Elements are pure substances comprises atoms.
Explanation:An element is a substance that can't be separated into some other substance. Each element is comprised of its own kind of atom. This is the reason the chemical elements are for the most part mere different from one another.
The periodic table records all the discovered elements, gathering those with the same properties. The elements includes metals, non-metals, and metalloids. Most elements are metals, which conduct electricity and are shiny in nature. Metals incorporate iron, gold, and aluminum which are solid at room temperature.
valence electrons are important because
A) They form chemical bonds with other atoms
B) They tell which period the element is in
C) They take isotopes
D) They identify the element
Answer:
A) They form chemical bonds with other atoms
Explanation:
In chemistry, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
This picture showes
A. Weathering
B.erosion
C. Deposition
D.all of the above
Answer: No Picture Included
Explanation:
20.
What makes up the backbone of a DNA molecule?
ribose and deoxyribose
nucleic acids
RNA molecules
sugars and phosphates
Answer:
Sugars and phosphates
Explanation:
DNA is deoxyribonucleic acid.
The backbone is based on a repeated pattern of a sugar group (deoxyribose) and a phosphate group.
The image below shows one straightened-out strand of DNA with a backbone of alternating sugars and phosphates.
A is wrong. There is no ribose in DNA.
B is wrong. The nucleic acids A, C, G, and T join one strand of DNA to the other.
C is wrong. There is no RNA in DNA.
Answer:
D. Sugars and phosphates
Explanation:
DNA or deoxyribonucleic acid which is a self-replicating material present in nearly all organisms and the constituent of chromosomes, It is also the carrier of the basic instructions of life!
We have a total of 23 chromosomes in our cells!
hope this helps
sincerely,Ur cat friend kittylike11Which of the following is NOT a fate of a protein that is produced by the rough ER?
It functions inside of an organelle that is a member of the endomembrane system.
It functions in the cytoskeleton as a tubulin component of microtubules.
Is is secreted from the cell similar to how the protein called insulin is secreted from pancreatic cells.
It functions as a glycoprotein in the membranes of the golgi apparatus.
Answer:Is is secreted from the cell similar to how the protein called insulin is secreted from pancreatic cells.
Explanation:
Answer:
The second statement is incorrect.
Explanation:
The proteins generated in the rough endoplasmic reticulum can be sorted to the cell membrane, Golgi apparatus, exterior to the cell, and lysosome.
As a component of microtubules tubulin is found in cytoplasm and these proteins of cytoplasm originate due to the translation process undergone by the cytoplasmic ribosomes, not by the ribosomes present on the rough endoplasmic reticulum. Thus, these proteins are not a component of endomembrane system.
Explain how oxygen is cycled between the plant and woman shown in the picture.name the specific processes involved
---------------------------------
The woman inhales oxygen produced by the plant in the process of PHOTOSYNTHESIS,
and she use it inside her body to release energy from the food molecules by the process of RESPIRATION also as a result of respiration Carbon dioxide gas is produced, which she exhales.
That carbon dioxide is absorbed from air by the plant and use it to prepare food from it in the presence of sunlight by the process of PHOTOSYNTHESIS in which oxygen is also produced as byproduct which is then released to air and is then inhaled by the woman again to repeat the cycle.
_____________________
The specific process involved is called photosynthesis.
The female inhales oxygen produced by means of the plant inside the procedure of photosynthesis and she or he uses it inside her frame to launch strength from the meals molecules through the process of respiratory additionally due to respiration Carbon dioxide gasoline is produced, which she exhales.
That carbon dioxide is absorbed from the air through the plant and used to put together meals from it in the presence of daylight by way of the technique of photosynthesis wherein oxygen is also produced as a byproduct which is then released into the air and is then inhaled by way of the lady again to repeat the cycle.
What is photosynthesis?Photosynthesis is the method by way of which flowers makes use of daylight, water, and carbon dioxide to create oxygen and electricity in the form of sugar. Photosynthesis is the manner via which flora uses daylight, water, and carbon dioxide to create oxygen and electricity in the form of sugar.
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What happens when nutrient levels become too concentrated in rivers, lakes, and oceans?
When nutrient levels get too high, water quality degrades and oxygen levels are depleted through a process known as
Answer:
Eutrophication is what happens when nutrient levels become too concentrated in rivers, lakes, and oceans. Eutrophication is when the levels of nutrients and minerals in a body of water become too concentrated. It is usually induced by the release of nitrate or phosphate-containing substances into a water body.
Explanation:
Which best describes the law of independent assortment?
A. The factors for each trait are separated independently when sex
cells form.
B. Traits can only be controlled by a single gene.
C. It is impossible to cross-pollinate plants.
D. The traits of an offspring are independent from the parents.
SUBMIT
Answer: A. The factors for each trait are separated independently when sex
cells form.
Explanation:
i got it right on the test
Final answer:
The law of independent assortment, described by A, asserts that genes sort into gametes independently, forming diverse combinations and contributing to genetic variation in offspring.
Explanation:
The correct answer to which best describes the law of independent assortment is A. The factors for each trait are separated independently when sex cells form. The law of independent assortment is an essential principle of genetics first described by Gregor Mendel through his work on pea plants.
This law explains how different genes independently separate from one another when reproductive cells develop. In a dihybrid cross, for instance, the combination of alleles for seed color and seed texture in pea plants assort independently during the formation of gametes. Each allele pairs for different characteristics sort into gametes randomly, leading to a variety of genetic combinations that contribute to genetic diversity in offspring.
How do population cycles impact trophic levels?
Answer: Top predators, or tertiary consumers can also be keystone species. ... Without their predator, the populations of these herbivores grows out of control as they eat all their food source, the producers. Like changes in other trophic levels, without the producers, the entire ecosystem can collapse.
Explanation: Food webs illustrate energy flow from primary producers to primary consumers (herbivores), and from primary consumers to secondary consumers (carnivores). ... Under top-down control, the abundance or biomass of lower trophic levels depends on effects from consumers at higher trophic levels. So yeah!
Answer:
If one’s trophic level increases or decreases too much, it can impact the number of producers. This in turn depletes the energy in the food web, which can disrupt homeostasis.
Explanation:
coursehero
Felicia's teacher gives her the following list of types of organisms:
1. Ferns
2. Mushrooms
3. Algae
4. Insects
Protists, like Cryptomonads and Diatoms, are often unicellular and photosynthetic. Fungi, like Yeast and Agaricus bisporus, absorb nutrients from other organisms, distinguishing them from plants. Algae include various photosynthetic organisms important in aquatic ecosystems.
Explanation:The subject at hand involves understanding the classifications and characteristics of various organisms within the fields of biology and ecology. When asked to name two types of protists and two types of fungi, one could mention, as examples, Cryptomonads or Diatoms for protists, and Yeast or the common mushroom, Agaricus bisporus, for fungi. Protists are often unicellular and can be photosynthetic like Cryptomonads and Diatoms, while fungi such as Yeast and Agaricus bisporus are not capable of photosynthesis and instead absorb nutrients from their environment.
It's important to note that while plants undergo photosynthesis, fungi do not; they absorb nutrients from other organisms. This distinct mode of nutrition separates fungi from plants and places them in a unique kingdom of their own. Moreover, organisms like algae, which encompass a wide range of photosynthetic organisms such as seaweed or unicellular algae like Acetabularia, are key components of aquatic ecosystems.
why are formulas used to describe substances
Answer:
Chemical formulas are used to describe the types of atoms and their numbers in an element or compound. ... When more than one atom of a specific element is found in a molecule, a subscript is used to indicate this in the chemical formula.
Look at the chemical reaction below.
Answer:
Mg and HCl are both reactants.
MgCl2 and H2 are both products.
Explanation:
In general, things on the left side of the chemical reaction are reactants (things that react) and things on the right side are products (things that are produced).
This is why the answer is what it is.
Why is wafting chemicals important?
Answer:
It is very important to not inhale chemicals because when strong acids and bases get into your lungs, they mix with the water in your lungs and can cause burns. Your lungs are sensitive to many chemicals because the alveoli sacs are on one cell layer thick.
Theories are backed up with lots of data, evidence, and observations from many
people over time.
True
False
Answer: True
Explanation:
A theory is the detailed explanation for the cause of processes and events that occur naturally.
These are supported by the evidences obtained from experimental trials. The information of the theory can be changed by new evidences obtain by people by applying the principle and methodology of the theory.
Why do organs need a constant supply of blood?
a. To continually clean the organs, blood must constantly pass through them.
b. To continually help the cells within the organs change into new types of cells
c. To continually produce energy, your organs need oxygen and the oxygen is
carried in your red blood cells.
d. None of the above
please only answer if you know the actually answer
Answer:
to continually produce energy,your organs need oxygen and the oxygen is carried in your red blood cells.
To continually produce energy, your organs need oxygen, and the oxygen is carried in your red blood cells, option C is correct.
The constant supply of blood is vital for maintaining the proper functioning of organs due to the oxygen they require to generate energy through cellular respiration. Hemoglobin in red blood cells binds to oxygen in the lungs, and this oxygen-rich blood is pumped by the heart to organs through an intricate network of blood vessels.
Cells extract oxygen from the blood, facilitating the production of adenosine triphosphate (ATP), the energy currency of cells. Additionally, blood carries nutrients and removes waste products, contributing to organ health. Thus, the continual circulation of blood ensures the delivery of oxygen and nutrients necessary for energy production and overall cellular activities in organs, option C is correct.
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An enzyme is a protein that____
An enzyme is a protein that accelerates a specific chemical reaction within a cell by reducing the activation energy. Each enzyme is specific to certain substrates and doesn't alter the free energy of the reactants or products, but merely makes the bond breaking and forming processes happen more readily.
Explanation:An enzyme is a protein that substantially speeds up the rate of a specific chemical reaction within the cell by lowering the activation energy. Each enzyme is highly specific, only acting on certain substrates to either break them down (catabolic enzymes), build more complex molecules (anabolic enzymes), or affect the rate of reaction (catalytic enzymes). These enzymes, which are composed of amino acid chains, bind to these substrates and hold them in a certain way to make the process of breaking and forming bonds happen more readily. However, it is crucial to note that enzymes do not alter the free energy of the reactants or products, nor do they change whether a reaction is exergonic (spontaneous) or endergonic.
An example of an enzyme is salivary amylase that is involved in the breakdown of amylose, which is an element of starch.
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Which of the following is an organic molecule
A. Iron oxide
B.Oxygen gas
C.Water
D.Sucrose
Answer:
c water (h2o)
Explanation:
Match the different levels of protein organization with their definition.
Levels of organization:
1. Primary structure
2. Secondary structure
3. Tertiary structure
4. Quaternary structure
Definitions:
A. Linear sequence of amino acids in the polypeptide chain
B. Three-dimensional structure of a polypeptide
C. Highly regular local sub-structures such as α-helix and β-pleated sheet structures
D. Three-dimensional structure of a multi-subunit protein
Select one:
a. 1-C, 2-D, 3-B, 4-A
b. 1-A, 2-C, 3-B, 4-D
c. 1-D, 2-A, 3-B, 4-C
d. 1-A, 2-B, 3-D, 4-C
e. 1-C, 2-D, 3-A, 4-B
In Protein Structure, the primary structure is a sequence of amino acids, the secondary structure involves local arrangements like α-helix and β-pleated sheet structures, tertiary structure details the larger 3D shape of a single polypeptide chain, and quaternary structure outlines the arrangements of multiple polypeptides in a protein.
The four levels of protein structure organization match with their definitions as follows:
Primary structure - A. Linear sequence of amino acids in the polypeptide chain
Secondary structure - C. Highly regular local sub-structures such as α-helix and β-pleated sheet structures
Tertiary structure - B. Three-dimensional structure of a polypeptide
Quaternary structure - D. Three-dimensional structure of a multi-subunit protein
Hence, the correct answer is option B.
The primary structure is determined by the sequence of amino acids that forms the polypeptide chain.
The secondary structure consists of local arrangements in the polypeptide chain such as α-helix and β-pleated sheet structures.
The tertiary structure represents the larger scale, three-dimensional arrangement of a single polypeptide chain.
Lastly, the quaternary structure is the arrangement of multiple polypeptides, or subunits, in a protein that has more than one polypeptide chain.
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Miguel lives near Miami, Florida. His home receives electricity from the Turkey Point power plant which uses nuclear energy to provide electricity to homes and businesses. What is used to provide energy in a nuclear power plant?
A.
chemical reactions
B.
nuclear fission reactions
C.
nuclear fusion reactions
D.
physical change
The energy in a nuclear power plant, such as the Turkey Point facility, is generated through nuclear fission reactions, where heavy atom nuclei split and release heat, facilitating electricity production.
Explanation:The Turkey Point power plant in Miami, Florida, which provides electricity to Miguel's home, uses nuclear fission reactions to generate energy. In a nuclear fission reaction, the nucleus of a heavy atom, such as uranium or plutonium, splits into two smaller nuclei. This reaction releases a large amount of heat energy, which is used to produce steam. The steam then drives a turbine connected to a generator, which in turn, produces electricity.
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What are the subatomic parts of the atom and what is their charge ?
The subatomic parts of an atom are the protons, neutrons, and electrons. Protons have a positive charge, neutrons have a neutral(no) charge, and electrons have a negative charge.
how might the speed of climate change affect the ability of life on earth to adapt and survive
Answer:As the climate warms, it changes the nature of global rainfall, evaporation, snow, stream flow and other factors that affect water supply and quality. Specific impacts include: Warmer water temperatures affect water quality and accelerate water pollution.
The speed of climate change might affect the ability of life on earth to adapt and survive as follows:
Climate change is a phenomenon that includes those alterations in climatic parameters: temperatures, precipitations, diverse climatic phenomena, etc.
Normally these types of changes occur over several centuries, allowing animal and plant species to gradually adapt to new weather conditions.
However, when the climate changes rapidly, ecosystems lose the opportunity to adapt, with the consequence of producing migrations of living beings and even the death of those who for some reason cannot migrate.
When the speed of climate change exceeds the speed of dispersal of organisms, or when there are barriers that prevent such dispersal, species can only adapt or become extinct.
Regarding individuals, it has been found that climate change could affect their development, physiology and behaviors during the growth, reproduction and migration phases. On the other hand, it is also probable that the modification in the precipitation patterns and the increase in temperature affect the distribution, size, structure and abundance of the populations of some species. This, added to the effects of climate change on the hydrological cycle, could affect the interactions between species, nutrient cycles and the functioning, structure and distribution of ecosystems.Therefore, we can conclude that the speed of climate change might affect the ability of life on earth to adapt and survive, causing ecosystems to lose the opportunity to adapt, thus causing changes in the stability and survival of populations.
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4. Which of the following was the key point of Darwin and Wallace's theory of evolution by natural selection?
differential reproduction
competition
overproduction
variation
Answer:
differential reproduction
Explanation:
I got it right on a quiz
Final answer:
The key point of Darwin and Wallace's theory is variation, leading to differential reproduction due to competition for limited resources, which causes populations to evolve over time through natural selection.
Explanation:
The key point of Darwin and Wallace's theory of evolution by natural selection is variation among organisms, which leads to differential reproduction as a consequence of competition for limited resources. The process described by Darwin as descent with modification involves these inherently varied organisms reproducing in greater numbers than the environment can support. Thus, those with advantageous inherited traits that confer a competitive edge are more likely to survive and reproduce, passing those traits on to the next generation more frequently than those without such traits. Over time, this leads to a change in populations over generations and results in species becoming better adapted to their local environments, a process known as adaptive evolution.
calculate what is the surface area to -valume ratio of a cube whose sides are 3cm long?
Answer:
2 : 1
Explanation:
The surface area of the cube;Area of one (1) side * 6 sides = 3 *3 * 6 = 54 cm²
Volume;Length * Width * Height = 3 * 3 * 3 = 27 cm³
Surface area – to – volume ratio;54 : 27 = 2 : 1
Of the three types of muscle pictured below, what type of muscle allows you
to move your leg to kick a soccer ball?
Answer:
Skeletal muscles
Explanation:
Skeletal muscles act on the bones and joints to power movement. To kick the ball, the skeletal muscles of the thighs and calves are responsible for the movement of the leg. The antagonist actions if muscles like the tibialis anterior and gastrocnemius below the knee move the knee joint. The skeletal muscles of the thighs quadriceps, the hamstrings, and the adductors move the leg from the hip joint.
Answer:
the smooth looking skeletal muscle there are no pictures provided
Explanation:
Jamie is explaining to her classmates that she conducted an experiment over the weekend to see if adding more eggs to a cupcake recipe would affect the taste and texture of her cupcakes. She told her classmates that she noticed her cupcakes were moister and even taller. She said she measured each cupcake and the ones made with 3 eggs instead of two were 0.25-.05 centimeters taller than the ones with only 2 eggs. She also said that the ones with more eggs seemed to be a darker shade than the ones with fewer eggs. Jamie said the amount of eggs didn’t affect how many cupcakes she could make. She was only able to get 6 jumbo sized cupcakes with the recipe even if she added an extra egg. Question: List at least 2 qualitative and 2 quantitative observations that Jamie made in her experiment. (4 points)
Answer:
Qualitative: moister, taller, and darker shade.
Quantitative: 0.25-0.5 cm taller, how many cupcakes she could make.
Explanation:
Qualitative is observation based and Quantitative is mathematical based (i.e. measuring, etc.)
Answer:
2 qualitative observations are -
a) Cupcakes were moister
b) Cup cakes with more eggs were darker in shade than cupcakes with fewer eggs.
2 quantitative observations are -
a) Cup cakes with 3 eggs instead of two were 0.25-.05 centimeters taller
b) Cup cakes were taller
c) She got 6 jumbo sized cupcakes with the recipe even if she added an extra egg
Explanation:
Qualitative observations are those which cannot be defined numerically. There are mostly expression, choice and perception based
While quantitative observations are purely numerical observation having some sort of measured value. or the factors that can be measured in terms of numbers are also included in observation criteria such as long, weighted etc.
2 qualitative observations are -
a) Cupcakes were moister
b) Cup cakes with more eggs were darker in shade than cupcakes with fewer eggs.
2 quantitative observations are -
a) Cup cakes with 3 eggs instead of two were 0.25-.05 centimeters taller
b) Cup cakes were taller
c) She got 6 jumbo sized cupcakes with the recipe even if she added an extra egg
Which two fields of study provide the core information that is used to classify organisms?
anatomy and artificial selection.
morphology and biochemistry.
morphology and anatomy.
artificial selection and biochemistry
Answer:
morphology and biochemistry
Explanation:
The two fields of study are: Morphology and anatomy
I'll give you an example of it, imagine that you found a mysterious insect in the forest, you don't know anything about it, you take it with you and give it to your biology teacher. The first thing that he is going to take a look at is at its anatomy, how the insect looks like, how many paws it has, wings, colors and etc.
After that, the teacher will probably ask you a few questions about the place you took the insect from, how was it, was it deep, lots of trees around, water near it, any fruit trees nearby, and by that, the teacher will analyze how this animal probably live, just by its habits with your information, if you're not sure about it, he'll need to check it out about how its body works, using again morphology and anatomy, and by doing that, is how you classify an organism.
How were Redi’s and Pasteur’s experiments different? Redi studied broth, but Pasteur tested meat. Pasteur studied flies, but Redi tested meat. Pasteur tested for microorganisms, but Redi studied larger organisms. Redi tested for microorganisms, but Pasteur studied larger organisms.
Answer: C. Pasteur tested for microorganisms, but Redi studied larger organisms.
Explanation:
Redi had conducted experiment with spoiling meat; Pasteur experimented with broth. Redi discredited spontaneous generation for huge life forms by delineating that the maggots emerged from meat just when flies laid eggs in the meat.
Pasteur utilized his celebrated swan-neck flask experiment, to part of the discussion. On his experiment air is permitted to contact the broth. Microorganisms present in the residue were not ready to explore the convoluted curves in the neck of the flask.
(B.) Redi experimented with rotting meat; Pasteur experimented with broth.
which best describes the structure of a DNA molecule!
A. Two strands of RNA linked together
B. Two strands of amino acids linked together
O
c. A strand of DNA linked to a strand of RNA
D. Two strands of DNA linked together
Answer:
D. two strands of DNA linked together
Explanation:
Which of the following processes enables cells to stay within the limited range of conditions in which they function best? a biodiversity b metabolism c adaptation d homeostasis
Answer:
D. Homeostasis
Explanation:
Homeostasis is the internal equilibrium maintained by the cells. If the homeostasis gets disturbed than diseases might occur. The cells maintain its equilibrium throughout the body. With the change in the external environment, the cells also adjusts itself to maintain its stability inside the body.
For example - at higher altitude, the oxygen concentration of the environment is less and to compensate the low oxygen content in the atmosphere, the number of red blood cell inside the body increases.
What would you expect to be the final plant height for a plant grown in eight hours of light?
5 inches
10 inches
15 inches
20 inches
The final height of a plant exposed to eight hours of light per day is dependent on multiple factors, not just light duration. This includes light intensity, temperature, water and nutrient availability, type of plant, and its genetics. Experimental controls are required to determine precise growth results.
Explanation:The final height of a plant grown under eight hours of light/day cannot be determined purely from that information. In biology, plant growth is influenced by a range of factors including light duration, but also light intensity, temperature, water, and nutrient availability, species of plant, and genetic factors. For instance, some plants could potentially thrive under eight hours of light/day and grow to approximately 20 inches, while others may only reach around 5 inches. Controlled experimentation is necessary to determine the specific growth results for a particular plant under an eight-hours-of-light routine.
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Without more context, it is impossible to accurately predict the final height of a plant grown in eight hours of light, as plant growth depends on a variety of factors.
Explanation:The final height of a plant grown in eight hours of light is impossible to determine without additional information. Plants need light for photosynthesis, a process where light energy is converted to chemical energy for growth. The plant's height, however, depends on factors like the type of plant, its growth rate which is genotypically determined, the intensity of light, the quality of soil, and the availability of nutrients and water. For instance, some plants might grow just an inch with such limited light, while others might not grow at all. But few might grow substantially. So, options like 5 inches, 10 inches, 15 inches, or 20 inches are not accurate without more context.
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how does crossing over contribute to genetic diversity
Answer:
Crossing over, or recombination, is the exchange of chromosome segments between non-sister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.
Explanation:
Crossing over is a genetic phenomenon that occurs during meiosis, resulting in the exchange of genetic material between homologous chromosomes. This process introduces new combinations of genes and contributes to genetic diversity. For example, crossing over can result in offspring with new color variations.
Explanation:Crossing over is a genetic phenomenon that occurs during meiosis, the process of cell division that produces gametes (sperm and eggs). It is the exchanging of genetic material between homologous chromosomes, resulting in the formation of new combinations of alleles. This process significantly contributes to genetic diversity in a population as it introduces new variations and combinations of genes.
During crossing over, portions of the chromatids of the homologous chromosomes break off and switch places with the corresponding portions on the opposite chromatids. This exchange of genetic material leads to the creation of recombinant chromosomes, which carry a unique combination of genes not present in either parental chromosome. These new combinations of genes can then be passed on to offspring, resulting in increased genetic diversity.
For example, let's consider a gene for flower color, where there are two possible alleles: red and white. If an individual carries one chromosome with the red allele and another chromosome with the white allele, crossing over can result in recombinant chromosomes carrying a red allele on one chromatid and a white allele on the other. This can lead to offspring with new color variations, such as pink or blend of red and white, contributing to genetic diversity within the population.
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