Practice 2: which answer best describes another function of the
cell membrane?
a. the cell membrane helps to protect only plant cells from larger
molecules
b. the selective barrier allows small molecules to enter and exit in animal and plant cells
c. animals cells have as thick cell membrane to keep the cells rigid
d. the cell membrane keeps material from entering and exiting the cell
Answer:
The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.
Explanation:
HURRY
Look at this diagram of sulfur. What is the most likely thing that will happen to complete the outer shell?
options:
donate 2 electrons
donate 6 electrons
accept 6 electrons
accept 2 electrons
Answer:
Accept 2 electrons
Explanation:
Elements are most stable when their valence shells are filled. Since sulflur lies within the third row in the p-block, it wants 8 valence electrons. However, according to the diagram, it only has 6 valence electrons. The simplest way to having a filled outermost shell is the one which involves the least amount of electrons being added or donated to the element. In this case, the fastest way to a stable element is by adding 2 valence electrons (6 + 2 = 8).
Which of the following is something you should do after severe weather occurs?
Clean up flood waters.
Cleaning up will always be the step after the storm. Assuming they're talking about a hurricane, then the flood waters would need to be cleaned up. Besides for the last choice (which is utterly ridiculous!), those should be before and during the storm.
Depending on where you live and what kind of sever weather you encounter, a safety plan for you and your family is a must. You should always know where you can go to be safe from the elements and what to do during severe weather.
During the storm, stay away from windows. This pertains to all weather, including those with wind and lightning. Wind could blow debris that could possibly shatter glass and hurt you or others. With lightning, if it strikes the window, it will shatter it, merely from the heat of the contact.
Select the correct answer.
Historically, the earth's ocean had a pH of 8.2. In recent years, it has dropped to 8.1. How might this change affect the ocean environment?
OA. The skeletons of coral will become soft due to increased acidity.
OB. The rise in alkalinity will make the ocean unfit for certain ocean plants.
Oc At 8.1, the ocean has reached neutral pH, making it identical to pure water.
OD. The ocean's CO2 content will decrease, improving the environment for animals.
The effect of this change of pH value in the ocean environment will be experienced by: (A). The skeletons of coral will become soft due to increased acidity
Meaning of pH value
pH value can be defined as the values that tells us how acidic or basic a mixture is.
pH is the measure of how acidic or how basic water is.
pH values ranges from 1-14, and each has its own significance. number 7 stands for the neutral point.
In conclusion, The effect of this change of pH value in the ocean environment will be experienced by: The skeletons of coral will become soft due to increased acidity
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Which bond type shares electrons
between the atoms?
A. ionic bond
B. covalent bond
C. proton bond
D. neutron bond
Why do viruses only infect specific types of cells?.
Order the steps of the hydropower plant below.
Answer:
water flows through a pipe, or penstock, then pushes against and turns blades in a turbine to spin a generator to produce electricity.
Answer:
Explanation:
ANSWER: water flows through a pipe, or A penstock, then pushes against and turns blades in a turbine to spin a generator to produce electricity.
Explain how parts of a whole system contribute to the function of a whole system?
Every organ system is made up of parts that contribute to the functions of the whole system.
How do parts of the system contribute to the function of a whole system?The human body is made up of many parts that have specific functions that come together to make up the whole organ system. Scientists divide them into different parts and different organ systems to better understand the individual functioning of the specific parts.
A body system is made up of body parts that work together to carry out a particular function. For example, the integumentary system that consists of skin, hair and nails that integrate together to carry out the function of protecting the body.
Another example is that of the immune system that is made up of complex organs, tissues and cells like the WBCs that form a network among each other to carry out the function of recognizing antigens and destroying them to keep infections at bay.
Two or more body systems also work together to carry out a certain function. For example the respiratory system and circulatory system come together to provide oxygen to the cells of the body and remove carbon dioxide.
This is how parts of the whole system contribute to the function of the whole system.
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List three different ways that bacteria are helpful to human
Answer:
Creating products, such as ethanol and enzymes.
Making drugs, such as antibiotics and vaccines.
Making biogas, such as methane.
Cleaning up oil spills and toxic wastes.
Killing plant pests.
Transferring normal genes to human cells in gene therapy.
Explanation:
Answer: Heyaa! ~
1. Help digest food
2. Makes vitamins
3. Cleaning up oil spills and toxic wastes.
Hopefully this helps you!
-Matthew ^^
HURRY
Oxygen and carbon combine to form different compounds. What type bond is formed between these two atoms?
options:
hydrogen
ionic
covalent
Answer:
C.) Covalent
Explanation:
Oxygen and carbon are both nonmetals.
A.) is incorrect because hydrogen bonds are only formed between hydrogen and either oxygen, nitrogen, or fluorine.
B.) is incorrect because ionic bonds form between nonmetals and metals. In this situation, you have two nonmetals.
C.) is correct because covalent bonds are formed between two nonmetals. A covalent bond will form because oxygen and carbon are nonmetals.
Answer:
Covalent
Explanation:
A covalent bond is formed when two non metals form, which means that's the answer. For the record, for hydrogen bonding Hydrogen obviously has to be present, and an ionic bond occurs between a metal and a nonmetal
46. Yawning may be caused by
A. high oxygen concentration in the blood.
B. high lactic acid concentration in the blood.
C. high carbon dioxide concentration in the blood.
D. high urea concentration in the blood.
Which statement accurately describes the tissues indicated by the line in the microscopic image?
The connective tissues that protect the inside of arteries and veins
The epithelial cells on the inside of arteries and veins
The smooth muscle on the outside of arteries and veins
True or False In addition to earth, many of the other planets in the solar system have atmospheres.
Answer:
true
Explanation:
however this is true the atmosphere cannot support any human life because of its content
Answer: True, some others planets too have an atmosphere.
Explanation:
Yes, it is true. Some other planets such as Mars, Jupiter, Saturn have atmospheres.
The sides of the dna molecule are made up of repeating nitrogen bases and sugars.
Answer:
BRAINLY
ME p l z
Explanation:
T or F - The sides of the DNA molecule are made up of repeating nitrogen bases and sugars. T or F - The letters that make up the DNA molecule code for genes. T or F - Replication results in two strands of DNA, each of which has half of the original strand.
Sponges possess feeding cells and structural parts that are called.
Answer:
choanocytes (“collar cells”).
Explanation:
The structure of a choanocyte is critical to its function, which is to generate a directed water current through the sponge and to trap and ingest microscopic food particles by phagocytosis.
Taxonomy is the type of classification that names and identifies different organisms primarily by their
Explanation:
taxonomy is the scientific study of naming, defining and classifying groups of biological organisms based on shared characteristics.
IANADADisdfiodpcamscayduaefasiouoias.
Answer:
The producers (plants) would be greatest in number and the tertiary consumers (carnivores) would be least in number. Because energy available to higher trophic levels decrease as we go higher.
A taxon that includes a single common ancestor and all its descendants is a _____ group.
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monophyleticWhen you use electricity in your home, which resources are powering it? Research the energy resources used to power your state’s electrical grid (that’s what supplies your home with electricity). In the space below or on a separate sheet of paper, create an informative handout to provide to the people of your state.
Include the following information in your handout:
• Which state do you live in?
• What is the population of your state?
• What percent of the electricity in your state comes from
nonrenewable resources?
• What percent of the electricity in your state comes from
renewable resources?
• What percent of the electricity in your state comes from
nuclear energy?
• Which renewable resource is used the most in your state?
• What is an interesting fact about energy usage in your state?
Answer:
Comment which state you live in an I'll be able to help
Explanation:
Can anyone help me with this question again? Thanks so much
Food is prevented from entering the trachea because:
A. Trachea will constrict during swallowing
B. Oesophagus will dilate during swallowing
C. Glottis will constrict during swallowing
D. Larynx will be raised during swallowing
A, B, C, D are the options pls choose one
give useful and solid answers pls
Why was Aristarchus’s model not accepted? Select two options.
Aristotle had better data than Aristarchus.
Aristarchus was not as famous as Aristotle.
Aristotle’s model was more accurate.
Aristarchus could not answer some important questions about the model.
Aristarchus had fallen out of favor with Alexander the Great.
Aristarchus’s model not accepted because at that time it was believed that the earth was at the center of the universe.
What is Aristarchus’s model?Aristarchus make a model by placing the place of the Sun in the middle of the solar system and placed the planets around the Sun.
So we can conclude that Aristarchus’s model not accepted because of the believed that the earth was at the center of the universe.
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The Answer is
B - Aristarchus was not as famous as Aristotle.
D - Aristarchus could not answer some important questions about the model.
How the dorsal/ventral pattern is initially established in drosophila development
The dorsal/ventral pattern is initially established in drosophila development by the gradient of a transcription factor called dorsal protein.
What do you mean by Dorsal protein?Dorsal proteins are synthesized after fertilization, when dorsal is translated, it forms a complex with a protein known as cactus in the cytoplasm.
The dorsal/ventral axis in the Drosophila is determined by morphogenesis which is established by 12 maternal effect genes along with the dorsal and cactus.
Therefore, the dorsal/ventral pattern is initially established in drosophila development by the gradient of a transcription factor called dorsal protein.
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The circulatory system helps maintian homeostasis by interacting with the
Answer:
Blood vessels
Explanation:
What is the desired temperature for incubation?
Answer:
the desired temperature for incubation is between 99° and 100°F.
if a hypothetical Colony of 100 humans isolated themselves on an island their genetic make up after several generations would be determined by?
Answer:
The founder effect.
Founder Effect: What is it?The founder effect is the lasting, reduced genetic-diversity that comes whenever a population is descended from small numbers of colonized ancestors.
HELP! Me!
Peppered moths live on lightly colored trees, lay around 100 eggs and don’t live longer than a year. How does that help them adapt and survive?
Answer:
They camouflage
Explanation:
The peppered moths adapt to their surroundings. They blend in with their surroundings to avoid being eaten by their predators. Blending in with their surrounding also helps them to sneak up on and catch their prey.
I'm not too sure why they lay 100 eggs at a time but i think it's because the parents want to increase the survival of their eggs. Eggs sometimes are eaten by other animals and the parents want at least a few to survive.
According to the theory of evolution by natural selection, which of these statements is correct?
A. Structures and behaviors evolve at the individual level.
B. Structures and behaviors evolve at the population level.
C. Structures evolve at the individual level, but behaviors evolve at the population level.
D. Structures evolve at the population level, but behaviors evolve at the individual level.
Why are scientific observations important?
1. Every experiment uses quantitative observations.
2. Every experiment begins with observations.
3. Every experiment ends with observations.
4. Every experiment uses qualitative observations.
Scientific observations are important as all scientific experiments begin with observations hence option 2 is the correct option.
Why are scientific observations important?Scientific observations are used by scientists to collect and record data, which allows them to put forth and test certain hypotheses and theories.
Scientific observations are done in many ways – by human senses or with machines and tools like microscopes, digital scanners or amplifiers to enhance their vision or hearing.
Observations make what scientists call data and they inspire, support or deny a scientific theory or hypothesis.
Hence, Scientific observations are important as all scientific experiments begin with observations hence option 2 is the correct option.
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Answer:
every experiment begins with obeservation
Explanation:
Why is the concentration of urea in urine much higher than its concentration in the glomerular filtrate
Answer:
This is caused by osmosis and re-absorption.
Where on the chromosome is the “purple eye” gene located?
Answer:
Chromosome 2
Explanation: Have any amazing day!