why is the cell membrane sometimes referred to as a fluid mosaic? what part of the cell membrane acts like a fluid? and what makes it a mosaic?
The cell's membrane is a crucial component. It is frequently referred to as fluid mosaic because of its shape and behavior. The phospholipid bilayer, is considered fluid and is considered to be the mosaic because of its variety of components.
The phospholipid bilayer, which is composed of lipids and phosphate, allows for selective permeation of the cell membrane. Proteins on the cell membrane perform a number of jobs in the cell, including transport, signaling, and support. Additionally, carbohydrates are affixed to the membrane's surface, where they aid in cell identification and communication.
As a result, the term "fluid mosaic structure" is also used to describe the cell membrane.
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Which idea best describes why the volume of water in Earth's oceans changes?
A)Inside of volcanoes
B)Inside the atmosphere
C)Bonded to meteorites that hit the Earth
D)Bonded to minerals in Earth's mantle
Answer:
B)Inside the atmosphere
By the end of the 1700s, a __________ character was taking shape in Texas. *
Hunting
Native
Spanish-like
Tejano
any pair of chromosomes other than the sex chromosomes
Dewayne, a pianist, wants to compare sound quality. Which scenario describes how he could do this?
a.) He plays two different notes on two different pianos at a different volume.
b.)He plays two different notes on the same piano at the same volume.
c.)He plays the same note on the same piano at a different volume.
d.)He plays the same note on two different pianos at the same volume.
Barnacles live on whales. Whales carry the barnacles around, which helps the barnacles feed. The whales are unaffected. This is an example of _____. predation mutualism parasitism commensalism
Answer: The correct answer for the blank is-
commensalism.
Commensalism is a long term biological interaction between two organisms belonging to different species where one organism gets benefit and the other organism neither gets benefit nor it is harmed.
In this question, Barnacles living on whales get benefit as they get their food while moving around on Whales. In this interaction, the whales are unaffected.
Thus, this is an example of commensalism.
There are twenty different types of _____________ which join together in differing sequences and numbers to form different proteins. A) fatty acids B) amino acids C) nucleic acids D) monosaccharides
B. Amino acids
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these parts of a cell present in plant cells but not in animal cells are called the blank and blank
The correct answer is ""The these parts of a cell present in plant cells but not in animal cells are called the cell wall and chloroplasts.""
Plant cells and animal cells share many common features, such as a nucleus, mitochondria, and an endoplasmic reticulum. However, there are two major structures found in plant cells that are typically not present in animal cells: the cell wall and chloroplasts.
1. Cell Wall: The cell wall is a rigid layer that surrounds the cell membrane of plant cells. It is primarily composed of cellulose, hemicellulose, and pectin. The cell wall provides structural support, protection, and a filtering mechanism for the cell. It helps maintain the shape of the cell and plant, and it also plays a crucial role in the transport of substances into and out of the cell.
2. Chloroplasts: Chloroplasts are organelles that contain chlorophyll, the green pigment that is essential for photosynthesis. Photosynthesis is the process by which plants convert light energy into chemical energy, producing glucose and oxygen from carbon dioxide and water. Chloroplasts are crucial for the energy needs of the plant and are not found in animal cells, as animals do not perform photosynthesis.
These structures are unique to plant cells and are essential for the survival and function of plants. The cell wall provides strength and rigidity, while chloroplasts enable plants to harness energy from sunlight, which is fundamental to the ecosystem as it forms the base of the food chain.
What do an ogre, an onion and the Earth have in common? They have layers! How many layers does the Earth have?
Answer:
Crust, Mantle, Inner Core, and Outer Core
organelles that modify PACKAGES
and transports materials out of a cell
Describe how producers, consumers, and decomposers are linked in a food chain.
what makes a molecule a saturated fat?
A molecule is a saturated fat when it consists of carbon chains having only single bonds between carbons, making it fully 'saturated' with hydrogen atoms. These fats have straight chains, can pack tightly together, and are solids at room temperature.
Explanation:A molecule is classified as a saturated fat when it is a type of simple lipid molecule with a carbon chain bonded to the maximum number of hydrogen atoms possible. This means that each carbon atom in the chain is linked to adjacent carbons by single bonds only, without any carbon-to-carbon double bonds (C=C). Saturated fatty acids comprise these simple lipid molecules and contribute to the molecule's straight chain structure, which allows them to pack closely together. Consequently, saturated fats tend to have high melting points and are typically solids at room temperature.
which two macromolecules offer energy storage to the cell
1) Living organisms all have DNA and RNA which are both_____
Carbohydrates
Lipids
Proteins
Nucleic acids
__________________________
2)
Carbohydrates are made up of carbon, oxygen, and
gold
hydrogen
copper
potassium
____________________________
3)
Which of these elements is essential to making up all organic molescules?
hydrogen
oxygen
carbon
nitrogen
_______________________________
4)
What is the basis of an orgnanic molecule?
The basic structure molescule?
The basic structure is the iron atom.
The basic structure is the potassium atom.
The basic struture is the carbon atom.
__________________________________
5)
The four fundamental types of organic molecules are nucleic acids, carbohydrates, lipids, and_______.
Proteins.
nitrates.
sulfates.
Phosphates.
Answer:
d, b, c, d, a
Explanation:
i got a 100 on the test and i'm positive these are the correct answers u can trust me. some of my questions are a little different but you can fill in the blanks.
Living organisms have DNA and RNA, both of which are nucleic acids. Carbohydrates are made up of carbon, oxygen, and hydrogen. Carbon is the basis of all organic molecules. The four fundamental types of organic molecules are nucleic acids, carbohydrates, lipids, and proteins.
Explanation:1) Living organisms all have DNA and RNA which are both nucleic acids. Nucleic acids are biological macromolecules that store genetic information and enable protein production.
2) Carbohydrates are made up of carbon, oxygen, and hydrogen. They are key sources of energy for living organisms.
3) Carbon is the element that is essential to making up all organic molecules. Organic molecules, by definition, contain carbon atoms.
4) The basis of an organic molecule is the carbon atom. Carbon atoms can form long chains, complex structures and numerous compounds, making them the basic building blocks of life on Earth.
5) The four fundamental types of organic molecules are nucleic acids, carbohydrates, lipids, and proteins. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells, and organisms, and transporting molecules from one location to another.
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Which factor can affect the rate of photosynthesis by denaturing enzymes in the plant?
Answer:
At certain pH levels, the enzymes in the plant can denature. If this occurs, the plant will no longer be able to carry out chemical reactions in the cell, including photosynthesis.
In a population of doves in a forest a small group of long tailed doves migrated to another forest. Over successive generations the population in the new habitat shows more of the long tailed doves than the short tailed ones. Which factor could be responsible for this micro evolution
How will the increase in the bird population most likely affect the bug population
how do structures in organisms compare with structures of nonliving things such as construction cranes buildings, ships, airplanes, or bridges?
Organisms exhibit homologous structures due to shared evolutionary origins, while analogous structures serve similar functions in unrelated species. Nonliving things are engineered to fulfill specific functions, mirroring the principle of 'form follows function'. Unlike engineered structures, organisms can self-construct and repair, highlighting a key difference between living and nonliving structures.
When comparing the structures of organisms with the structures of nonliving things, such as construction cranes, buildings, ships, airplanes, or bridges, we can observe that both exhibit organization, complexity, and purpose-driven design. In living organisms, structures such as bones and limbs are often homologous structures, meaning they share a common evolutionary origin and can be identified across different species because they exhibit similarities in both form and genetics. For instance, the forelimbs of mammals like humans, cats, and whales all share a basic bone structure, despite their divergent forms and functions.
On the other hand, analogous structures are those which are similar in unrelated organisms due to convergent evolution, serving comparable functions without a common evolutionary origin. An example is the wings of bats and birds; both perform the function of flight but have evolved independently with different bone patterns. In contrast, human-engineered structures are the result of deliberate design processes to fulfill specific functions, such as lifting weights in the case of construction cranes or supporting heavy loads for bridges, showing parallels to the principle of 'form follows function' in biology.
Comparative anatomy has revealed striking similarities between different organisms, reflecting both the diversity and unity of life forms. For instance, a dragonfly's wings and a dolphin's bones both express adaptations for movement, analogous to the structural design of bridges or airplane wings which must support dynamic stresses. However, unlike human-designed structures, living organisms have the unique ability to construct and repair themselves through biological processes, showcasing the profound distinction between biological life and inanimate constructs.
How is environmental Science different from ecology
Plant leaves _____.
A. are made mostly of dermal tissue
B. contain many parenchyma cells
C. are covered with a waxy cortex
D. absorb water and nutrients
Answer: Option C
Explanation:
The plants are known as the producers that make food by the help of the process known as photosynthesis.
The process of photosynthesis takes place in the leaves and then the food is transported to various parts of the plant body.
Epidermal tissues in the leaves are covered with a waxy cuticle or cortex.It helps in preventing water loss from the leaves.
The guards cells in the leaves are responsible for the opening and closing of stomata which in turn controls the water loss from the leaves.
Which of these is an example of chemical change breaking glass melting ice on windshield burning gasoline denying a bumper
Answer: Option (c) is the correct answer.
Explanation:
It is known that chemical changes are the changes which tend to show difference in chemical composition of a substance.
For example, toxicity, reactivity, combustion etc are all chemical properties.
When gasoline is burning then a chemical change takes place as combustion is taking place.
A chemical change will always lead to the formation of a new compound and this change is irreversible in nature by any physical means.
On the other hand, a change which is unable to bring any difference in chemical composition of a substance is known as a physical change.
For example, change in shape, size, mass, volume etc are all physical properties.
Breaking glass, melting ice on windshield and denying a bumper are all physical changes.
Thus, we can conclude that out of the given options burning gasoline is an example of chemical change.
Answer:
(c) burning gasoline
Explanation:
i took the test
What enzyme forms covalent bonds between restriction fragments?
DNA ligase is the enzyme that forms covalent bonds between restriction fragments. It catalyzes the formation of a phosphodiester bond, helping to join DNA strands of restriction fragments. This process, called ligation, is used in DNA manipulation such as DNA cloning and DNA repair.
Explanation:The enzyme that forms covalent bonds between restriction fragments is called DNA ligase. This enzyme is often used in methods of DNA manipulation such as DNA cloning and DNA repair. In the process known as ligation, DNA ligase catalyzes the formation of a phosphodiester bond between the 3' hydroxyl of one nucleotide and the 5' phosphate of another. This action helps to join together the restriction fragments, thereby attaching the strands of DNA to each other to form a complete, circular molecule. For example, in the field of genetic engineering, DNA ligase is used to combine pieces of DNA from different sources into a composite DNA molecule.
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Which statement does not describe a scientific theory A) Can never be proven B) supported by facts C) eventually becomes a fact D) generally accepted explanation
The statement C. "eventually becomes a fact" does not describe a scientific theory. Scientific theories remain theories despite extensive evidence and are open to revision; they don't become 'facts'.
The statement that does not accurately describe a scientific theory is "eventually becomes a fact." It's important to note that a scientific theory is a well-substantiated explanation of aspects of the natural world that has been consistently supported by a large body of evidence and facts obtained from multiple observations and experiments. A scientific theory is generally accepted among scientists due to its robust support, not because it has morphed into a fact over time.
Additionally, scientific theories are designed to be testable and are subjected to rigorous testing and refinement. While a theory may be widely accepted and highly reliable due to extensive evidence, it remains open to scrutiny and revision should new evidence emerge.
what happens when thermal energy is absorbed
Record your observations of how the agar cubes look before you add vinegar and then after you add vinegar and stir. How did the appearance of the cubes change over time?
Answer:
Both the size and color of vinegar cubes changed.
Explanation:
The agar cubes before the addition of vinegar looked pink in color due to the addition of coloring agent for testing color change on addition of vinegar.
When vinegar is added the color of agar changes from pink to orange as vinegar is acidic in nature.
Also as the vinegar diffused into the cubes it became large after stirring. Thus, both the size and color of vinegar cubes changed.
What do ribosomes rough er and the golgi apparatus have in common
Ribosomes, Rough endoplasmic reticulum (RER), and golgi apparatus- all the three organelles participate in the packaging of proteins. Proteins synthsized in ER, are packed in the golgi apparatus.
What is Protein packaging?Golgi apparatus is the main organelle which is responsible for the packaging and transportation of the proteins, and lipids. The nucleolus present in the nucleus is responsible for the synthesis of ribosomal RNA (rRNA) and proteins. Ribosomes are responsible for the synthesis of protein.
Proteins generated by the ribosomes in the endoplasmic reticulum are packed in the Golgi apparatus, where lipids are wrapped around them in a membrane which is then exported out of the cells. Molecules which enter the Golgi apparatus are charged, stored, and then released into the cytoplasm in the form of secretory vesicles to the final destination.
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Which of these is true of algae, bacteria, and flowering plants? A They are composed of cells. B They all have chlorophyll. C They all feed off other organisms. D They are inorganic.
The option which is true about algae, bacteria, and flowering plants is that they all are composed of cells. Thus, the correct option for this question is A.
What is Bacteria?Bacteria may be defined as single-celled, prokaryotic, and microscopic organisms that lack a well-defined nucleus and other membrane-bound cell organelles. They are most potent to cause numerous diseases in plants and animals.
Except for cyanobacteria, none of the other bacteria have chlorophyll. Some photosynthetic algae have only chlorophyll, while almost all flowering plants possess a chlorophyll pigment.
According to the three premises of the cell theory, all living organisms whether plants or animals are made up of cells because a cell is the only one that is the structural and functional unit of life for each living entity.
Therefore, all algae, bacteria, and flowering plants are composed of cells. Thus, the correct option for this question is A.
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write a list of at least five scientific methods
Answer:
A mathematical and experimental technique used in the field of science more specifically for constructing and testing a scientific hypothesis is known as a scientific method. The list of five scientific methods are as follows:
a) Asking a question
b) Developing a hypothesis
c) Examining the hypothesis by performing an experiment
d) Assessment of the data and creating a conclusion
e) Interact and associate the findings or the outcomes with the others.
Which of the following accurately describes fermentation? A. Fermentation generates more ATP than cellular respiration. B. Fermentation makes NAD+ needed to keep glycolysis going. C. Fermentation can only occur in the presence of oxygen. D. All types of fermentation produce carbon dioxide.
Fermentation makes NAD+ needed to keep glycolysis going.
What is Fermentation?
Sugars are transformed into compounds that are helpful to humans through fermentation, a natural process.
The earliest known evidence of fermentation dates back to 10,000 B.C.E., when the first human civilization first appeared in what is now known as the Fertile Crescent.
Even without the scientific understanding of today, people in the past could nonetheless evaluate the world and create technology. Famous scientist Carl Sagan famously remarked that every child is a natural-born scientist.
Therefore, Fermentation makes NAD+ needed to keep glycolysis going.
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Fermentation makes NAD+ needed to maintain glycolysis, an anaerobic process that allows cells to continue producing ATP without oxygen. It is less efficient than cellular respiration and has two main types: alcoholic and lactic acid fermentation. Not all fermentation produces carbon dioxide.
The correct answer to the question is B. Fermentation makes NAD+ needed to keep glycolysis going. Fermentation is a metabolic process that occurs when cells must produce energy (ATP) under anaerobic conditions, meaning in the absence of oxygen. During glycolysis, glucose is broken down to produce ATP and NADH. However, for glycolysis to continue, NADH must be recycled back to NAD+. This is where fermentation comes into play. It helps to regenerate NAD+ from NADH, enabling glycolysis to produce ATP.
There are two main types of fermentation: alcoholic fermentation and lactic acid fermentation. Alcoholic fermentation is common in yeasts and some types of bacteria and results in the production of ethanol and carbon dioxide. Lactic acid fermentation, on the other hand, occurs in muscle cells when oxygen is scarce, producing lactate. Both processes allow for the continuation of ATP production through glycolysis by maintaining the necessary levels of NAD+.
The assertion that fermentation generates more ATP than cellular respiration (A) is incorrect; in fact, fermentation is much less efficient in ATP production. Claim C, which suggests fermentation can only occur in the presence of oxygen, is also incorrect as fermentation is an anaerobic process. Lastly, not all types of fermentation produce carbon dioxide (D), as is the case with lactic acid fermentation.
The atmosphere is one part of the environment that does not directly affect us