Answer:
cell membrane: provides protection for a cell . It also provides a fix environment inside the cell and the membrane has several different fonctions . One is to transport nutrients into the cell and also transports toxic substance out of the cell.
cell wall: cell wall is a structual layer sorrounding some types of cells , just outside the cell membrane . it can be tough , flexible ,and sometimes riding. it provides the cell with both structual support and protection , and also acts as a filtering machine.
How are electrons distributed around the nucleus?
Answer:
they move in orbitals or subshells
Explanation:
Answer:
In layers of orbits around the nucleus. The first orbit is two electrons and the rest are 8 electrons each except the last orbit which are the valence electrons.
Explanation:
Can buoyancy act between bodies in contact or not in contact??
Answer:
Buoyancy is a force. It is an contact force. But why? Because it is a force that acts between two objects, opposite a body force.Eutrophication both hurts and helps
aquatic environments.
true
false
Answer:
False. Eutrophication is an enrichment of water by nutrient salts that causes structural changes to the ecosystem such as: increased production of algae and aquatic plants, depletion of fish species, general deterioration of water quality and other effects that reduce and preclude use”.
Organisms that eat other organisms for the energy needed to live are
called?
Answer:
I'm pretty sure it is a heterotroph
Answer:
heterotroph
Explanation:
is an oorganism that eats other plants and animals for energy
HELP NOW PLS
Air masses are moved around by _____________.
Answer:
Air mass motion is usually from the air flow in the upper atmosphere. As a stream changes intensity, and position, it affects motion, and strength of air masses.
Explanation:
Why might scientists use computer models in research instead of conducting an experiment on the real system they would like to study?
Answer:
Using the real system might mess up and using a computer model is clearer and gives a more advanced view
I NEED HELP ASAP!!
1. is Pepsi a mixture or pure substance?
2. is Sulfur mixture or pure substance?
3. is Copper penny pure or substance?
Answer:
Pepsi- Mixture
Sulfure- Pure substance
Copper penny- Mixture
Explanation:
Which factor contributed most to the development of the cell theory?
The factor that contributed most to the development of the cell theory is the advancement in technology.
With advancements in the area of technology, significant improvements were made to the primitive microscope initially invented by the likes of Hans and Zacharias Janssen, and more powerful microscopes like the electron microscopes were invented. With these, details of the cell could be observed and all the organelles could be studied, including how the cell divides (give rise to another cell).
Still on the technological advancement, the discovery of differential staining materials made it possible to differentiate several biological phenomena as they relate to the cell.
Thus, by extensively studying the cell using microscopes and differential staining dyes, the cell theory was developed by the likes of Theodore Schwann, Mathias Schleiden and Rudolf Virchow.
More on the cell theory can be found here: https://brainly.com/question/5597701
true or false:
One difference between somatic cells and gametes is that somatic cells are identical to one another, while gametes are not
Answer:
true.
Explanation:
all the somatic cells of an organism have same number of chromosomes while gametes are haploid and have half number of chromosomes. so gametes are different from somatic cells.
help a girl out please thanks:))
Answer: to me its either a or c!
but i mostly feel like its c!
Explanation:
hope i helped, sorry if i got this answer wrong!
how can HIV affect individuals day to day life
- be precise
Answer:
that seems hard
Explanation:
Defend it: viruses are not alive. Select the five correct statements. A. They don't make their own membranes. B. They have their own proteins. C. They have no metabolism outside the host cell. D. They don't move. E. They don't respond to their environment. F. They don't have cytoplasm or ribosomes. G. They have only one nucleic acid.
Answer:
viruses are not alive because:
they do not make their own membranes.
they don't have cytoplasm or ribosomes.
they have only one nucliec acid.
they have no metabolism outside the cell.
they don't move.
Explanation:
all these statements are true.
Most animal lineages evolved during the period.
Answer:
Cambrian period
The Cambrian period, occurring between approximately 542–488 million years ago, marks the most rapid evolution of new animal phyla and animal diversity in Earth's history.
Explanation:
Answer:
h fcectjbtvrfehycrctzegrjtj
The process of water moving from the Earth to the atmosphere and back again is called the
A. Earth cycle
B. Atmosphere cycle
C. life cycle
D. water cycle
REWORD THIS IN YOUR OWN WORDS!
They are eukaryotic, which means they have a nucleus. Most have mitochondria. They can be parasites. They all prefer aquatic or moist environments.
Answer:
Eukaryotic organisms have no nucleus and prefer aquatic or moist environments. Interestingly, some are parasites, and some do not have mitochondria.
Explanation:
You may need to add some more sentences to better link these two together.
Someone please it’s due in 20 mins and I’m worried I won’t have it done can someone please help!!! ASAP!!!!
Answer:
the last one is volcanism
Answer:
Umm well how much do you know about already?
Explanation:
RNA has a different nitrogenous base. This" different" base pairs with Adenine meaning RNA base pairs are represented (A-U & C-G). What is the name of the nitrogenous base only found in RNA
A. Thymine
B. Uracil
C. Cytosine
1. How does the cell membrane allow animals to move without rupturing the cells in the body?
2. How does a cell membrane allow some molecules to pass right through the membrane?
3. Why is it important the some molecules (oxygen and carbon dioxide) be allowed to pass through the cell membrane without the use of a transport system?
4. How does the cell membrane allow the cell to reproduce into two separate cells?
5. In the lab, small bubbles would merge with the larger bubbles. How does this property of cell membranes demonstrate how a vesicle can transport substances from one organelle to another?
6. Cells require molecules that cannot simply pass through the cell membrane. Explain how the cell can use proteins to transport these molecules across the cell membrane.
.
Explanation:
1)The cell membrane functions as a semi-permeable barrier, allowing a very few molecules across it while fencing the majority of organically produced chemicals inside the cell. Electron microscopic examinations of cell membranes have led to the development of the lipid bilayer model (also referred to as the fluid-mosaic model). The most common molecule in the model is the phospholipid, which has a polar (hydrophilic) head and two nonpolar (hydrophobic) tails.
2) simple diffusion across the cell plasma membrane. The structure of the lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down the concentration gradient is , by simple diffusion.
3) some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic or however, because they are charged the polar, they can't cross the phospholipid part of the membrane without help .
4) during fission a copy of the DNA is made and attached to the cell membrane as well. As this cell elongate in preparation for fission, the two DNA copies are pulled apart two opposite ends of the cell. New membrane material is deposited between the two ends of the cell, and a new wall grows between them .
5) UMASS STEM-ED From Bubbles to Cell Membranes Workshop. Bubble ... dynamic nature which can't be properly appreciated in a static textbook. ... the small thread through one of the straws.
6) example of passive transport and active transport across a cell membrane so, cell membranes are semipermeable meaning they have control over what molecules can or cannot pass through. Some molecules can just drift Inn.
A hawk eats a mouse. This kills the mouse, but it also means that the remaining mice will not have to compete as much for food with each other. Based on this information, what is the relationship between the hawk and the mouse?
A. The two organisms are in a mutualistic relationship.
B. The two organisms are in a predator-prey relationship.
C. The two organisms are in a parasitic relationship.
D. The two organisms are in a competitive relationship.
Answer:
The two organisms are in a predator-prey relationship.
Explanation
because the hawk is the predator, it ate the mouse, and th mouse was they prey, it was eaten
Answer:
B
Explanation:
4. Which of the following is NOT a disadvantage of asexual reproduction?
1do not need a mate
2little genetic variation
3mutations can occur
4all susceptible to same diseases
Answer:
4
Explanation:
The advantage of asexual reproduction is that it does not need a mate. Only one parent is needed for asexual reproduction.
What is asexual reproduction?Asexual reproduction is a type of reproduction where only one parent is need and it does not involve fusion of gametes.
It does not involve exchange of chromosomes.
The offspring that arise by asexual reproduction are genetically and physically identical to each other.
Advantages of asexual reproduction includes :
no need of matemore efficient faster than sexual reproductiongenetically identical offspring generated etc.To know more about asexual reproduction :
https://brainly.com/question/423209
#SPJ2
what is a warm air mass that rises over a cold air mass?
Answer: warm front
Explanation: When a warm air mass meets a cold air mass, the warm air rises since it is lighter. At high altitude it cools, and the water vapor it contains condenses. This type of front is called a warm front. It generates nimbostratus clouds, which can result in moderate rain.
Explain how stem cell therapy helped Lucy break down deoxyadenosine
Answer:
It helped her fight off the stop protein, eventually helping her create more amino acids.
The stem cell therapy helped lucy break down deoxyadenosine as it helped her fight off the stop protein, eventually helping her create more amino acids.
What is amino acid?Amino acid has the organic compound containing both an amino[tex](-NH2)[/tex] and a carboxylic acid [tex](-COOH)[/tex] functional group. The component of amino acid not contained in starch is that amino acids contain nitrogen but not starch.
On the other hand, starch has a carbohydrate molecule made up of monomers called monosaccharides. The monosaccharide is a long chain of carbon, hydrogen and oxygen atoms. This suggests that the major structural difference between amino acids and starch has that amino acids contain nitrogen but not starch.
There are several types of protein such as structural protein, transport proteins, antibodies, contractile proteins, hormonal proteins, and enzymes.
Therefore, The stem cell therapy helped lucy break down deoxyadenosine as it helped her fight off the stop protein, eventually helping her create more amino acids.
Laern more about amino acid on:
https://brainly.com/question/18270694
#SPJ6
At which intersection is turning left at a red light permitted?
Answer:
I think (c) is the correct answer
Explanation:
Please give thanks to all my answers and please mark as brilliant and please follow me
The diagram above represents the phases of the moon. Position 1 represents the
new moon. Positions 2 through 8 represent the phases of the moon that follow.
Which phase does position 8 represent?
Answer:
waxing crescent
Explanation:
Position 8 represents waxing crescent phase. It is observed after a new moon and can be observed until the first quarter of moon.
What are the phases of moon?The waxing and waning nature of the moon is responsible for its various phases. This is due to the fact that moon is the only natural satellite of the earth. It revolves around the earth in a fixed orbit.
As earth revolves around the sun, the sunlight that falls on moon makes us visble those parts. Thus, it appears that moon is changing its shape.
A lunar month which is of 29.5 days usually is contains four primary and four intermediate phases. It is described as: New moon, Waxing crescent moon, First quarter, Waxing gibbous moon, Full moon, Waning gibbous, Last quarter and Waning crescent moon.
These phases have specific time in which they can be observed in the sky. New moon is an exception, as no part of the moon is visible then.
The phases of the moon are therefore considered as astronomically important.
Learn more about moon, here:
https://brainly.com/question/2424777
#SPJ5
what do you notice when moving the slide around the stage?
Answer:
It's the same there is no change.
What are proteins made from?
Answer:
amino acids
Explanation:
Answer:
proteins are built from a set of only telwenty amino acid ,each of which has a unique side chain.The chain of amino acids have different chemistries
What are the roles of a decomposer? Check all that apply.
1) Decomposers kill harmful microorganisms.
2) Decomposers break down waste and dead organisms.
3) Decomposers provide oxygen to the atmosphere.
4) Decomposers convert sunlight into food energy.
5) Decomposers recycle nutrients in the environment.
Answer:
2) Decomposers break down waste and dead organisms.
Explanation:
I hope this helps :)
Answer:
2 and 5
Explanation:
PLS HELP
Place the following images in the chronological order that represents the process of pollination.
Question 4 options:
2, 3, 1, 4
3, 2, 4, 1
1, 2, 3, 4
2, 3, 4, 1
Answer:
1 4 2 3 sorry if i am wrong i hope it is wright
PLEASE HELP ASAP! WILL GIVE BRAINLIEST TO CORRECT ANSWER! HELP!! HELP!!
The diagram shows the structure of an animal cell.
The image of an animal cell is shown with some organelles labeled numerically from 1 to 6. The outer double layer boundary of the cell is labeled 1. A stacked disc like structure is labeled 2. A broad rod shaped structure with an irregular shape inside it is labeled 3. The entire plain section that forms the background of the cell and is within the outer boundary is labeled 4. A small circular shape within the large circular shape is labeled 5. The large central circular shape is labeled 6.
Which number label represents the cell membrane?
1
2
4
6
(this is middle school science)
Answer:
4
Explanation:
Answer:
4
Explanation:
I took the test
3. Vaccines stimulate the body to produce...
Answer:
Antibodies
Explanation:
lets your body figure out how to be immune to the disease.
Hope that helps