Why are decomposers essential to a balanced ecosystem?
Answer:
Decomposers are like the housekeepers of an ecosystem. Without them, dead plants and animals would keep piling up with the nutrients the soil needs trapped inside. Decomposers clean up the dead material by processing it and returning the nutrients to the soil for the producers.
A biologist is studying a population of zebras that seems to be suffering from a disease that debilitates their bones. He
collects a sample of bones from the carcass of a deceased animal. He finds that the bones have a mass of 7.15
grams and occupy a volume of 5.5 cubic centimeters. What is the density of the bones?
O 1.0 g/cm
O 1.3 g/cm
O 1.8 g/cm
O2.0 g/cm
Answer:
1.3 g/cm
Explanation:
ok so to get this answer what you need to do is look at the cubic centimeters and contrast it with the grams
Answer:
b) 1.3 g/cm3^
Explanation:
Which of the following performs the phosphorus cycle A) Autotrophs C) Carnivore B)Heterotrophs D) Herbivore
Answer:
The autotrophs are the ones that perform the phosphorus cycle.
Explanation:
A is correct because the autotrophs are the organisms that are able to consume the inorganic phosphates, use them, and release parts of them in the other spheres, thus contributing to the phosphorus cycle.
B is not correct because the heterotrophs are not organisms that can process inorganic matter and produce their own food, instead, they are dependent on the autotrophs to do that.
C is not correct because the carnivores are not able to consume and process inorganic phosphates, with their food sources being based around the primary and secondary consumers.
D is not correct because the herbivores use the producers (autotrophs) as their food source, and they are not able to process inorganic phosphates on their own.
List the two stages in the process of photosynthesis.
Answer:
Plants take carbon dioxide in and release oxygen
Explanation:
Answer:
They are:
The light-dependent reactionsThe light-independent reactions, or Calvin CycleHope this helps ; )
Which of the following are functions (jobs) of the cell membrane?
Answer:
Biological membranes have three primary functions: (1) they keep toxic substances out of the cell; (2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles and between the cell and the outside environment; and (3) they separate vital but incompatible metabolic processes conducted within organelles.
PLEASE HELP. I WILL GIVE YOU BRAINLIEST!
Which terms correctly identify the indicated structures in this sketch of a cell viewed under a microscope?
Drag and drop a term to match each label.
Answer:
A: The right answer is Vacuole
Vacuoles are organelles present in plant cells. It is a large single structure, of variable shape according to the cells, delimited by a lipid membrane called tonoplast.
The vacuoles allow the storage of water, ions, sugars, ... and by magnifying, play an important role in the growth of the plant.
B: The right answer is Mitochondria
Mitochondria are organelles present in eukaryoptic cells. The mitochondrion is composed of a double membrane, the inner membrane being folded into mitochondrial ridges.
Mitochondria are the organelles that produce the energy of the cell. The mitochondria thus have a role of power station for the cell. They are the ones who perform cellular respiration.
C: The right answer is Cell membrane (the inside layer)
All cells (prokaryotic and eukaryotic) are separated from their environment by a palsmic membrane.
The plasma membrane is the line of demarcation between the cell and its environment (= envelope of the cell).
It determines what goes into the cell and what comes out of it. Like all biological membranes, the plasma membrane has a selective permeability, that is to say it is allowed to pass through certain substances more easily than others.
The plasma membrane consists of a double lipid layer in which proteins are inserted.
D: The right answer is Chloroplast
Chloroplasts are important organelles specific to plant cells. Chloroplasts appear green ... They contain chlorophyll, a pigment that captures solar energy.
Choroplasts perform photosynthesis, that is, they absorb sunlight and use it for the manufacture (synthesis) of organic compounds from carbon dioxide and water.
E: The right answer is Lysosome
The lysosome is a small spherical structure (a vesicle) delimited by a lipid membrane located in the cytoplasm of eukaryotic cells. The membrane contains ion channels (proton pumps) that allow the active entry of H + ions, in order to maintain an acid pH (between 3.5 and 5) within the lysosomal vesicle.
Lysosomes are organelles of eukaryotic cells that contain a mixture of digestive enzymes used to degrade macromolecules.
Lysosomes are considered the "stomach" of the cell.
F: The right answer is Endoplasmic reticulum
The endoplasmic reticulum are organelles of eukaryotes that extend throughout the cytoplasm (like a labyrinth). These are organelles that produce proteins and play a vital role in the development of the other membranes of the cell.
Explanation:
Dont forget my brainliest
In 1918, the tsar (king) and tsarina (queen) of Russia and their five children were presumably assassinated and buried in an unmarked grave. Later, several women came forward and claimed that they were in fact Anastasia, one of the daughters whose bones had not been found. More recently, forensic scientists have extracted DNA, including mtDNA, from the skeletal remains of the tsar (father), tsarina (mother), and children. Which of the following samples of mtDNA would NOT be helpful in confirming that a woman is Anastasia?
a. the tsar and tsarina and living relatives of each of them.
b. each of the claimants or their living children.
c. the tsar, tsarina, and the other assassinated children.
d. the tsar and tsarina only.
e. the tsarina and the claimants.
The correct answer is B. Each of the claimants or their living children.
Explanation:
One of the basic principles in genetics establishes genes are passed from the parents to their offspring. Indeed, children receive 50% of genes from each parent. This implies the daughter of the tsar and tsarina will have share part of the DNA including mtDNA (mitochondrial DNA) of her mother, father, and siblings.
According to this, to prove if someone is Anastasia or not, it is possible to use the mtDNA sample from the tsar, tsarina, or death children but not from the claimants. This is because the claimants are not confirmed relatives of the tsar or the tsarina, and therefore their DNA cannot be used to determine if a woman is the daughter of the tsar and tsarina. Indeed, a woman claiming to be Anastasia can share DNA with another claimant and this does not prove they are related to the tsar and tsarina or that the woman is the real Anastasia.
Matthew records the temperature outside for one day. From 10:00 a.m. to 12:00 p.m., the temperature rises 4°C. From 12:00 p.m. to 2:00 p.m., it rises another 3°C. From 2:00 p.m. to 4:00 p.m., it drops 2°C. Which of the following predictions about how the temperature will change between 4:00 p.m. and 6:00 p.m. is most reasonable?
Group of answer choices:
The temperature will drop 14°C.
The temperature will stay the same
The temperature will rise 3°C.
The temperature will drop 4°C.
Answer:
the tempature will drop 4 degrees c
Explanation:
What a the difference between microfilaments and microtubules?
Answer:
The main difference between microtubules and microfilaments is that microtubules are long, hollow cylinders, made up of tubulin protein units whereas microfilaments are double-stranded helical polymers, made up of actin proteins.
Name a protein structure
Answer: Types; Examples : Transport (Hemoglobin, albumin )
Structural, (Actin, tubulin, keratin ), and Hormones, (Insulin and thyroxine).
Explanation: Protein structure is the three-dimensional arrangement of atoms in an amino acid-chain molecule. Proteins are polymers – specifically polypeptides – formed from sequences of amino acids, the monomers of the polymer. A single amino acid monomer may also be called a residue indicating a repeating unit of a polymer.
There are seven types of proteins: antibodies, contractile proteins, enzymes, hormonal proteins, structural proteins, storage proteins, and transport proteins.
It is convenient to describe protein structure in terms of 4 different aspects of covalent structure and folding patterns. The different levels of protein structure are known as primary, secondary, tertiary, and quaternary structure. The primary structure is the sequence of amino acids that make up a polypeptide chain.
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3. Plants have properties that make them practical source of foods. Which
property make them good source of foods?
A, resistance
B, mechanical C. chemical
D. physical
Answer:
C
Explanation:
The property of plants that makes them a good source of food is the chemical property.
Plant lock-up energy in them in the form of carbohydrate which is derived from the process of photosynthesis. The energy from the sun is converted into chemical energy and when plant-consuming organisms feed on them, the chemical is broken down and the energy is released for the metabolic activities of the body.
These two processes can be expressed as equations:
1. [tex]6CO_2 + 6H_2O + energy --> C_6H_1_2O_6 + 6O_6[/tex]
2. [tex]C_6H_1_2O_6 + 6O_6 --> 6CO_2 + 6H_2O + energy[/tex]
The correct option here is C.
Which greenhouse gas is produced by commercial refrigeration and air conditioning systems?
A. Carbon Dioxide
B. Fluorinated Gas
C. Nitrous Oxide
D. Methane
Answer:
B. Fluorinated Gas
ok
Air conditioners and fridges involves greenhouse gases which are hydrofluorocarbons. In commercial refrigeration and air conditioning systems carbon dioxide gases is produced.
What is greenhouse gas?Greenhouse gases trap heat in atmosphere and warm the Earth.
The main gases involved are carbon dioxide, methane, nitrous oxide, water vapors etc. It also involves flourinated gases.
Carbon dioxide is primary greenhouse gas, which is emitted by human activities.
Thus, option A is correct.
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Match the transposition pathway with its correct description. Answers may be used more than once or not at all.
1. Retrotransposon pathway
2. Direct cut pathway
3. Cut and paste pathway
4. Replicative pathway
Transcription pathway
A. Involves removing a segment of DNA and placing it in a new location; the number of TE is not increased.
B. Involves the copying of DNA.
C. Involves the translation of proteins.
D. N/A E. Involves an RNA intermediate and the reverse transcriptase enzyme
Answer:
1. Retrotransposon pathway: E. Involves an RNA intermediate and the reverse transcriptase enzyme
3. Cut and paste pathway: A. Involves removing a segment of DNA and placing it in a new location; the number of TE is not increased.
5. Transcription pathway: B. Involves the copying of DNA.
4. Replicative pathway: C. Involves the translation of proteins.
2. Direct cut pathway: D. N/A
Explanation:
Class I transposable elements (also known as retrotransposons) are genetic mobile elements that copy and paste into other loci by reverse transcription and integration of the cDNA into new genomic regions
Class II transposable elements (also known as DNA transposons), can move by two different mechanisms of transposition:: 1-cut-and-paste pathway: the DNA transposon leaves one locus and integrates into another genomic site. and 2-replicative pathway: the DNA transposon remains in one locus while new copies of its sequence are mobile. The replicative pathway requires a transposase enzyme that acts as a catalyst of transposition.
How are proteins and carbohydrates similar?
Answer:
Proteins consist of units called amino acids, strung together in complex formations. Because proteins are complex molecules, the body takes longer to break them down. As a result, they are a much slower and longer-lasting source of energy than carbohydrates. There are 20 amino acids.
Answer:
they both give us energy
Explanation:
What are three things that eukaryotic cells have? Write in two sentences
Answer:
They have membrane bound organelles as well as a membrane bound nucleus.
Here's extra: "Endoplasmic reticulum, microtubules, and the Golgi apparatus are unique to eukaryotic cells, and will not be found in prokaryotes."
which part of the atom always has the same number?
Answer:
electrons as protons
Explanation:
what determines whether an atom will form a bond with another atom
Answer:
The amount of valence electrons
Explain how available energy changes at each trophic level. What happens to the energy that is lost?
Answer:
Energy decreases as it moves up trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level. Trophic level transfer efficiency (TLTE) measures the amount of energy that is transferred between trophic levels
need help please ):
A specific ligand is polar in nature. Where is the ligand-binding portion of the receptor most likely to be located?
Answer:
on the extracellular side of the cell membrane
Explanation:
Ligands can be defined as signaling molecules that interact with receptors localized on target cells. Protein ligands are generally polar and soluble in water. In consequence, they tend to bind with extracellular domain receptors localized on the cell surface, on the outside surface of the cell. Some examples of protein ligands include, among others, hormones (e.g., insulin), growth factors, neurotransmitters, etc.
this is responsible for providing shape to the cell
What do a bacteria an a elephant have in common
Answer:
similar metabolism
Explanation:
Which of the following is a balanced equation.
Helpp
Consider the denaturation equilibrium between native Ribonuclease A and unfolded protein. Ribonuclease A is a 124 amino acid protein with four disulfide bridges. To test the importance of one of the disulfide bridges in protein stability, residues Cys58 and Cys110 were mutated into Ala. The protein denaturation parameters for Ribonuclease A wild-type and mutant are shown below. All values are in kJ/mol.
wt: ΔH: 297.2
TΔS: 254.6
ΔG: 42.4
mutant: ΔH: 184
TΔS: 183.2
ΔG: 0.8
Mark the following statement as True or False: Denaturation is spontaneous for both enzymes.
A. True
B. False
Answer:
False
Explanation:
We know from thermodynamics that;
When ∆G is positive the process is not spontaneous
When ∆G is negative the process is spontaneous
When ∆G is zero, the system has attained equilibrium.
In both cases, ∆G is positive hence the denaturation of both enzymes is not spontaneous, hence the answer above.
Match the part of the wave to the diagram.
Amplitude / Energy
Trough
Crest
Wavelength
A⇢Amplitude
It refers to the maximum displacement of a particle from it's resting positionB⇢Wavelength
The distance from one crest/trough to another crest/troughC⇢Crest
It's the a.pex of the waveD⇢Trough
It's the lowest surface part of a wave
Describe what happens when an enzyme is placed in
environments that have different pH levels or
temperatures than its regular environment.
Answer:
If your just looking for the "why" then this is what i do know about it.
Explanation:
Changes in pH cause amino acids' component atoms and molecules to ionize. This can make an enzyme change shape. These shapes determine function, so changing the shape can impair the enzyme's function, preventing it from speeding up chemical reactions.
Higher temperatures disrupt the shape of the active site, which will reduce its activity, or prevent it from working. The enzyme will have been denatured . Enzymes therefore work best at a particular temperature.
Hope this helps.
Which is the property of nonmetals to evaporate easily?
brittle
dense
liquid
volatile
Volatile is the property of nonmetals to evaporate easily. The correct option is D.
What is being volatile means?The ease with which a material vaporizes is described by its volatility. A volatile material is defined as
A compound that readily evaporates at normal temperatures.One with a measurable vapor pressure. Basically, the term volatile refers to liquids.Volatility is a substance quality in chemistry that characterizes how easily a material vaporizes.
An active ingredient with high volatility is more likely to exist as a vapor at a given temperature and pressure, whereas a substance with low volatility is more likely to exist as a liquid or solid.
The enthalpy of vaporization describes the temperature dependence of the vapor pressure, while vapor pressure is the physical property that conveys a compound's volatility at a given temperature.
Thus, the correct option is D.
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Describe how waves behave when they interact with a barrier or boundary.
Answer:
Reflection involves a change in direction of waves when they bounce off a barrier; refraction of waves involves a change in the direction of waves as they pass from one medium to another; and diffraction involves a change in direction of waves as they pass through an opening or around a barrier in their path.
What are two ways that you could change the path of light? what materials would you need to do it?
If a disease caused the death of 50 percent of the individuals in the 25-40 year old age range, this would have minimal effect on the individuals in younger and older age ranges.
True
False
Answer:
The answer is actually false i took this lesson on oddseyware already :)
Explanation: