Answer:
Explanation:What’s a cell? Well, on some level, it's a bag of goo. The plasma membrane—the outer boundary of the cell—is the bag, and the cytoplasm is the goo.
Of course, a cell is ever so much more than just a bag of goo. It's a complex, highly organized unit, the basic building block of all living things. And the plasma membrane and cytoplasm are actually pretty sophisticated.
The membrane is a delicate, two-layered structure of lipids and proteins, and it controls what can enter and exit the cell. Similarly, the cytoplasm of a eukaryotic cell consists not only of cytosol—a gel-like substance made up of water, ions, and macromolecules—but also of organelles and the structural proteins that make up the cytoskeleton, or "skeleton of the cell."
In this article, we’ll take a closer look at the plasma membrane and cytoplasm.
The plasma membrane
Both prokaryotic and eukaryotic cells have a plasma membrane, a double layer of lipids that separates the cell interior from the outside environment. This double layer consists largely of specialized lipids called phospholipids.
A phospholipid is made up of a hydrophilic, water-loving, phosphate head, along with two hydrophobic, water-fearing, fatty acid tails. Phospholipids spontaneously arrange themselves in a double-layered structure with their hydrophobic tails pointing inward and their hydrophilic heads facing outward. This energetically favorable two-layer structure, called a phospholipid bilayer, is found in many biological membranes. [Close-up of a phospholipid]
As shown below, proteins are also an important component of the plasma membrane. Some of them pass all the way through the membrane, serving as channels or signal receptors, while others are just attached at the edge. Different types of lipids, such as cholesterol, may also be found in the cell membrane and affect its fluidity.
Which of the following best describes the relationship between the shape of enzymes and the reactions they catalyze? (5 points)
Group of answer choices
The shape of an enzyme depends on the reaction that it needs to catalyze.
Enzymes with more active sites can catalyze several reactions at once.
The shape of an enzyme determines which reaction it can catalyze.
Enzymes change shape after they catalyze a reaction and become waste products.
Answer:
The shape of an enzyme determines which reaction it can catalyze.
Explanation:
Enzymes are regenerated at the end of the reaction.
Which labels would correctly model photosynthesis?
Answer:
A. Carbon dioxide
B. Light energy
C. Oxygen
D. Glucose
E. Water
Explanation:
The model for photosynthesis is the sun in the form of solar energy where the carbon dioxide along with gets formed in the leaves where it is kitchen of the leaves along with the carbon dioxide gets removed out.
What is the primary source of energy ?The primary source of energy is the sun which will help in the production of biomass.
A. Carbon dioxide
B. Solar energy
C. Oxygen
D. Stomata
The photosynthesis is the unit where the solar energy is the producers energy used by the producers. Carbon dioxide is the gas that is the used to the plants that is synthesizing plants food.
Leaves have the stomata where the food is being synthesized where the chlorophyll containing pigment is helpful in making where the food is being synthesized.
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The fish in the first bowl couldn't have baby after baby after baby forever. The bowl filled up with fish and many fish died. A bowl this size can only keep three fish alive. What is it called when an area/home/ecosystem has a limit to the number of living things that can live there?
Answer: Carrying capacity
Explanation:
The carrying capacity can be defined as the ability of an ecosystem to sustain a particular number of members of the population of species in terms of availing resources for survival.
According to the given situation, the fish bowl is an ecosystem which can only sustain a particular number of fishes. Thus, the increase in the population of baby fishes was not supported by the fish bowl.
what transport moves ions?
- diffusion
- facilitated diffusion
- osmosis
- molecular pumps
- endocytosis
- exocytosis
Answer:
a facilitated diffusion
Sorry If I'm wrong
Plants like the stinging nettle seen here have sharp, needle-like hairs that inject a burning chemical into animals that touch the stems or leaves. These hairs are used for A) protection. B) reproduction. C) photosynthesis. D) attracting insects.
Answer:
A. Protection
Explanation:
These plants have this external protection system to protect them against being eaten by these animals.
In cases where these plants are approached to be eaten by these animals, these systems which in this case are these hairs tend to make an effort by discomforting the approaching animals.
The animals upon sensing this discomfort retreat from feasting on these plants which thus prolongs their lives and prevent them from being eaten by these animals
please helpppppp meeee
Answer:
what happened my friend is everything fine well 1 + 1 equals 2 got it?
A statement of fact meant to explain an action or set of actions about nature .
A. Laws
B. Hypothesis
Answer:
A. Laws
Explanation:
Answer:
Laws
Explanation:
A hypothesis is a guess based off of background knowledge while laws are strictly facts.
why is it important to understand the breakdown of water into its ions before learning about acidity
Animals and plants that are unable to adapt to their environment will become
A- Prey
B- A new species
C- Extinct
D- Hungry
I think A or C
Explanation:
It really depends on how the question is phrased. Animals and plants that are unable to adapt to their enviroment will become- Hold it right there. How long will they be unadaptable? Is this forever? If so then yes, they will definately become extinct. If this is for a short amount of time then no, they will become prey, but there is also the fact that yes, they will become hungry. Because if they are not adapted then how are they gonna know the best sports for grub? Same thing for plants, if they can't adapt to the climate, they cannot produce food for themselves. Basically, if its a simple question then forget about everything else. It's Prey, because animals that can't adapt to their enviroment are immedietly in danger. Now if this question has more to it then I would go for C. But overall Just go with prey for now.
If an H is for tall trait which is dominant and h is the recessive trait for short,
which of the following crosses will result in 1:1 tall:short progeny (offspring).
A) HH Xhh
B) hh X hh
C) Hh X hh
D) Hh X Hh
Answer:
The cross that guarantees a height trait ratio in the offspring of 1 : 1 high/low is Hh X hh (option C).
Explanation:
For a characteristic such as size, where tall (H) is the dominant trait and short (h) is the recessive, the crossing of a tall heterozygous (Hh) individual with a short one will have a probability that half of the offspring will be tall and the other half short.
This can be demonstrated with a Punnett square:
Cross Hh X hh
Alleles H h
h Hh hh
h Hh hh
Based on this result, half of the offspring will be tall, with genotype Hh, and the other half short, with genotype hh, which corresponds to a tall : short ratio of 1 : 1.
In the other options is not possible to obtain this result:
A) HH Xhh = 100% Hh.
B) hh X hh = 100% hh.
D) Hh X Hh = 50% Hh, 25% HH and 25% hh.
Dr. Kettlewelll predicted that clean forests would have _____________ colored moths, and polluted forests would have _________ colored moths.
Answer:
Kettlewell thought that if natural selection caused the change in the moth population, the following must be true: Heavily polluted forests will have mostly dark peppered moths. Clean forests will have mostly light peppered moths. Dark moths resting on light trees are more likely than light moths to be eaten by birds.
Dr. Kettlewall predicted that clean forests would have light-colored moths and polluted forests would have dark-colored moths. This is an example of natural selection.
What is natural selection?Natural selection is a phenomenon in which the fittest individual is chosen by nature. The animal can live and reproduce in that particular environment. An example is the peppered moth population.
The light-colored moths were found on the light-coloured bark, but their population started to decline after the pollution. In the polluted environment, they were easily chosen by predators. So only dark moths survived because they blended in with the polluted environment.
Following the end of the pollution, light colored moth increased again. Predators had a difficult time identifying the light moth because it blended in with the unpolluted environment. Hence, their population increases in unpolluted areas.
Hence, Dr. Kettlewall predicted that a clean forest would have a light-colored moth and a polluted forest would have a dark-colored moth.
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The chemical reaction equation of photosyntesis is shown here:
6CO2 + 6H2O → C6H12O6
What information is not given in this equation.
A)It does not show if the reaction is reversible or not reversible.
B)It does not show the reactants needed for the reaction.
C)It does not show that photosynthesis consists of many separate steps.
D)It does not show the number of molecules required to produce glucose.
Answer:
C
Explanation:
C appears to be the best answer but I think a better answer would be that it didn't include another product which is oxygen. So unless it is late and my brain is not function, I would say that should be the answer. But otherwise, since it is not there, C is the best one I think.
The chemical reaction equation of photosynthesis is shown here:
6CO2 + 6H2O → C6H12O6, C)It does not show that photosynthesis consists of many separate steps. Thus option "C" is correct.
What is photosynthesis?
The chemical reaction of photosynthesis is given as follows;
6CO₂(g) + 6H₂O(l) + Energy from light → C₆H₁₂O₆(s) + 6O₂(g)
Therefore, six molecules of gaseous carbon dioxide (CO₂) combine with six molecules of liquid water (H₂O) in the presence of energy from Sunlight to produce one molecule of solid glucose (C₆H₁₂O₆) and six molecules of gaseous oxygen (O₂)
The 6O₂ is the gaseous oxygen produced as a byproduct of photosynthesis
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Which pair of properties apply to both mechanical and electromagnetic waves?
A.
Both waves carry energy and refract
B.
Both waves are longitudinal and refract
C.
Both waves are transverse and carry matter from one place to another
D.
Both waves carry energy and do not need a medium to travel through
Answer:
A. Both waves carry energy and refract
Explanation:
There are two major types of waves viz; mechanical waves and electromagnetic eaves. Mechanical waves such as sound waves are waves that require a medium or matter to pass/travel through while electromagnetic waves like light waves do not strictly require a medium to travel i.e through vacuum.
Electromagnetic waves are transverse waves i.e their particles move perpendicularly to the direction of the wave while mechanical waves can either be transverse or longitudinal. All waves carry energy from one medium to another and are capable of refraction i.e. change of direction.
Therefore, both mechanical and electromagnetic waves carry energy and refract.
What groups of organisms are most in danger of extinction?
A. Those with small population
B. Those that migrate or need special habitats
C. Those with large populations that breed quickly
D. Both a and b
Explanation:
D.Both a and B
As organisms with small population and those who migrate and need special habitat are most in danger of extinction.
The group of organisms that are in danger of extinction is those that have small populations and those that migrate or need special habits. So the correct option is D.
What is the extinction of species?
In biology, extinction refers to the extinction or death of a species. Extinction happens when a species' numbers are reduced due to evolutionary changes in its members, such as genetic inbreeding, poor reproduction, and population decline, or due to environmental factors like habitat fragmentation, climate change, natural disasters, and overexploitation of the species for human use.
The majority of species that have ever existed on Earth have gone extinct, but the fossil record indicates five very significant extinctions, known as mass extinction events, each of which resulted in the extinction of enormous numbers of species. The bulk of extinctions, which happen continuously and are described as background extinctions, are separated from these glaring decreases in the variety by the term "mass extinction."
Therefore, the correct option is D.
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true or false?
with explanation
Answer:
true
Explanation:
the body has the means of producing insulin but cannot due to either a hormonal imbalance or deficiency thus raising their levels
How does the Golgi Body and Plasma membrane work together ?
Answer/Explanation:
The Golgi body is a system of flattened sacs that is involved in the packaging, modification, and transport of proteins. It is particularly important for proteins that have to be transported outside of the cell.
Proteins from the Golgi that are to leave the cell are transported in vesicles. When they reach the membrane, the vesicles fuse with it and release the proteins outside of the cell
The concentration of urea in g per 100 cm3 in part A is 0.03, and in part C is 2.00.
How many times more concentrated is the urea in part C compared with part A?
By which process does the blue ink spread through the jelly?
Answer:
Diffusion
Explanation:
Diffusion is the process through which the ink is dissolved into the water. It plays an important role in transferring of the solution from area of low concentration to the higher concentration.
PLEASE HELP WILL MARK BRAIN
(ANSWER APPROPRIATELY)
Answer: If a land fertilizer were used on the algae it would severely damage the plant and suffocate it.
Explanation: Fertilizers are used by homeowners to maintain and improve landscape beauty and quality. In recent years, increased use of home lawn and garden fertilizers has caused concern about pollution of lakes and groundwater. Proper fertilizer application can enhance plant growth without polluting the environment. Yet, misuse of fertilizer may not only harm the environment—especially ground and surface water—but may in fact result in injury to landscape plants as well. The nutrient phosphorus harms clear, free water by creating algal blooms. This process, known as eutrophication, turns the water green, clouds the water, causes odor problems, and depletes the oxygen for fish and other species, effectively suffocating them.
Answer:
Well knowing that most fertilizers help algae grow, my prediction is that the algae expectantly grow at a high rate. The rain would also help the growth and might even get the algae in the water systems.
Explanation:
In a particular organism, scientists notice that cells are dying at a higher rate than normal. Upon further examination, they find that these cells die after they became filled with large lipids and protein of many different sizes. what do you predict is the reason for the cells death apex
Answer: lysosomes are malfunctioning so molecules targeted for destruction are not being removed.
Most mammal cells divide at a rate of
Mammals have a slow rate of division that is between 12 and 24 hours. These cellular divisions are asynchronous. Zygotic transcription starts at the two-, four-, or eight-cell stage. Cleavage is holoblastic and rotational.
Which concept is not a part of the theory of evolution?
A. Present-day species developed from earlier species.
B. Some species die out when environmental changes occur.
C. Complex organisms develop from simple organisms over time.
D. Change occurs according to the needs of an individual organism to survive.
Answer:
D. Change occurs according to the needs of an individual organism to survive.
Why are there fewer tuskless elephants born after the war (ages 10-20 years old)?
Elephant tusks are either present or absent due to genetics, specifically the existence of key genes that regulate tusk growth. Environmental elements, however, can also affect the proportion of tuskless elephants in a population.
Elephants are frequently hunted down during conflicts or wars for their ivory tusks, which are highly sought-after on the illicit market. Over time, the population of elephants with tusks may decline as a result of this selective hunting of those with them.
The age range of 10 to 20 years old is essential because it coincides with the period of time when elephants usually begin to grow their tusks. Around the age of 6 to 8 years, young elephants may start developing their tusks, and by the time they are 10 to 20 years old, their tusks should typically be more noticeable and developed.
It is possible that many young elephants with developing tusks will be killed if a conflict or a period of rampant poaching takes place during this crucial time, which will reduce the number of tusked elephants in the population. After such a conflict or a period of heavy poaching, there can be a larger percentage of tuskless elephants between the ages of 10 and 20.
This theory makes the assumption that there was greater poaching or selective hunting occurring during the conflict, which would have a disproportionately negative effect on elephants with tusks. In order to provide a more comprehensive knowledge of the issue, additional examination of local conditions and data would be required. The individual situations and variables affecting elephant populations can differ.
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Please help(due today)
Answer:
I would say A
Explanation:
it makes the most sense to me sorry if im wrong.
Which component of nerve cells contains the nucleus? (1 point)
dendrite
axon
neuron
cell body
The nucleus is present in the cell body.
Nerve cell:Nerve cell is a basic unit of communication. Each nerve cell contains axon, cell body, dendrites and terminal branches. There are about 85 to 200 billion neurons present.
Neurons are surrounded by a cell membrane.Neurons have a nucleus that contains a gene.It also have cytoplasm, mitochondria and other cell organelle.Neurons are of different types:
Unipolar neuronBipolar neuronMultipolar neuronNeurons are the chemical messenger. They contain nucleus which contain genetic material. Mitochondria produces energy. Neurons contain specialized structures and chemicals. They contain some specialized structures (synapse) and chemicals called neurotransmitter.
Therefore, The nucleus is present in the cell body.
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What would happen if the enzyme used for cellular respiration or photosynthesis to break after a few cycle? Why?
Answer:
Please mark as brainliest!!!
Explanation:
Cells face a related problem when they break down fuels, such as glucose, to produce ATP. If the cell’s supply of ATP is low, it would do well to break down glucose as quickly as possible, replenishing the ATP it needs to “keep the lights on.” If the supply of ATP is high, on the other hand, it might not be such a good idea to oxidize glucose at top speed. ATP is an unstable molecule, and if it sits around in the cell too long, it’s likely to spontaneously hydrolyze back to ADP. This is like the case of the melted ice cream sandwich: the cell has spent glucose to make ATP, and that ATP ends up going to waste.
It’s important for a cell to carefully match the activity of its fuel breakdown (pathways to its energy needs at a given moment. Here, we'll see how cells turn cellular respiration pathways “up” or “down” in response to ATP levels and other metabolic signals.
Please answer this.. please
Answer:
10.8 amu
Explanation:
11 * 0.80 = 8.8 (11 represents ion, 0.80 represents %)
10 * 0.20 = 2 (10 represents ion, 0.20 represents %)
8.8 + 2 = 10.8 amu
In this phase the chromosones begein to un coil and form chromatin?
a. Telophase
b. Metaphase
c. Prophase
d. Anaphase
Answer:telophase
Explanation:
Telopahse is the last phase of mitosis. The chromosomes uncoil then a membrane forms around them and the one cell splits into two cells.
5. What bone does not join with any other bone and is part of the axial skeleton?
Answer:
Hyoid bone
Explanation:
Although it is not found in the skull, the hyoid bone is considered a component of the axial skeleton. The hyoid bone lies below the mandible in the front of the neck.
Answer:
The hyoid Bone
Explanation:
Although it is not found in the skull, the hyoid bone is considered a component of the axial skeleton.
The movement of ocean currents around the globe? Check all that apply. Strong winds force warm water to sink to the ocean floor. The Coriolis effect causes warm and cold water to mix. Cool dense water sinks to the ocean floor. Warm water replaces cool surface water. Wind blowing parallel to the shore causes upwelling of cool water.
Answer:
Explanation:
3,4,5
Answer:
3,4 and five
Explanation: