Minerals are naturally-formed substances that have a specific chemical properties: abiogenic (minerals are not produced by or derived from living organisms, non-organic in origin), stable at room temperature (i.e. at 25 degrees C) , are represented by a known chemical formula , have an ordered atomic arrangement/structure. Coal is not classified as a mineral because it is an organic substance. Correct answer: D (coal is formed from the remains of dead plants and animals).
Global convection cells move warm air
Within the ocean
to polar regions
To high pressure areas
To the equator
i think the correct answer is this
to the equator
Is the cytoplasm living or dead? ...?
How do cell differentiation and cell division work together?
Clownfish, a small tropical fish found in the midst of sea anemones, are often not stung. What type of relationship might the clownfish have with the sea anemones that would explain this behavior?
How does one determine when an ecosystem is in balance
Answer and explanation:
It is said that an ecosystem is balanced when there is a functional system that helps the prompt recovery of wildlife after some natural event of disastrous characteristics.
This means that it is necessary to have flora and fauna in good condition, with a food chain of predators and preys, that toxic gases have decreased or disappeared, among other issues. We will find a balanced ecosystem when the relationship between natural organisms and human beings is pleasant and harmonic enough and does not imply a risk to nature and its conservation.
A scientist conducted one trial of an experiment and got unexpected results. How can the scientist increase confidence in the results?
by repeating the experiment several times
by changing the experimental procedure
by asking other scientists what they think about the results
by modifying the results so they are close to the expected results
Answer:
By repeating the experiment several times
Explanation:
What is the purpose of interphase in the cell cycle?
Answer:
A). active growth and metabolism of the cell
Explanation:
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What is the part of the mantle that contains soft rocks?
What is the sequence of events in the germination of a starch seed?
The germination of a starch seed involves the seed absorbing water, the emergence and growth of the radicle and shoot, expansion of cotyledons, and growth into a seedling, all supported by the metabolism of stored starch.
Explanation:The sequence of events in the germination of a starch seed is a crucial biological process. Germation begins when a seed, which has been dormant, encounters favorable conditions such as moisture or the right temperature, which triggers the germination process. Seeds often require specific conditions to end dormancy, such as exposure to light, cold, or fire, or going through chemical treatments. The germination process itself typically involves several key steps.
The seed absorbs water and swells, breaking the seed coat.The embryonic root, or radicle, emerges first and begins to grow downward to anchor the plant and absorb water and nutrients.The shoot, or plumule, grows upward and eventually emerges from the soil.The cotyledons, or seed leaves, may emerge from the soil and expand to begin photosynthesis, if they are present above the ground.The seedling continues to grow, developing true leaves and beginning to look more like the adult plant.The starch stored within the seed is metabolized by the embryo to provide the energy needed for these physical changes until the seedling can produce its own food via photosynthesis.
who invented found that animals are composed of cells
Answer:
Theodor Schwann
Explanation:
Large doses of antibodies given to fight an infection are likely to destroy becteria that produce vitamin K. In which digestive organ do we find such beneficial bacteria?
A. Stomach
B. Large Intestine
C. Liver
Which best describes the function of the cell wall in cells?
A.
supports the frame of a cell
B.
maintains the cell's nuclear structure
C.
modifies sugar into usable energy
D.
moves materials within the cell
Which two of your senses are linked together (i.e., influence your perception of both)?
taste and touch
touch and smell
smell and taste
taste and sight
The correct answer is smell and taste.
The sense of taste and smell are related to one another because they have the same types of receptors. Odor comes from the molecules that is present in the air that stimulates the receptors that is present inside the nose. If one is not able to smell the or its sense of smell is non functional then it cannot have the sense of taste for the same food. This is caused due to the relationship between the smell and taste receptors.
Answer:
Sight
Explanation:
Which of the following describes a state of equilibrium?
Select one:
a. when water molecules have stopped moving or vibrating
b. when the concentration of water outside the cell is the same as the concentration inside the cell
c. when the roots of a tree absorb nutrients from the cell
d. when a cell with a lot of water continues to absorb water
The statement that describes a state of equilibrium is when the concentration of water outside the cell is the same as the concentration inside the cell. The correct option is b.
What is the equilibrium state?The equilibrium state is the state which shows the total; potential energy of a system and this is a stationary phase of the system.
In this instance, we can say that the body is in an equilibrium state, in which everything is in harmony and nothing stands out or is neglected. In this manner, all the elements that enable a body to function will do so normally, in a controlled manner.
Here, the cell is in an equilibrium state, when there is no transfer of material.
Thus, the correct option is b. when the concentration of water outside the cell is the same as the concentration inside the cell.
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Final answer:
A state of equilibrium in biology, called an isotonic solution, occurs when the concentration of solutes outside the cell is the same as inside the cell, resulting in no net movement of water. This allows the cell to maintain its shape and function. Different concentrations of solutes can lead to hypertonic or hypotonic solutions, causing water to leave or enter the cell, respectively.
Explanation:
Equilibrium in biology refers to a state in which the concentration of solutes outside the cell is the same as the concentration inside the cell, known as an isotonic solution. In this state, there is no net movement of water across the cell membrane, and the cell maintains its normal shape and function. When the concentration of solutes outside the cell is different from the concentration inside the cell, it can lead to a state of hypertonic or hypotonic solution, causing water to either leave or enter the cell, respectively.
Classification of living things takes into consideration all of the following except
a. number of cells.
b. presence of cell membranes.
c. presence of a nucleus.
d. mode of nutrition.
The concentration of a sugar is high inside a cell and slightly lower outside the cell. What is most likely to occur if the sugar molecules can cross the membrane?
a. sugar molecules move inside the cell membrane.
b. sugar molecules move toward the nucleus.
c. sugar molecules maintain their concentration gradient.
d. sugar molecules move outside of the membrane.
The right answer is d. sugar molecules move outside of the membrane.
The simple diffusion is the diffusion through the plasma membrane (in the direction of the strong concentrations towards the weak concentrations, until equilibrium concentrations on both sides of the membrane). In the case that we have, the most concentrated compartment in glucose (that is inside the cell) will let it escape and go to the extracellular compartments until reaching equal concentrations between the two compartments.
Which is the best definition of translucent?
A. An object that allows some light to pass through.
B. An object that blocks all light.
C. An object that reflects all light.
Answer:
A.
Explanation:
Translucent materials allow light to pass through but the object is not fully visible. In this case, "an object that allows some light to pass through" matches the description of translucent.
Each enzyme has a temperature at which it works best. A slight increase in temperature can increase enzyme activity while a large increase in temperature can cause the enzyme to become denatured. Which of the following best explains what happens when a protein becomes denatured? ...?
The enzyme absorbs heat until the temperature decreases, and the reaction then continues normally.
The enzyme breaks apart into the amino acids that originally combined to form the enzyme.
The enzyme loses its shape and is no longer able to catalyze chemical reactions.
The enzyme unfolds and refolds into a different shape, and is used to catalyze a different chemical reaction.
Answer:
Option (3).
Explanation:
Enzymes are the bio catalyst that can increase the rate of a bio chemical reaction without themselves going under any change. Enzyme decreases the activation energy of the reaction and increases the rate of reaction.
Denaturation of protein results in the loss of biological activity of enzyme. The enzyme loses its shape and cannot catalyze the reactions as enzymes are shape specific.
Thus, the correct answer is option (3).
Denaturation of an enzyme results in the loss of its three-dimensional structure and its ability to catalyze reactions due to an irreversible change in shape caused by high temperatures.
When an enzyme becomes denatured, it loses its shape and is no longer able to catalyze chemical reactions. This is because the high temperature causes a disruption of the chemical bonds, such as hydrogen bonds, within the protein structure, leading to an irreversible change in the enzyme's three-dimensional shape. The correct explanation for what happens when an enzyme becomes denatured is that 'The enzyme loses its shape and is no longer able to catalyze chemical reactions'. It is not related to the enzyme absorbing heat, breaking into amino acids, or refolding to catalyze different reactions.
Geologists use radioactive dating for which of the following?
(A). Identifying the relative ages of rock layers.
(B). Determining the absolute ages of rocks.
(C). Telling how radioactive substances is
(D). Collecting evidence of fossils.
Geologists use radioactive dating for determining the absolute ages of rocks and minerals using radioactive isotopes. So, option B is right.
Radioactive dating is a technique used to date rocks and minerals utilizing radioactive isotopes. Igneous and metamorphic rocks can benefit from this technique.
Age of rock can be determined using radioactive dating, which measures the decay of radioactive isotopes.
Option (A) is incorrect because radioactive dating is not used to identify but determine the age of rock.
Option (C) and (D) is incorrect because radioactive dating does not tell how radioactive substances is or used to collect evidence of fossil.
Therefore, the answer is (B).
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In the two-stage cooling method, what is the maximum amount of time allowed to cool food from 135 degrees F or more to 70 degrees F or less?
blank______ is the transfer of pollen from the male reproductive structures to the female of seed plants
Pollination is the transfer of pollen from the male reproductive structures to the female of seed plants.
Pollination is the process of transferring pollen from the male reproductive structures to the female parts of seed plants, leading to fertilisation and seed production. It can occur via self-pollination or cross-pollination, the latter being particularly important for genetic diversity. There are two primary types of pollination: self-pollination and cross-pollination. Self-pollination occurs when pollen from an anther is deposited on the stigma of the same flower or another flower on the same plant. Cross-pollination involves the transfer of pollen from the anther of one flower to the stigma of another flower, usually on a different individual of the same species. Cross-pollination is vital for genetic diversity and is carried out by various agents, including insects, birds, bats, and the wind.
In angiosperms, or flowering plants, pollen is transferred from the anther to the stigma of the same or different flower. In gymnosperms, such as conifers, this involves the movement of pollen from a male cone to a location within the female cone. After pollination, in both angiosperms and gymnosperms, the pollen germinates to form a pollen tube, which eventually leads to fertilisation and seed production.
Red blood cells have cell membranes that allow water, oxygen, carbon dioxide and glucose to pass through. all other materials are blocked form entering. this makes the membrane
Are dikaryotic fungi always heterokaryotic? ...?
The northern red-legged frog, or Rana aurora, is found along the western coast from British Columbia to Northern California. Their typical breeding season lasts from January to March. The foothill yellow-legged frog, or Rana boylii, is found along the western coast from northern Oregon to central California. Their typical breeding season lasts from April to July. What mechanism might keep Rana aurora and Rana boylii from mating?
A. anatomical isolation
B. temporal isolation
C. geographic isolation
D. behavioral isolation
Answer:
B. Temporal Isolation
Explanation:
In the induced-fit model of enzymes, a substrate associates itself with which part of an enzyme?
A) The denatured site .
B) The amino acid site .
C) The active site .
During the winter you become sick with the flu. Shortly after that, you become sick with strep throat. Will the same type of B-cells that fought the pathogen that caused the flu fight the pathogen that causes strep throat?
a
Yes. Every B cell is capable of fighting every pathogen with which it comes in contact.
b
Yes. B cells recognize similar antigens such as bacterial and viral pathogens.
c
No. B cells fight viruses while T cells fight bacteria.
d
No. Each B cell is capable of recognizing one specific antigen.
During the winter you become sick with the flu. No. Each B cell is capable of recognizing one specific antigen.
What are the functions of B-cells?White blood cells of a certain type that produce antibodies. B cells are produced by stem cells in the bone marrow and are a component of the immune system. as well known as B lymphocyte.
B cells influence antimicrobial defenses and tissue inflammation, contribute in T-cell activation by antigen presentation, costimulation, and cytokine release, and—most importantly—serve as regulatory cells.
The generation of antigen-specific immunoglobulin (Ig) targeted against invasive pathogens is mediated by B cells, which are at the center of the adaptive humoral immune system.
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what happens when a piece of dna is missing
Missing a piece of DNA can have a substantial impact on an organism's biology. The results can range from minor changes to severe genetic abnormalities.
If the deleted DNA segment contains important genes, it may impair the production of particular proteins, resulting in functional defects or loss of important cellular processes. Furthermore, the disappearance of regulatory DNA sequences can lead to unregulated gene expression, which can alter the timing and amount of protein synthesis.
If significant amounts of DNA are missing, chromosomal abnormalities can arise, resulting in developmental diseases or syndromes. Additionally, DNA loss may affect the stability and integrity of the genome, resulting in greater genetic instability or increased susceptibility to other genetic disorders.
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How many cells are made in mitosis?
Mitosis produces two genetically identical daughter cells from one parent cell. This cell division process involves multiple stages to ensure accurate genetic replication and distribution. The resulting two cells are vital for growth and repair in organisms.
Mitosis is a process of cell division that results in two genetically identical daughter cells from a single parent cell. During this process, the nucleus divides, ensuring that each daughter cell inherits an exact copy of the parent cell's chromosomes. Hence, in mitosis, you start with one cell and end up with two cells, each with a complete set of genetic material.
Stages of Mitosis
The process is divided into several stages: prophase, metaphase, anaphase, and telophase, followed by cytokinesis. By the end of telophase and cytokinesis, the original cell has divided into two identical cells.
These two newly formed cells are crucial for growth, healing, and various other functions in multicellular organisms. Each of these cells maintains the same number of chromosomes as the parent cell, ensuring genetic consistency.
what three components make up a nucleotide
nucleotide consist of phosphate groups, five-carbon ribose sugar and nitrogenous bases (adenine, thymine (DNA only), uracil (RNA only), cytosine, guanine make nucleic acid
what is nucleic acid ?Nucleic acids are the primary center for storing all genetic information where deoxyribonucleic acid is the center for storing all the genetic information.
The genetic material is inheritable which can transfer from the parents to the children that means from one generation to another.
for example the characters such as hair color, hair type, eye color are some of the genetic information carried nucleic acids.
all the Nucleic acids are composed of nucleotide monomers linked together, consist of three parts such as Nitrogenous bases include purine molecules (adenine and guanine) and pyrimidine molecules (cytosine, thymine, and uracil.)
In DNA, the five-carbon sugar is deoxyribose, while ribose is the pentose sugar in RNA.
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The function of a plant's cambium layer is to (1 point)transport water. transport nutrients. produce food. produce new cells.