Answer:
option D is correct
Explanation:
cell wall is not present in all cells because it is present in plant cell but not in animal cell
Cell wall is the structure that is not found in all cells, only in bacteria and plant cells where it is attached to the plasma membrane on the outer surface.
What is a cell wall?A cell wall is a rigid structure that lies outside the plasma membrane and protects the contents of the cells of algae, fungi, plants, bacteria, and archaea.
Characteristics of a cell wallIt can be a layer of chitin (in the case of fungi), cellulose (plants), peptidoglycan (bacteria), or other materials.It is responsible for protecting the contents of the cell and absolute rigidity to the cell structure.Therefore, we can conclude that the cell wall is what covers prokaryotic cells and plant cells.
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Why are wildlife needed for animals?
Answer:
For maintaining a healthy ecological balance on this earth, animals, plants and marine species are as important as humans. Each organism on this earth has a unique place in food chain that helps contribute to the ecosystem in its own special way. But, sadly today, many of the animals and birds are getting endangered
How is osmosis utilized to
create a state of equilibrium
inside of a cell's selectively
permeable membrane?
A. Osmosis allows large molecules to
move from an area of a high concentration
to a low concentration.
B. Osmosis allows DNA to remove solutes
from a higher concentration of solutes to
low concentrations.
C. Osmosis allows water to pass through
the membrane to dilute the high
concentration of solutes.
Answer:
A. Osmosis allows large molecules to move from an area of a high concentration to a low concentration.
Explanation:
Answer:
I think the answer is B. Not to sure but, hope this helps!!!!
I have the same thing rn on Acellus. LOL
As organisms become more complex and increase in size they develop a need for a
Answer:
Recently work in evolution theory has proposed that by relaxing selection pressure, which typically acts to streamline genomes, the complexity of an organism increases by a process called constructive neutral evolution.
Explanation:
the frequency of a drum note is 20Hz. what does this tell you about the drum skin movement
Answer:
The drum skin oscillates 20 times per second
Explanation:
The frequency of a note is dependent on the mechanical activities that occur when it is produced. A drum is beaten in this case. The oscillation of the drum skin transfers sound waves to the air particles which move at the same frequency before reaching our ears.
If the frequency of the sound wave is 20 Hz this means that the wave is oscillating 20 times in one second. For the drum to produce such a sound, the skin must have been oscillating at the same frequency of 20 oscillations per second too.
Rachel wants to test how sunlight impacts plant growth over time she will add billing amount of light to different sets of plans what is the independent variable
Answer: sunlight.
Explanation: When trying to establish the level or extent of correlation or relationship which exists between two variables, the variables are classed as independent and dependent variables. The independent variable is referred to as the variable which causes a change in the value of the other variable (dependent variable). It is also known as the explanatory or predictor variable as it lead to changes in the dependent or predicted variable. In the scenario above, the independent variable is sunlight whose impact leads to changes in the growth level of the plant.
Which biotic factor would be most effective in maintaining homeostasis in an ecosystem
1. The absence of large trees
2. The presence of many ponds
3. The presence of many species
4. The absence of predators
Answer: 3. The presence of many species
Explanation:
A biotic factor that would be most effective in maintaining homeostasis in an ecosystem is as follows:
The presence of many species.Thus, the correct option for this question is C.
What is an Ecosystem?An ecosystem may be defined as a place or an area where individuals of different species live together and interact with one another for the purpose of food, shelter, and space.
Among the given options, the pond is classified as a source of abiotic factors. While the absence of trees is not favorable for any ecosystem in order to maintain homeostasis. The absence of predators makes a population grow significantly but does not maintain homeostasis, it is also not considered.
The presence of many species increases the overall diversity of any ecosystem. It also provides flexibility to the surrounding atmosphere. This statement is typically involved in the effective maintenance of homeostasis in an ecosystem.
Therefore, the correct option for this question is C.
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#SPJ2
________ is a condition in an experiment that remains the same.
Answer: Constants
Explanation:
10 Points
Which of the following is not a variable that Bioreactors control to produce large amounts of microbes?
A. Nutrient levels
.
B. Temperature
C. Ultraviolet radiation levels
D.PH
The ultraviolet radiation level is not a variable controlled by bioreactors in order to produce large amounts of microbes
A bioreactor is a vessel or tank designed to generate a suitable environment under controlled conditions (e.g., nutrients, pH, etc) for enzymes, microorganisms or animal/plant cells that convert biochemicals into products. For example, bioreactors are used in the biotechnology industry to produce different components such as beneficial microorganisms, pharmaceuticals, vaccines, and antibodies.Bioreactors can also be used for sterilization procedures (for example, in water treatment.In conclusion, option C. Ultraviolet radiation levels is not a variable controlled by bioreactors when producing large amounts of microbes
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Answer:
c
Explanation:
It can be inferred from the results of the study that 20 seconds is sufficient time for what to have occurred in green cones in the retina?
Answer:
The process of Desensitization
Explanation:
Subjects are able to perceive a residual image once the green cones in the retina get desensitized. Since every group involved in this study reported having seen a rather intense residual image, we can safely conclude that the green cones did indeed get desensitized.
All pros when conducting a lab experiment except?
a) the scientist can manipulate variables
b) the scientist can control all of the variables
Answer:
I personally believe that lab experiments are useful and an effective way to test and gather data. Even though they can often lack ecological validity and mundane realism they can easily be replicated and results can be retested, helping to prove/disprove data, ultimately leading to the creation of practical applications.
That psychologist can make statements about cause and effect because they involve the deliberate manipulation of one variable while trying to keep the other variables constant, unlike non-experimental methods.Lab experiments can also be replicated due to the standardised procedures and measures, ultimately making it easier to check the reliability of the research/results and prove/disprove results if the research is conducted by another researcher.
Peer review is best defined as the process through which scientists:
what is validity of data?
Answer:
Validity refers to how accurately a method measures what it is intended to measure. If research has high validity, that means it produces results that correspond to real properties, characteristics, and variations in the physical or social world. High reliability is one indicator that a measurement is valid.
Explanation:
Sharp claws in wild animals is an example of which type of adaptation?
Answer:
physical
Explanation:
what is the area of a room that is 4 m long and 3.2 m wide?
Answer:
12.8m
Step-by-step explanation:
Area = length × widthLength × width = 4 × 3.24 × 3.2 = 12.8mI hope this helps!
Where does the krebs cycle occur?
A. Cytoplasm
B. Mitochondrion
C. Cell membrane
D. Nucleus
Answer:
B. Mitochondrion
Explanation:
The Krebs Cycle occurs in the mitochondria during the processes of cellular respiration.
Specifically, it occurs in the matrix of the mitochondria.
Answer:
Mitochondrion
Explanation:
I took the test and it was correct
Which part of Earth is included in the hydrosphere?
air
animals
glaciers
rocks
Glaciers are included in Earth's hydrosphere.
Answer:
Glaciers
Explanation:
took test on edge
Which compounds have double or triple bonds?
N2 • CCl4 • SiO2
• AlCl3 • CaCl2 • LiBr
Answer:
1. N2 is three bonds.
2. CCl4 has four covalent bond.
3. Sio2 has 4 covalent bond.
4. Alcl3 have 1 bond.
5. CaCl2 have double bond.
6. LiBr have double bond.
Explanation:
hope it's help u plz brainlist me
A student wants to create a liquid volcano. The student observes bubbles in the soft drink prior to opening it. The student first proceeds to open the soft drink bottle and place it on the floor. Next the student drops candy tablets into the drink using a rolled piece of paper, so that the tablets are able to fall into the drink continuously. The student notices a very powerful reaction as the drink fizzes and starts to bubble In this scenario, what would be the catalyst ? O The candy tablets being added to the drink The gasses being released when the drink was first opened The piece of paper being placed over the soft drink O The container that holds the liquid
Answer: the candy tablets being added
Explanation:
just took it
The candy tablets being added to the drink would be the catalyst of the reaction in the drink.
WHAT IS A CATALYST:
A catalyst is any substance that makes the rate of a chemical reaction faster by lowering the activation energy needed for the reaction to occur.Catalyst makes a reaction proceed faster than usual. In this case, a student who wants to make a liquid volcano notices bubbling in a sealed drink bottle. She then opens it and began to add candy tablets using a rolled piece of paper.She notices that a very powerful reaction occured as she constantly puts the candy tablets in the drink. This suggests that the catalyst of this reaction in the drink is the CANDY TABLETS.Learn more: brainly.com/question/1565029?referrer=searchResults
Digestive system plays one of the major functions of the body. Write down the importance of the digestive system to keep your body healthy. Instruction: Write down the answer in minimum 60 words. quick due tomorrow
Answer:
The digestive system plays one of the major functions of the body. Without it, you couldn't be able to get the nutrients you need to grow properly and stay healthy. It is very important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. Foods and drinks must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body.
Drag the tiles to the correct boxes to complete the pairs.
Match the types of societies to their characteristics.
dependent on wild plants and animals for their sustenance
dependent on agriculture for its livelihood
dependent on manufacturing sector for income
1)agrarian society
2)modern society
3)hunter-gatherer society
See photo,
Explanation:
what is megaphylls and write the functions of it
Answer:
Generally, the main function of both microphylls and megaphylls is to undergo photosynthesis. In comparison, the main structural feature of megaphylls is the presence of multiple veins. Also, they contain leaf gaps.......
Which of the following are branches in the study of biology?*
1) botany, cell biology, ecology, and zoology
2) the genetic code, evolution, and the biosphere
3) cells, tissues, organs, and organisms
4) populations, communities, and ecosystems
In corn, smooth kernels (K) are dominant to wrinkled kernels (k). A farmer crosses two corn plants that are heterozygous for kernel texture. What are the odds that the offspring will have smooth kernels? Choose 1 answer:
Answer:
75% will have smooth kernels
Explanation
3 out of 4 of the offspring will have the dominant trait of smooth kernels. So, 75%.
Answer:
3/4
Explanation:
i just did it on kahn academy and it was right
1/4x+7/4x-25+3x
PLEASE HELP ASAP
Answer:
-25+5x
Explanation:
hey if you need more help like this use M a t h w a y its helpful !
Answer:
5x-25
Explanation:
You have to add the numbers with the same variable. Add 1/4, 7/4, and 3 together because they have the same variable of x. Don't do anything to the -25 because it doesn't share the same variable, leaving you with 5x-25
Describe at least two biological systems. Explain how the systems are independent from an interconnected with each other.
The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide. The primary organs of the respiratory system are the lungs, which carry out this exchange of gases as we breathe. The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
Biological systems are made up of group of organs that perform a particular function.
Biological systems are peculiar to higher organisms. Examples include:
Digestive system: this system consists of organs that brings about the assimilation and digestion of food. It carries out this function through the mouth, stomach, small intestine and large intestine.irculatory system: this system serves the basic function of transporting soluble food, excretory products and oxygen, throughout the body. This system consists of the heart, arteries, veins and so on.The division of labour in the body systems leads to efficiency of their various functions.
But the two biological systems mentioned above are interconnected. Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System which then carries those nutrients where they need to go.
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Which statement explains one difference between marshes and bogs? Marshes are highly acidic, while bogs are not. Bogs look like flooded forests, while marshes contain grasses. Marshes can contain fresh water, while bogs contain salt water. Marshes are areas of shallow water, while bogs are deeper areas.
Answer: D. Marshes are areas of shallow water, while bogs are deeper areas.
Explanation: On Edge!!
The statement that explains one difference between marshes and bogs is : ( D ) Marshes are areas of shallow water while bogs are deeper areas
What are Marshes and Bogs ?Marshes are areas of land/ground covered by water for a long period of time. They are similar to swamps but are treeless and only inhabited by herbaceous plants such as grasses and reeds. While
Bogs are areas that are often covered with water and are too soft that they cannot support a load placed on it, hence they are deeper areas when compared to Marshes.
Hence we can conclude that The statement that explains one difference between marshes and bogs is Marshes are areas of shallow water while bogs are deeper areas
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Column A
Column B
1.
a
А
a. Single
Benth
b. People
2. 3.
Carn
C. Before
4.
Dem
d. Idea
5.
Ecto
e. Meat
BG
Fore
f. Sex Cell
7
Gam
g. Deep
8
Haplo
h. Nucleus
9.
Ideo
Without
10.
Karyo
je Outside
Answer:
Explanation. colom a
Identify two distinguishing factors of a nearby ecosystem, and name five kinds of organisms that live in that ecosystem.
Evaporation of sweat cools the skin because A. Liquids reduce the average kinetic energy of a surface by slowing down molecular movement. B. Liquid water is always at a lower temperature than solid substances under the same conditions. C. The molecules with the highest energy of evaporate first, lowering the temperature of the sample. D. The movement of the molecules during evaporation lowers the skin’s temperature.
The answer is option C.
a gas that the lungs take from the air for the body to use is called?
Answer:
Oxygen
Explanation:
Oxygen is taken in from the air and enters the lungs then the bloodstream; it is then carried out throughout the body.
Answer:
[tex]\huge\boxed{Oxygen}[/tex]
Explanation:
Oxygen is taken by the lungs from the air for it to be used by the body. Oxygen enables us to breath and thus is an important bio-element. We need oxygen as an essential part of our life.