Answer:
Because of Nitrogen
Explanation:
Nitrogen seems to be much difficult for plants to acquire because they can only consume nitrogen when it is combined with oxygen or hydrogen, which is why tropical forests have a lusher plant growth than tundra.The decomposition process is the secret to maintaining the nitrogen cycle going since the bulk of fixed nitrogen arrives from decaying organisms and faces being broken down by bacteria.Please Help Me!!!
Which of the following is TRUE about the flagellum?
The flagellum is a hair-like structure present within the bacterial cell wall.
The flagellum is made up of flagellin proteins.
The flagellum is made up of carbohydrates.
The flagellum is not a mode of locomotion.
Answer:
So with the explanation the first or second statement might be true.
EXPLANATION:
a slender threadlike structure, especially a microscopic appendage that enables many protozoa, bacteria, spermatozoa, etc.
HOPE THIS HELPS SORRY I COULDNT GIVE YOU MORE INFO!
Answer:
A
Explanation:
i took the test
If a virus gets past your fist line of defense then your second line
of defense kicks in. Describe one of your second line defenses.
The second line of defense is a group of cells, tissues and organs that work together to protect the body. This is the immune system.
List three solutions that scientists are suggesting to solve the problems caused by monoculture farming.
Answer:
Three solutions that scientists are suggesting to solve the problems caused by monoculture farming is planting heirloom plants, practicing organic farming with a diversity of plants, and using genetically modified organisms.
Explanation:
what is transport system?short answer in plants
How long after the Big Bang before stars could form
A. 5billion years
B. 3 millions years
C. Stars formed immediately after the Big Bang
D. 3 billion years
Answer:
c.
Explanation:
Describe the difference between the retina's two photoreceptor cells.
Answer:
A cone is a visual receptor that assists individuals in processing daytime vision and color. A rod is a visual receptor that assists individuals in processing nighttime and peripheral vision.
Explanation:
. what edge said
There are two main types of photoreceptor cells of the retina -
Rod cells - Vision in poor lightCone cells - Colour vision and detailed vision in bright light.PhotoreceptorsPhotoreceptors are responsible for visual phototransduction. They convert light into biological signals.
Rod cells- contain rhodopsin that has large receptive fields and works best in dim light. They are in the outer side or peripheral area of the retina and do not distinguish color.
Cone cells - contain iodopsin, have small receptive fields and work best in high-intensity light.
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In which of the following cell structures are the Drosophila chromosomes
(DNA) located?
A. Lysosomes
B. Nucleus
C. Ribosomes
D. Vacuole
Answer:
DNA is found in the nucleus. So B.
Explanation:
DNA is found in chromosomes and chromosomes are found in the nucleus because the nucleus is basically the DNA of a cell.
In the nucleus, cell structures are the Drosophila chromosomes (DNA) located. The correct option is B.
What is chromosomes?The thread-like components known as chromosomes are found in the nucleus of both animal and plant cells. Protein and a single molecule of deoxyribonucleic acid make up each chromosome (DNA).
DNA is passed down from parents to children and contains the precise instructions that give each kind of living thing its individuality.
a component that can be found in a cell's nucleus. Proteins and DNA are arranged into genes on a chromosome. There are typically 23 pairs of chromosomes in each cell.
One chromosome is made up of one protein and one DNA molecule. Different chromosome sizes can be packed together into a nucleus thanks to proteins called histones.
The DNA for the Drosophila chromosomes is found in the cell's nucleus.
Thus, the correct option is B.
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Where is nitrogen often described as a limiting nutrient?
Answer:
In the open ocean, as on land, fixed nitrogen is one of the most important growth-limiting nutrients for photosynthetic organisms (primary producers) such as algae and marine bacteria.
Explanation:
Monomers are the building blocks of larger molecules called polymers. A polymer consists of repeating monomers bonded to each other with covalent bonds.
Use the draw pad to connect each monomer to its polymer.
Answer:
Explanation: It connects to each one shown below. All correct.
The monomer of DNA is a nucleotide. The monomer of glucose is carbon, hydrogen, and oxygen.
What are monomers and polymers?The simplest form of polymers is monomers. To create polymers, each monomer is combined. Usually, a double bond or triple bond holds the monomer together.
Typically, monomers contain two free electrons that pair together and create a double bond among themselves. The monomers of cellulose are an example of a monomer and contain glucose.
A monomer is a molecule that, when combined with additional monomers of the same kind, can create a polymer, such as glucose (C6H12O6). A biological polymer made of several -glucose units is cellulose, which serves as an illustration of this.
Therefore, the monomer of DNA is a nucleotide. The monomer of glucose is carbon, hydrogen, and oxygen. The monomer of their polymers is matched in the added picture.
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The model illustrates a process by which a substance is taken up by a cell. Which statements describe the process? Select the correct answer. a. The cell wall shown in the model is changed into a cell membrane. b. The process shown in the model requires energy from the cell. c. The cell membrane in the model remains intact throughout the process. d. The model shows the process of facilitated diffusion.
Answer:
The process shown in the model requires energy from the cell.
Explanation:
Active transport refers to the movement of materials across the cell membrane against concentration gradient.
The cell membrane remains intact. However, energy is required from within the cell to move materials into the cell against concentration gradient, hence the answer.
Answer: It's A I took the quiz and I chose A. I got it right.
Explanation:
true or false: light energy from the sun can be stored in the bonds of the carbohydrates, glucose
Answer:
True
Explanation:
Photosynthesis is the process by which organisms that contain the pigment chlorophyll convert light energy into chemical energy which can be stored in the molecular bonds of organic molecules (e.g., sugars).
what is the relationship between enzyme activity and 3d shape of an enzyme
Answer:
The reaction catalyzed by an enzyme is very specific. Most enzymes are proteins with unique three-dimensional configurations based on their amino acid sequence. The specificity of an enzyme can be attributed to the compatibility between the shape of the enzyme's active site and the shape of the substrate
Answer:
enzymes have a 3D shape to basically fit, like a puzzle and if it doesnt fit there is no activity
Explanation:
What is used to make progestogen, a hormone?
Answer:
Crinone and Prometrium, are made from a chemical called diosgenin that is isolated from wild yam or soy. In the laboratory, this constituent is converted to pregnenolone and then to progesterone
Explanation:
Elderly people fear dependency because
they lose their independence,
b. their status in society changes.
it necessitates new role behaviors.
all of the above
d.
I would say the answer is D
I hope this helps :)
According to the question, Elderly people fear dependency because all of the above.
What are old people worried about?Fear of losing independence as they grow older is a key concern across the ages. whether that could mean losing memory, being in poor health or not having financial security.
Thus, option "D" is correct.
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Which skill are you using when you useyour five senses to gather information?
A posing questions
B. observing
C. developing hypotheses
D. designing experiments
I need a answer by 6:00pm
Answer:
B
Explanation:
because you are paying close attention to everything
State the relationship between particle size and porosity
helppp
Answer:
The shape and size of the particles affect the way that they pack together in a certain amount of space, which affects a rock's porosity. ... But rocks change over time. When enough pressure, or force, is put on a rock, the pressure can make the rock pack its particles closer together.
Explanation:
I looked it up on google.
Answer:
the larger the particles the harder it is to pack the atoms together, however with the help from exterior forces they can be forced together.
Explanation:
Describe the chloroplast structure.
Answer:
The chloroplast has an inner and outer membrane with an empty intermediate space in between. Inside the chloroplast are stacks of thylakoids, called grana, as well as stroma, the dense fluid inside of the chloroplast. These thylakoids contain the chlorophyll that is necessary for the plant to go through photosynthesis.
Explanation:
When are electrons able to be pushed and move freely
What is the mechanism that allows species to change over time?
Answer:
evolution
Explanation:
Natural selection is a mechanism that drives evolutionary change. Simply put, it is the survival of traits that are favorable to an organism within its environment. Think of it in terms of the example above with the mice.
Which of the following will occur?
A: Water will love from side A to side B.
B: Water will move from side B to side A.
C: The solute will move from side A to side B.
D: The solute will move from side B to side A.
Answer:
The answer is D
Explanation:
Explain how the double helix structure of DNA aids in the function of replication.
Answer:
DNA is made up of a sugar phosphate backbone .
it has4 bases namely adenine ,thymine ,guanine and cytosine shortened to A T G C
adenine and thymine are connected by 2 hydrogen bonds and guanine and cytosine are connected by 3 hydrogen bonds
the two strands are anti parallel in nature ie, if one strand is from 3 to 5 the strand is from 5 to 3.. there are three types of DNA depending on the environment... they are adna bdna and zdna
Explanation:
hope it helps....
good luck
This diagram shows cellular activity across a cell membrane.
Glucose in high concentrations
outside the cell
100
Cell membrane
till
bu
Glucose in low concentrations
inside the cell
which two processes does this diagram most directly model?
Homiestasis and transport of molecules
Explanation:I know
HELP ASAP !!!
How do electromagnetic waves transfer energy?
A. They cancel vibrations in electric and magnetic fields,
B. They cause particles to move with them, WWW.
C. They cause vibrations in electric and magnetic fields,
D. They overlap electric and magnetic fields,
Answer: C
Explanation:
Electromagnetic waves transfer energy by they cause vibrations in electric and magnetic fields.
What do you mean by electromagnetic waves?Electromagnetic radiation consists of waves of the electromagnetic field, which propagate through space and carry momentum and electromagnetic radiant energy. It includes radio waves, microwaves, infrared, light, ultraviolet, X-rays.
Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.
Electromagnetic radiation exhibits wavelike properties such as reflection, refraction, diffraction, and interference, but also exhibits particlelike properties in that its energy occurs in discrete packets, or quanta.
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Most S-waves from an earthquake disappear at a distance of about 11,500 kilometers from the epicenter of the earthquake. Explain why this occurs in terms of structure of Earth's interion.
Answer:
When an earthquake occurs the seismic waves (P and S waves) spread out in all directions through the Earth's interior. Seismic stations located at increasing distances from the earthquake epicenter will record seismic waves that have traveled through increasing depths in the Earth.
Seismic velocities depend on the material properties such as composition, mineral phase and packing structure, temperature, and pressure of the media through which seismic waves pass. Seismic waves travel more quickly through denser materials and therefore generally travel more quickly with depth. Anomalously hot areas slow down seismic waves. Seismic waves move more slowly through a liquid than a solid. Molten areas within the Earth slow down P waves and stop S waves because their shearing motion cannot be transmitted through a liquid. Partially molten areas may slow down the P waves and attenuate or weaken S waves.
When seismic waves pass between geologic layers with contrasting seismic velocities (when any wave passes through media with distinctly differing velocities) reflections, refraction (bending), and the production of new wave phases (e.g., an S wave produced from a P wave) often result. Sudden jumps in seismic velocities across a boundary are known as seismic discontinuities.
Within the Earth, molten areas slow down P-waves and stop S-waves because shearing motion of the waves cannot be transmitted through a liquid.
Earthquake cause the seismic waves (P and S waves) that spread out in all directions even in the Earth's interior. Seismic waves move more slowly through a liquid than a solid.
Within the Earth, molten areas slow down P-waves and stop S-waves because shearing motion of the waves cannot be transmitted through a liquid.
Therefore, most of the S-waves of an earthquake disappear about a distance of 11,500 km from the epicenter.
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elements, which are unstable elements that release energy as
Absolute dating relies on
they break down.
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Absolute Dating
AKA. RADIOMETRIC DATING
We can learn about the past by studying the present.
The Principle of Uniformitarianism states that current geological processes are the same processes that were at work in the past. This principle was proposed by Charles Lyell in the 1800's
Absolute Dating
Involves finding the absolute age (actual age) of a rock or fossil.
Elements that emit particles and energy are radioactive.
As radioactive elements emit particles and energy, they form new isotopes or elements.
Answer:
radioactive
Explanation:
trust
Suppose a scientist measures the amount of DNA per cell of a particular diploid species at various stages of meiosis. She finds that the meiotic cells contain 3.7 pg, 7.3 pg, or 14.6 pg of DNA. Match each stage of the cell cycle to the corresponding amount of DNA contained within a cell at that stage.
1. metaphase II2. prophase I3. G14. after cytokinasis of meiosis II5. telophase I before cytokinesis6. G2
Answer:
1. metaphase II - 7.3 pg.
2. prophase I - 14.6 pg.
3. G1 - 7.3 pg.
4. after cytokinesis of meiosis II - 3.7 pg.
5. telophase I before cytokinesis - 14.6 pg.
6. G2 - 14.6 pg.
Explanation:
The cell cycle begins at G1, where all cells in humans (except for the gametes) have 23 pairs of chromosomes, 46 in total, and without any part of the DNA being duplicated. This is the stage in which the cell will have 7.3 pg of DNA.
After G1 comes phase S, which is the phase in which the DNA is duplicated to prepare the cell for the oncoming division; so we can infer that the phase that comes after S, G2, will have twice the DNA the cell had initially: 14.6 pg.
With this amount of DNA, the cell enters the first part of meiosis, in which the homologous chromosomes will be separated into two cells that will each carry on with the second part of meiosis. In prophase I, the cell is just beginning the process of meiosis, so it has 14.6 pg of DNA. In telophase I, the cell still has that amount of DNA because cytokinesis hasn't happened yet, and that is the defining step that ends up actually dividing the cell into two.
Meiosis II begins after cytokinesis I, therefore, the homologous chromosomes have already been separated and each cell has now 7.3 pg. In metaphase II the cell has 7.3 pg, but when cytokinesis of meiosis II ends, the cell will be half the size that was just before, because the sister chromatids are separated - this is where the cell will only have 3.7 pg of DNA.
The cells produced by meiotic cells are gametes, having only 23 chromosomes and the lowest amount possible of DNA.
V. Fill out table below
A positive ion
A negative ion
A positive ion
A negative ion
1. If an atom loses an electron, it becomes... (highlight one)
2. If an atom gains an electron, it becomes... (highlight one)
3. A hydrogen atom loses an electron. It becomes... (highlight one)
4. A sodium ion (Na) can ionically bond with which? (highlight one)
How do you know this?
H
H Н
K
ci
True
False
5. If an atom gains or loses a neutron, the charge of that atom changes. (highlight one)
6. If an atom gains or loses an electron, the atomic mass of that atom changes. (highlight one)
True
False
7. If an atom gains or loses a neutron, the atomic mass of that atom changes. (highlight one)
True
False
8. An atom with
valence electrons can covalently bond with another atom. (highlight one)
True
False
How do you know this?
Answer:
detail is given below
Explanation:
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. Proton has positive charge P⁺ and neutron is neutral n⁰ .
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The number of protons and electrons are always equal to make the atom electrically neutral and when an atom loses its valance electron the number of protons increases and thus positive charge increased and atom form cation.
Cation formation:
X → X⁺ + e⁻
When an atom gain electron negative charge increase because of more number of electron thus atom form negative ion or anion.
Anion formation:
X + e⁻ → X⁻
1) If an atom loses an electron, it becomes... (positive ion)
2) If an atom gains an electron, it becomes... (negative ion)
3) A hydrogen atom loses an electron. It becomes...(positive ion)
4) A sodium ion (Na) can ionically bond with which?
Sodium ion (Na⁺) can ionically bonded with Cl⁻ , thus both form salt which sodium chloride. Sodium ion can not bonded with hydrogen and potassium because both are also form cation.
5) If an atom gains or loses a neutron, the charge of that atom changes.
The given statement is false because neutron is neutral so when it added or removed from an atom there will be no effect on charge.
6. If an atom gains or loses an electron, the atomic mass of that atom changes.
The given statement is also false because atomic mass is sum of number of neutron and protons. So when electron is added or lost by an atom there will be no effect on atomic mass.
7. If an atom gains or loses a neutron, the atomic mass of that atom changes.
The given statement is true. Atomic mass is sum of number of neutron and protons. So when neutron is added or lost by an atom there will be effect on atomic mass. The atomic mass will be increase or decreased.
8. An atom with valence electrons can covalently bond with another atom.
The given statement is true. The valance electrons of an atom are involved in bonding. It could ionic, covalent or any other type.
Do ecosystems overlap or do they remain separate?
Answer:
Remain separate
they grow and die out and new ones grow.
Which type of cell is pictured on the right?
eukaryotic
prokaryotic
eukaryotic because it is nuclear
4. What are the functions of the nucleolus? (Choose all that apply)
regulating the cell's interaction with its surroundings
beginning ribosome assembly
translating the code contained by the DNA into the proteins the cell needs for structure and function
converting energy from food into a form the cell can use
Answer:B NUCLEOLUS IS WHERE DNA IS STORED
BRAINLIEST MEEEE
Explanation:
The nucleolus is the most conspicuous domain in the eukaryotic cell nucleus, whose main function is ribosomal RNA (rRNA) synthesis and ribosome biogenesis. AKA DNA !!!!
The function of the nucleolus includes 'beginning ribosome assembly'.
The nucleoli are eukaryotic organelles located within the cell nucleus that act as ribosome factories, in which the process of transcription (i.e., RNA synthesis) occurs constantly.
The nucleolus serves to make ribosomal subunits and then it sends ribosomal subunits to different cell destinations where they form full ribosomes.
In conclusion, the function of the nucleolus includes 'beginning ribosome assembly'.
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