many somatic motor neurons are regulated by the brain. Axons from higher brain centers form motor tracts that descend from the brain into white matter of spinal cord and then synapse with somatic motor neurons either directly or indirectly by first synapsing with interneurons that in turn synapse with somatic motor neurons.
Sensory receptors is known to detect sensory stimulus.
Sensory neurons often convey sensory input by nerve impulses through their axons. Their axon often start from sensory receptors into the spinal nerve and into posterior root.
From posterior root, axons of sensory neurons have 3 different choices of paths.
Axons of sensory neurons does start into the white matter of the spinal cord and moves up to brain as part of sensory tract.Axons of sensory neurons sometimes do moves into the posterior gray horn and synapse with interneurons that has its axons extend into the white mater of spinal cord and thereafter moves to brain as sensory tract.Axons of sensory neurons oftens moves into the posterior gray horn and synapse with interneurons which the synapse with somatic motor neurons.Axons that is gotten from spinal cord often synapse with other motor neurons in PNS.
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What part of the plant produces fruit and seeds? HELP ASAP!!!!!!!!!!!!!!!!!!∵
Answer:
a
Explanation:
Answer:D- Pistil
Explanation:
What part of the plant produces fruit and seeds?
A)Stem
B)Leaves
C)Stamen
D)Pistil
The __________ is the complex organ that enables people to complete many actions and processes. A. heart B. brain C. spinal cord D. nervous system
Answer:
B brain just took the quiz 2021
Explanation:
how do oxygen and carbon dioxide cross from the alveoli through the capillary walls and into the blood?
Answer:
The concentration gradient of oxygen in your lungs wants to flow toward homeostasis and oxygen is bound on red blood cells by hemoglobin, along with the attraction of oxygen to hemoglobin. The concentration gradient from carbon dioxide from the capillary to the lungs. There is more oxygen in your lungs (alveoli) than there is carbon dioxide and everything want to reach homeostasis, or level amounts on both sides.
Explanation:
pleaseeeeeeee help meeeeeee!!!
When testing the effect of penicillin on the growth of E. coli, penicillin would be considered the? A.independent variable B. dependent variable C. constant
1. Single-celled organisms
are also called
a. multicellular
b. bacteria
c. unicellular
d. viruses
Answer:
C
Explanation:
A unicellular organism, also known as a single-celled organism
A place where animals and plants are protected is called
A) an ecosystem
B) a refuge
C) a sanctuary
D) both B and C
Hello! can someone help me w this pls
The state of the atmosphere at any given time and place is referred to as ______________
Answer:
Weather
Explanation:
Search The state of the atmosphere at any given time and place is referred to as
Answer:
Weather
Explanation:
Weather is defined as the state of the atmosphere at a given time and place. Hope this helps you!
Which diagram below shows the process of meiosis - Diagram A or Diagram B? How do you know? Explain all the details that prove you are correct.
From the diagram, meiosis is shown by the diagram in B in the question.
What is meiosis?Meiosis occurs when a cell divides in such a way that each daughter cell gets only half of the number of chromosomes in the parent cell.
Looking at the cell division in diagram B, we can see that there are only two chromosomes in each daughter nuclei out of the four chromosomes in the parent nuclei hence that us meiosis.
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during replication, which enzyme unwinds the dna double helix?
DNA helicase enzyme unwinds and breaks H bonds between the 2 complementary strands using ATP to separate the 2 strands.
give 3 exampels of where potential energy was converted to klinetic energy
Answer:
1. A rock falling off a cliff
2. Roller coaster starts plummeting from the top
3. Pendulum swings from the top to the middle, once it starts the second up swing the kinetic turns back into potential energy
Answer:
1. Pushing a large rock down a hill.
2. Kicking a stationary soccer ball.
3. Releasing a taut rubber band
I don't know how varied your class's examples of potential energy have been so far, but there are many kinds if you need more variety.
Explanation:
You can just use your imagination for these if you want to! Potential energy is the energy that an object can have, its potential to have energy (just like it says), while kinetic energy is the energy of a moving object. All you need to do is take a still object and apply force to it.
The bright color pigment of some frogs serves as a warning to predators. This chemical defense is known as ___.
Answer:
A pose mat is m
Explanation:
I searched it , but basically a pose mat i s m is when an animal is brightly coloring to warn predators that it is not worth eating.
Put the first word together, brainly wont let me post
The bright color pigment of some frogs is processed as a warning to vampires. This chemical defense is understood as poisonous.
What is Chemical defense?
These bright colors serve as a warning to predators: "Don't consume me; because it is poisonous." In this consideration, frogs aren't overhead bluffing.
Some nonpoisonous species of frogs have assumed the colors of poison dart frogs to trick vampires into offering them an expansive berth they don't earn.
This technique is prompted by melanin, a dark pigment. These frogs usually combine in with their surroundings and their skin functions as camouflage.
Different anurans are brightly embroidered. When If the bright colors alternate with opaque splotches the coloring may serve as a warning to predators that the frog or toad is poisonous.
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What are two types of evidence that support the hypothesis that earth and the rest of the solar system was formed by a condensing nebula
Comets, Asteroids and metoeorites support the hypothesis that earth and the rest of the solar system was formed by a condensing nebula.
What are the functions of asteroids?An asteroid is a minor planet of the inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic or icy bodies with no atmosphere.
They probably consist of clay and silicate rocks, and are dark in appearance. They are among the most ancient objects in the solar system. The S-types ("stony") are made up of silicate materials and nickel-iron. The M-types are metallic (nickel-iron).
Almost all of the asteroids in our solar system are orbiting in a broad band 19,400,000 miles wide between Jupiter and Mars. The asteroids are orbiting the Sun, each one traveling around the Sun fast enough for the orbits not to degrade.
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What are the three types of posttranscriptional processing? select the three types.
Answer:
5' capping, addition of the poly- A tail, and splicing.
Explanation:
I got it right on the test!! I hope this helps.
Can someone help me with this please? i would really appreciate it
Answer:
I'll try, what is it?
Explanation:
help 4-6 pls!!??!!!!!!!!!!!!!!!
Answer:
Hopefully this is correct!! Not sure...
Explanation:
4) D
5) A
6) C
Ciliated ependymal cells: A) help form the blood-brain barrier. B) circulate cerebrospinal fluid. C) form myelin in the brain and spinal cord. D) serve as wandering phagocytes during brain injury.
Ciliated ependymal cells: circulate cerebrospinal fluid.
Ependymal cells are a type of epithelial cell that is associated with the cavities of the body through which the cerebrospinal fluid circulates.
They are part of glial cells, which share space with neurons in the nervous system.They create the membranes that keep cerebrospinal fluid circulating through the ependymal canal of the spinal cord and the cerebral ventricles.For this, the ciliated structure that these cells present is essential for a correct movement of the cerebrospinal fluid, preventing it from spilling through other tissues and passing to areas of the body where it should not be.The cilia move rhythmically creating tiny currents for fluid to flow through the central nervous system.A small fraction of highly specialized and modified ependymal cells, called choroidal cells, are responsible for generating this essential fluid.Therefore, we can conclude that ciliated ependymal cells circulate cerebrospinal fluid.
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Osteoclasts are responsible for which of the following processes?
Osteogenesis
*Resorption
Ossification
Oseogenesis
Answer:
b. Resorption
Explanation: is correct
True or false: Theoretically, it is possible (but very difficult) for a population to not evolve for a while.
It is true that it is possible for a population to not evolve for a while.
There is something called the Hardy-Weinberg theorem, which characterizes the distributions of genotype frequencies in populations that are not evolving.
There are 5 Hardy-Weinberg assumptions:
no mutation random mating no gene flow infinite population size and no selection (natural nor forced).You can see that some of these are kinda extreme and really hard to get, but with approximations, we can work.
For example, instead of an "infinite population size" we have enough with a really large population, such that genetic drift is negligible.
Concluding, yes, it is possible (but really difficult) for a population to not evolve for a while (at least, in nature), as long as the 5 assumptions above are met.
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