Answer:
Cells are so little, so they can maximize their ratio of surface area to volume. Smaller cells have a higher ratio which allow more molecules and ions move across the cell membrane per unit of cytoplasmic volume. Cells are so small because they need to be able to get the nutrients in and the waste out quickly.
Explanation:
i think this is the answer so yeah:D
Answer:Cells are small because they are more efficient as smaller entities. Information within small cells is transmitted more quickly and efficiently than within larger cells. The nucleus or "command center" of the cell initiates cellular activity by converting genetic information into functional molecules, such as proteins. These proteins and other molecules are then directed around the cell to perform specific functions. The larger the cell, the longer these proteins and other cellular processes will take to carry out their functions. This is quite energy expensive and a less than ideal situation; therefore, cells tend to be relatively small.
As cells increase in size, the volume increases by a power of 3, whereas the surface area increases by a power of 2. This expansion results in a lower surface area-to-volume ratio that is less efficient for transmitting information through cells. Information coming into, traveling through or exiting cells must traverse a much greater distance (through the increased volume) to reach its final destination. Thus a higher cell surface area-to-volume ratio, i.e., smaller cell size, is desired for most efficient cellular activity. Additionally, and importantly, the smaller surface area and larger volume of larger cells does not permit enough molecules to pass in or out of the cell. Because information can enter or exit a cell through it's plasma membrane, the greater the surface area-to-volume ratio, the more molecules that can enter or exit per unit of volume. This is also much more efficient for cells.
Explanation:
In non-medelian genetics, chickens have a trait for feather color. Black is dominant and so is white. The heterozygous version of the bird has a checkered pattern which shows both white and black feathers. If I crossed a black chicken with a checkered chicken, what percentage of the children would be white feathered?
A. 0%
B. 25%
C. 50%
D. 100%
Answer:
25%
Explanation:
I know this for sure
If the lionfish population keeps rising, what would be the possible effect on the trophic levels of
the ecosystem?
Answer:
As lionfish populations grow, they put additional stress on coral reefs. For example, lionfish eat herbivores, and herbivores eat algae from coral reefs. Without herbivores, algal growth goes unchecked, which can be detrimental to the health of coral reefs.
Explanation:
The lionfish are eating other consumers, so the native consumer populations are dwindling. This decrease can have a ripple effect. Larger predatory animals may not have enough food to eat because the native species are decreasing.
BRAINLIEST - ANSWER QUICKLY
Read the following:
Most plants grow in soil. They take in sunlight and carbon dioxide through their leaves and nutrients through their roots. Hydroponics is a method of growing plants without soil. Plants are placed in water instead of soil. Even without soil, they still grow.
Select all of the following statements that are correct based on your reading.
Question 6 options:
1. Plant roots take in energy from water in the soil.
2.Plants take in nutrients from the sun through their leaves.
3.Plants take in nutrients from water even without soil.
4.Plant leaves take in carbon dioxide from the air.
5.Plant leaves take in carbon dioxide from water.
6.Plants take in energy from the sun through their leaves.
7.Plant roots take in nutrients from water in the soil.
Answer: 2, and 6 are correct
Explanation: Ur welcome!
Do I get brainliest now?
Answer:
2 and 6
Explanation:
Hope this helps!
cold ocean currents generally come from
Warm ocean currents originate near the equator and move towards the poles or higher latitudes while cold currents originate near the poles or higher latitudes and move towards the tropics or lower latitudes. The current's direction and speed depend on the shoreline and the ocean floor.
When you catch a cold, your body fights the cold virus and tries to eliminate is as quickly as possible. Why does your body react this way to a virus?
during breathing cycle what is the advantages of residual volume of air in lungs
During breathing cycle, the residual volume of air in lungs provide the advantage as it prevents the lungs from collapsing. Also, due to the presence of residual volume, there is sufficient time for oxygen to be absorbed and for the carbon dioxide to be released during breathing.
Hope it helps!
A certain flower can be red, white, or pink, and can also possess petals that are half one color and half another color. However the flowers that are solid color are homzygous. Flower color must be determined by:
(Multiple Choice)
1. Codominance
2. Multiple alleles
3. Dominance
4. Incomplete Dominance
Answer:
e
e
Explanation:
Based on your answer to Q3, how many of those units does each of the above have?
i have no idea what ur talking about i will edit my answer if u give me more info
This transportation process requires the cell to move particles from low concentration to high concentration. active transport facilitated diffusion osmosis diffusion
Answer:
During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.
Explanation:
This may help you out! :)
active transport...hope this helps!!
When Edna's great-grandfather returned from World War I, the family recalls that he would sometimes think that he
heard gunshots or cannon fire and would dive for cover without warning. Edna's great-grandfather was probably
suffering from
shell shock, which nowadays is referred to as post traumatic stress disorder
shell shock, which nowadays is referred to as post war stress illness
O general anxiety disorder
substance-related psychosis
Answer:
The first one is correct...
Answer:
Edna's great-grandfather was probably suffering from shell shock, which nowadays is referred to as post traumatic stress disorder
Explanation:
16. The main component of plasma is
1 oxygen
2 protein
3 water
4 gases
Answer:
the main components of plasma is oxygen❤❤❤❤❤❤❤❤
Which organ does not fit with the rest?
Group of answer choices
nerves
skin
brain
spinal cord
What type of cells reproduce by mitosis
In mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells, same number chromosomes.
What is chromosome ?
A chromosome is defined as a thread-like structure present in the nucleus of cells such as both prokaryotic and eukaryotic cell and it is made of a molecule of DNA (Deoxyribonucleic acid) and histone proteins.
It is composed of three components, DNA, proteins and RNA, amount of the DNA content ranges from 30 to 40 %, the amount of proteins from 50 to 65%, and small amount of RNA from 1 to 10%.
Two types of protein present in DNA such as histone and non-histones proteins, histone constitute large amount (90% of total protein), whereas non-histone is present in small amount (around 10% of total protein).
The histone protein is basic, whereas, the DNA is acidic, so it can be neutralized; DNA in chromosome is present in two forms such as Euchromatin and Heterochromatin.
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the number of two digit is equal to four times the sum of digits. if the product of digits is 8 .find the number.
Answer:
I think you are only intended to find
24
Explanation:
10x + y = 4(x + y) Remove the brackets
10x + y = 4x + 4y Subtract 4x from both sides
10x - 4x + y = 4x - 4x + 4y Combine like terms
6x + y = 4y Subtract y from both sides
6x + y - y = 4y - y Combine
6x = 3y Divide by 3
6x/3 = 3y/3
2x = y
Put this result in the equation below
x*y = 8
x(2x) = 8
2x^2 = 8 Divide by 2
2x^2/2 = 8/2
x^2 = 4 Take the square root.
√x^2 = √4
x = ± 2
y = 2*x = ±4
Answer
The plus answer for x and y is the one we'll see about first.
10x + y = 20 + 4 = 24
24 =? 4(2 + 4)
24 =? 4*6 = 24
The product of it's digits = 2 * 4 = 8.
24 is definitely one answer.
========================
What about -2 and - 4
-24 = 4(-2 + -4)
-24 = 4*-6 = -24
That works as well
Indicate whether each source is reliable or unreliable. A scientist who studies dinosaurs presents her research on velociraptors at a science convention. unreliable A chemistry teacher discusses plant cells on his personal blog. unreliable An advertisement for weight-loss pills in a magazine claims that you will lose 10 lbs in one week. An article discusses photosynthesis in an encyclopedia. An article discusses salmonella on the Centers for Disease Control and Prevention (CDC) website.
Answer:
A scientist who studies dinosaurs presents her research on velociraptors at a science convention. reliable
A chemistry teacher discusses plant cells on his personal blog. unreliable
An advertisement for weight-loss pills in a magazine claims that you will lose 10 lbs in one week. unreliable
An article discusses photosynthesis in an encyclopedia. reliable
An article discusses salmonella on the Centers for Disease Control and Prevention (CDC) website. reliable
Explanation:
Two important things to look out for in order to establish the reliability of a written work is to
Check the sourceCheck the authorThe advertisement does not come from a trusted source hence it is an unreliable information. The chemistry teacher is not an expert in biology hence the article on plant cells is unreliable.
The CDC is a credible organization and is well qualified to discuss matters surrounding disease outbreaks hence a publication on their website is reliable. An encyclopedia is authored by experts in a field hence its contents are reliable. A scientist who studies dinosaurs is an authority hence his/her presentation at a seminar is reliable information.
Answer:
1.reliable
2.unreliable
3.unreliable
4.reliable
5.reliable
Explanation:
Some transcription signals are located thousands of base pairs upstream of the gene they regulate. How does the distant signal initiate transcription
Answer:
enhancer sequences bind to transcription factors to increase the likelihood of transcription
Explanation:
Enhancers are short DNA regions (50–1000 bp) that may be localized upstream and downstream from the transcription start sites of the gene. It has been shown that enhancers can be localized several kilobases (30-100 kb) either 5' or 3' of the gene. These sequences bind to proteins (generally transcription factors) in order to alter the 3D structure of the DNA, thereby increasing the likelihood of transcription.
Briefly explain the difference between "breath-
ing" and "respiration".
Answer:
respiration takes place in the cells and breathing is an action where you inhale and exhale from you airways
Answer:
There are the same thing. Respiration is the process of breathing out and in. "breath-ing" could be determined as breathing in or out, maybe both. There aren't any differences that i know of.
5. A molecule whose ends have opposite electric charges is called a ____ molicule
A molecule that contains atoms with different charges is called a polar molecules because one pole is positive and the other is negative.
1. What is the role of sanitation and snails in maintaining
Answer:
Schistosomiasis is a disease caused by infection with blood flukes of the geneticist Schistosomiasis. Transmission of, and exposure to, the parasite result from fecal or urinary contamination of freshwater containing intermediate host, snails, and dermal contact with the same water.
Explanation:
Snails can carry diseases such as angiostrongyliasis, clonorchiasis, fascioliasis, fasciolopsiasis, opisthorchiasis, paragonimiasis, and schistosomiasis. Be cautious when stepping into freshwater, because there may be snails in it. I recommend not picking up or touching snails.
HELPPPP DONT ANSWER FOR FRE POINTS
A molecule consists of two or more atoms bonded together, while a compound consists of two or more __________________ atoms bonded together.
Choose one answer.
a. Similar
b. Different
c. Ionized
Answer:
B. different
Explanation:
trust me bro
Answer:
IDSKKK
Explanation:
For a deer study, each fawn found was fitted with a tag that monitors its movements and habits. The information is
then sent to scientists to study migration patterns.
Which best describes this use of technology?
Answer:
C. The improving technology has increased data collection and monitoring
Explanation:
Option C is the best that describes this use of technology.
In our world today, technology is helping to improve the way we do things. From data collection, manufacturing, designing, fabrication, observation, etc., technology has played a vital role. It has helped to improve the standard of living and makes work faster and easier.
From the excerpt, we discover that technology was used in deer study and it helped to increase data collection and the the way the fawn was monitored.
Answer:
C
Explanation:
hope this and have a good day
The tongue is an example of an organ that assists in the process of digestion. which of the following best describes the level of structural organization for organs like the tongue?
A. It is less complex than a tissue
B. It is more complex than an organ system
C. It is less complex than a cell
D. It is more complex than a tissue
Answer:
C
Explanation:
The level of structural organization for the tongue is that it is more complex than a tissue. So the correct option is D.
What is a tongue?
In most vertebrates, the tongue is a muscular organ on the floor of the mouth that may move in a variety of ways. It is extended and specialised in grabbing insect prey in some animals (like frogs).
While cats and certain other animals use their tongues as tools for grooming and cleaning, some reptiles' tongues serve largely as sensory organs.
The tongue is an essential auxiliary organ in chewing and swallowing, helps mammals create negative pressure in the oral canal to permit sucking, is a key carrier of taste receptors, and helps humans speak.
The mammalian tongue is formed of a complex of striated, intertwined muscles, fat, and glands, all coated in mucosal surfaces. Humans often have their front tongue ends and margins in contact with their teeth, which facilitates communication and swallowing.
Therefore the correct option is D.
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Which are examples of genetic engineering? Check all that apply.
building a rover to explore the surface of Mars
producing human insulin in bacteria
engineering an insect-resistant strain of wheat using a bacterial gene for a toxin
engineering a bridge to be corrosion-resistant using a material made from graphite, a
producing a spider protein in cow's milk and making it into a new type of thread
DONE
Intro
Answer:producing human insulin in bacteria
engineering an insect-resistant strain of wheat using a bacterial gene for a toxin
engineering a bridge to be corrosion-resistant using a material made from graphite, a
Explanation:
What type of organism did Fleming find could inhibit the growth of Staphylococcus aureus?
A plant
A human cell
A different bacteria
A fungus
Answer:
Fungus
Explanation:
Flemming found that the growth of bacteria Staphylococcus aureus is inhibited by fungus Penicillium notatum . Then he isolated antibiotic penicillin from that .
2.
Water consists of hydrogen and oxygen bonded together. Therefore water is a(n) *
(1 Point)
What is the answer to this?
Explanation:
carbohydrates
hope it helps
HELP ASAP PLS!!!! Which option identifies the most likely the cause of injury in the following scenario?
Sarah, who just turned 70, broke her elbow playing ice hockey with the neighborhood woman's league.
O Since menopause, Sarah's levels of the hormone testosterone have increased
O Since menopause, Sarah's levels of the hormone estrogen have increased.
O Since menopause, Sarah's levels of the hormone testosterone have dropped.
O Since menopause, Sarah's levels of the hormone estrogen have dropped.
Answer: Since menopause, Sarah's levels of the hormone estrogen have dropped.
Explanation:
The most likely cause of injury in the following scenario is that because of the menopause, Sarah's levels of the hormone estrogen, which is also known as a female hormone, have dropped and because of that she is playing ice hockey with others and since she did not play it before, she broke her elbow.
She broke it because she was inexperienced with it and if she has played it before menopause she could not break it.
Which process removes carbon from the atmosphere and then it into glucose using the energy from sun
Answer:
Explanation:
Wild guess. Photosynthesis
what are the scientist doing incorrectly? what could they do to make their work in the lab safer? why is it important to follow these procedures? part c
Answer:
What the scientist is doing incorrectly is placing test tubes in a cabinet in disorderly form, without protective or biosafety equipment, having other tubes loose on the shelf, which can fall, break and spill their contents.
Explanation:
The image scientist is doing an incorrect procedure because
He is handling laboratory material without protection. He has messy tubes on the shelf of the cabinet, which can be chewed and broken, spilling their contents. He is not using a ladder to reach the highest spaces in the cabinet and place the tubes.What could they do to make their work in the lab safer?Use biosafety equipment to handle containers with chemical or biological substances.Keep the tubes in racks or tube holders to prevent them from falling accidentally.Place the tubes in an orderly manner, using a ladder to place the tubes at the top of the cabinet.Why is it important to follow these procedures?It is important to follow these procedures to protect his body from accidental spills, as well as to avoid breaking containers and contaminating the work space.
Which of the following is NOT occurring during interphase?
Answer:
The nucleus replicates.
Explanation:
Replication of the nucleus does not happen during interphase.
Hope this is correct!