Answers
Related Questions
The cell membrane is selectively permeable. Which type of membrane protein best illustrates this concept?
A. channel
B. marker
C. receptor
D. hormone
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Answer:
marker.
Explanation:
selectively permeable means some materials are allowed in and out of the cell.
Why do welders have to wear a protective shield to cover their eyes?
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Answer:
Protects from radiation, flying particles, debris, sparks, intense light, irritation and chemical burns
Barrera que delimita a la celula y que contiene sus organelos y los productos generados dentro de la misma , a traves de ella entran nutrientes y expulsan desechos
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Answer:
Membrana celular
Explanation:
La membrana plasmática o membrana celular, presente en todas la céluas, la protege y encierra a distintas organelas, que al estar aisladas deñexterior, funcionan como una unidad difereciada. Aun asi, cada célula mantiene comunicación con otras células a partir de esta membrana. Esta estructura, a parte, permite el paso de sustancias desde y hacia el iterior celular. Moleculas necesarias para el adecuado funcionamiento de la celula ingresan a la misma, mientras que otras destinadas a exportación, desechos, mentenimiento del equilibrio, etc, salen al espacio intercelular. Las membranas biológicas estan formadas por una bicapa lipídica. los lípidos se posicionan de manera tal que las cabezas hidrofilicas apuntan hacia el exterio e interior celular, mientras que las colas hidrofóbicas se disponen hacia el interior de la bicapa. Las membranas celulares son fluidas, es decir que las moleculas que la componen tienen la capacidad de moverse.
Dentro de la célula, e incluidas en el citoplasma, hay varias organelas que también se encuentran delimitadas por membrana, tales como nucleo, reticulo endoplasmático, aparato de golgi, mitocondrias, cloroplastos, vacuolas y vesiculas. El contenido de estas organelas se encuentra aislado del citoplasma gracias a la contención de la membra.
biology question on enzymes
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Answer:
D
Explanation:
because it have a shape like that and the optimum temperature is at 37 ish which Is right the other are not right.
Answer:
Option D
Explanation:
Because the max reaction rate of a majority of enzymes in homeotherms is about 40 degrees C, they will start to denature at higher temperatures. Of course enzyme activity will vary compared to other organisms, i think with these options that option D is your best bet.
What happens during photosynthesis? *
A) ATP is created in the light reactions and used in the Calvin cycle
B) ATP is created in the Calvin cycle and used in the light reactions
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Answer:
A) Apt is created in the light reactions and is used in the Calvin cycle
Today, forensic psychologists have reason to believe that many highly violent crimes are committed by criminals who in fact do NOT have full mental capacity.
True
False
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Answer:
so according to me I think it should be a true
Help with these 3 please
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Match each feature created by erosion to the correct description.
(Here's the answer for anyone that need it.)
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Answer: Thank you so much i needed that.
Explanation:
What process is the base of the food web?
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Answer:
Autotrophs are the foundation of food chains and food webs, and the energy they gather from light or chemicals is what keeps the rest of the community alive. We can refer to autotrophs as producers when discussing their involvement in food chains.
Explanation:
Hope this helps!
Please mark me as Brainlinieast.
Given the following DNA sequences for cytochrome c, answer the question.
In one paragraph, using your own words, describe how you would determine which organisms are most closely related using the chart.
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Answer:
Dolphin and kangaroo.
Explanation:
Dolphin and kangaroo are the two organisms that are closely related to each other because both have very similar DNA sequences from which the body of organism formed. There are one or two values are different between both Dolphin and kangaroo so that's why both Dolphin and kangaroo are considered as closely related organisms to each other due to similar DNA sequence.
can someone please answer this lol
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Answer:
C: Fewer nesting sites
Explanation:
A steady increase in global temperature has been recorded
between 1900 and today. Before concluding that this rise in
temperature is the result of the increased burning of fossil
fuels since that same time, which of the following questions
would have to be answered?
A What is the CO2 content in one metric ton of fossil
fuels?
B Which gases are released when burning fossil fuels?
C What, if any, temperature rise was occurring prior to
1900?
D How have humans adapted to temperature change?
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Answer:
C
Explanation:
C What, if any, temperature rise was occurring prior to 1900?
The amount of guanine nearly equals the amount of cytosine, and the amount of adenine nearly equals the amount of thymine within the DNA of a species.
What is this information known as
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Answer: the base pairs of DNA
Apart from muscles contracting, what other types of activities has your body done in the past 24 hours that require energy? Complete the list below.
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Answer:
Digestion, excretion and transportation of substances.
Explanation:
Chemical reactions such as breakdown of food, cleaning of blood and absorption of nutrients and digestion are the activities that our body done with the use of energy. Digestion of food needs energy for the breakdown of food with the help of several enzymes. Transportation of waste materials and other substances also needs energy. Our cells absorb nutrients with the help of energy molecules through active transport.
I NEED THE ANSWER NOW PLEASE HELP
The tiny fruit fly is a superstar of genetics research. Thousands of experiments have explored how flies inherit traits. Wing shape, body color, eye color, and head shape are a few traits under investigation. Fruit flies make good study subjects because they are inexpensive, take little space, and breed quickly. In addition, humans and fruit flies share 75% of their disease genes. By studying fruit-fly genetics, we can learn about human illness.
Short-winged fruit flies studied in the lab cannot fly because they have an allele that causes them to grow tiny wings (w). Normal fruit flies, known as “wild-types”, have fully functional wings (W). The wild-type wing is the dominant allele.
If you cross one short-winged fly (ww) with a wild-type fly (WW), what is the probability of getting a short-winged offspring in the F1 generation?
Explain your reasoning.
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Answer:
The probability of getting a short-winged offspring in the F1 generation is 0. .Explanation: When you cross a WW parent with a ww parent, all the offspring will get one W and one w allele from their parents. They will have the genotype Ww. To have short-winged offspring, the genotype must be ww. The dominant wild-type allele (W) will make all offspring that will have functional wings
The chart lists coordinates that describe the locations of
four cities.
City
Location
Kinshasa, Democratic Republic of the Congo 4° S/15° E
Addis Ababa, Ethiopia
9°N/39°E
Lagos, Nigeria
6°N/3° E
Oran, Algeria
35° N/0°W
Which city listed in the chart is farthest south?
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Answer:
c.
Explanation:
i took the test
what two gases are being attributed with global climate change?
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Answer:
Indeed, carbon dioxide, a byproduct of fossil fuel combustion, is the principal greenhouse gas contributing to global warming. However, other greenhouse gases including methane, nitrous oxide, and a number of industrial-process gases also are important contributors to climate change.
In sickle cell anemia which of these changes?
Group of answer choices
The shape of white blood cells
The shape of red blood cells
The shape of blood vessels
The shape of skin cells
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Answer:
the shape of white blood cells
Answer:
I think its: The Shape of blood vessels
which of the following is an object used in relative dating.
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relative dating is the process of determining if one rock or geologic event is older or younger than another, without knowing their specific ages
Answer:
Option C Index Fossil
Explanation:
Relative dating is in order of rocks layers. The layers are no longer horizontal, but geologists are able to determine their order.
Which action has the most harmful impact on the environment
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Answer:
pick anyone overpopulation, pollution, burning fossil fuels, and deforestation
Answer:
buying a new plastic water bottle and throwing it away
Explanation:
just took it
Where would a star the same size of the sun have to be located, in order to appear brighter than the sun?
- A
- B
- C
- S
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Which of the following statements is not an example of evolution that has resulted from human activity? Group of answer choices Some insect species are now resistant to pesticides. Many strains of bacteria are now resistant to some commonly used antibiotics. Like certain other crops, domesticated strawberries are larger than wild strawberries. Because of hunting, organisms such as bears and wolves are fewer in number.
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Answer:
The correct answer is - Because of hunting, organisms such as bears and wolves are fewer in number.
Explanation:
Evolution is the change in the characteristics or traits of the species that are developed over several generations by the process called natural selection. Natural selection is the process of transferring the genes or traits that help in the survival of organisms.
Among the given statements all the are the example of the evolution that is resulted from human activity except the extinction or fewer the bears and wolves due to hunting. Other examples are showing evolution as they developed characteristics over generations.
In which process do homologous chromosomes pair up?
A. Mitosis
B. Meiosis
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Answer:
the answer is meiosis
Explanation:
in miosis it happens in prophase I.
Answer:
B. Meiosis
Explanation:
Homologous chromosomes pair up in meiosis.
Once the body has begun shivering, what happens to make it stop shivering?
A. When body temperature returns to normal, the respiratory system sends a message to the skeletal system to stop shivering.
B. When body temperature returns to normal, the nervous system sends a message to the muscular system to stop shivering.
C. When body temperature is below normal, the nervous system sends a message to the skeletal system to stop shivering.
D. When body temperature is below normal, the respiratory system sends a message to the muscular system to stop shivering.
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Explanation:
The answer is A.
When the body temperature returns to normal,the respiratory system sends a message to the skeletal system to stop shivering.
A scientist finds a fossil that she thinks might make a good index fossil.
Which characteristic does this fossil most likely have?
It is the remains of an organism still found alive today.
O It is the remains of an organism that is found in abundance nearby.
O It is the only fossil for this type of organism that has ever been found.
O It is the remains of an organism that lived in a narrow geographic area.
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Answer:
it is the remains of an organism that is found in the abundance nearby
Answer:
B
Explanation:
Which of the following best describes the difference between an adaptation and adapting?
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Answer:
which following??!
Explanation:
thanks for points :)
What differences exist in attitude between rangers of past times and those of the current day?
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where would you expect to find crystals that formed from a solution ?
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according to the Miller-Urey Experiment, what materials existed in Earth's early atmosphere
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Answer:
The experiment used water (H2O), methane (CH4), ammonia (NH3), and hydrogen (H2).
Explanation:
What do you think selectively permeable means?
A. The membrane lets nothing in or out.
B. The membrane lets certain substances move across it freely, while others must move through a “gate”.
C. The membrane lets everything in and out.
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Answer:
B. The membrane lets certain substances move across it freely, while others must move through a “gate”.
Explanation:
Selective permeability is a property of cellular membranes that only allows certain molecules to enter or exit the cell. This is important for the cell to maintain its internal order irrespective of the changes to the environment. For example, water, ions, glucose and carbon dioxide may need to be imported or exported from the cell depending on its metabolic activity. Similarly, signaling molecules may need to enter the cell and proteins may need to be released into the extracellular matrix. The presence of a selectively permeable membrane allows the cell to exercise control over the quantum, timing and rate of movement of these molecules.
B. The membrane lets certain substances move across it freely, while others must move through a “gate”.