Which of the following substances is responsible for transporting materials into and out of the cell by active transport? A. Carbohydrates B. Proteins C. Cholesterol D. Lipids
why the answer is C not D?
Answer:
Diffusion describes the movement of particles from an area of higher to lower concentration. That is what the ink is doing when it spreads throughout the jelly. Osmosis only occurs across a semipermeable membrane.
Answer:
osmosis is movement of particles through a semipermeable membrane from the region of high concentration to region of low concentration while diffusion is the movement of particles from a region of higher concentration to a region of lower concentration.
Explanation:
here there is no semipermeable membrane hence the correct answer is diffusion.
When electrons transfer from one atom to another, both atoms become Choose... and they are held together by a(n) Choose... bond. When electrons are shared between atoms, a(n) Choose... bond forms between the atoms, and the joined atoms become a(n) Choose... .
Answer:
This question is incomplete as it lacks a word bank, the word bank are:
Ions
Electrons
Isotopes
Molecules
Covalent
Negative
Ionic
Molecular
Hydrogen
Point
Element
Ionic compound
The answer is:
1. Ions
2. Ionic
3. Covalent
4. Molecule
Explanation:
An ION is a charged atom i.e. an atom with positive (+) or negative (-) charge, which results when an atom loses or gains electrons respectively. The ions of different elements are held together by bonds called IONIC BONDS, which are bonds that form as a result of the difference in electric charges or electrostatic forces between the atoms involved. For example, an ionic bond forms between NaCl because there is an electrostatic force between the positive Na+ ions and negative Cl- ions.
However, on the contrary, when electrons are shared between atoms, a COVALENT BOND is formed. The atoms share their valence electrons to form a MOLECULE, which comprises of two atoms.
lunar eclipse? solar eclipse? ms Garcia’s students are studying the topics. they are making the model seen here.
1. what type of eclipse are they trying to model?
2. what does the golf ball represent?
3. explain, what must happen for this eclipse to occur
Answer:
1. The students are trying to model a solar eclipse.
2. The golf ball represents the moon in this context.
3. For this type of eclipse to be made possible, the both the Earth and the Moon must be in allignment with the Sun, while the Moon also has to be between the two.
.... is an example of what extrusive rock. *
gabbro
basalt
Granite
diamond
Basalt is an example of what extrusive rock.
Explanation:Extrusive igneous rocks form when magma reaches the Earth's surface a volcano and cools quickly. Most extrusive (volcanic) rocks have small crystals. Examples include basalt, rhyolite, andesite, and obsidian.
ocean trenches are most often formed when
Answer:Ocean trenches are driven by tectonics and are most commonly found along the Pacific Ocean in a zone known as the ring of fire. They are usually formed at the boundaries of convergent plates, at a region where a continental plate submerges beneath an oceanic plate.
Explanation:
Identify the type of mutation that occurred and explain in what way it affected the protien
Answer:
The type of mutation that occurs when in the DNA strand there is a change from guanine to cytosine is a nonsense mutation, since the triplet that should encode the amino acid encodes a stop codon and the protein cannot be completely synthesized.
Explanation:
The nonsense mutation consists of a change in one of the bases of the stranded DNA, which is transcribed into an altered mRNA, producing a stop codon, instead of an amino acid.
In the table it is observed that the CCA codon is a stop codon that cuts off the protein synthesis prematurely, leaving it incomplete and probably non-functional.
Sometimes this type of mutation can alter the sequence of amino acids but the protein may be complete enough to partially fulfill its function.
HIV can remain latent for several years and not cause any symptoms in its host. What viral reproduction cycle is occurring during this latency period? What viral reproduction cycle is occurring once a person moves into the acquired immunodeficiency syndrome (AIDS) stage of HIV infection?
Answer:
The lytic cycle.
Explanation:
HIV is a retrovirus that has a special enzyme called transcriptase reverse, which can synthesize DNA using RNA as a template. This replication system is particularly useful for the virus because the DNA synthesized from the RNA viral genome can be then integrated into the human chromosomes and stay inactive for years. This is called a lysogenic cycle and is characterized by a latency of the virus and an integration to the host DNA.
When there is a triggering event, this latent virus can be excised from the human chromosome and start producing copies of itself using the host machinery. Then the virions are assembled and after that they lyse the host cell and release new infective units that can then infect neighboring cells. This is called the lytic cycle of the virus and is the reproduction cycle that occurs when a person moves into the acquired immunodeficiency syndrome (AIDS) stage of HIV infection.
In seedless plants, haploid gametophytes are produced from
A; diploid spores that undergo mitosis.
B: haploid spores that undergo meiosis.
C; diploid spores that undergo meiosis.
D; haploid spores that undergo mitosis.
Answer: It's A!!
Explanation:
Answer:
diploid spores
In seedless plants, haploid gametophytes are produced from a diploid spores that undergo mitosis.
Explanation:
The top of the saturated zone is known as A. the aquifer B. the water table C. the unsaturated zone D. spring rock
Answer:
B. the water table
Explanation:
The question above is related to the topic on "Groundwater."
Groundwater is considered "fresh." It falls into the soil and gets soaked in it. It can stay stored for many years. It is very beneficial because it serves as a source of water for many residential places.
The storage of groundwater relies on two zones: unsaturated zone and saturated zone. The unsaturated zone is the first layer under the surface area of the land. It is followed by the "water table," which lies a little farther from the land surface. After which is the saturated zone where you can find particles of different rocks.
The top of the saturated zone is known as the water table. Therefore, option (B) is correct.
The water table divides the saturated zone, where water fills the crevices between soil or rock particles, from the unsaturated zone, which is air-filled. Precipitation, groundwater exploitation, and seasonality affect the water table. It controls groundwater supply and flow.
Spring or surface water bodies can form where the water table meets the land. Managing water supplies, analysing groundwater flow patterns, and assessing groundwater contamination require water table monitoring.
Learn more about water table, here:
https://brainly.com/question/32088059
#SPJ6
If researchers use only the number of coral found in dive 1, calculate the predicted population of brain coral in a reef that covers 120m squared. i forgot how to do this :))
Answer:
40
Explanation:
Each quadrant measured = 2m X 2m
Length = (2+2+2) m = 6m
Width = 2m
Total area = area of (quadrant 1 + quadrant 2 + quadrant 3)
Total area = 6 * 2 = 12 m^2
Number of coral found in dive 1 = 4
Population density = 4/12 = 1/3 (0.33)
Now,
=> Population density = (Predicted population)/area
=> 1/3 = PP/120
=> PP = 120/3 = 40
So, the required answer is 40.
The predicted population of brain coral in a reef covering 120m² is ; ≈ 40
First step : Calculate the value of the default population density
Population density = population size (dive 1) / total area
= 4 / 12 = 0.33
Total area ;
∑ Area of each reef quadrant = length * width = 2 * 2 = 4m²
∴ Total area = 4 + 4 + 4 = 12m².
Final step : Determine the value of the predicted population of brain coral
Population density = ( predicted population ) / predicted area
0.33 = ( pp ) / 120m²
∴ Predicted population ( pp ) = 0.33 * 120
= 39.6 ≈ 40 brain corals
Hence we can conclude that the predicted population of brain coral is 40
Learn more : https://brainly.com/question/16495075
An atom is smaller than an element.
Answer:
an element is made of 1 atom
Explanation:
probably an atom is smaller
Answer:
True
Explanation:
Atom is smaller than Element , Because atoms are smallest indivisible particles of matter and the only substances considered to be smaller than the atom are the sub atomic particle Eg proton electron neutron
PLEASE HELP ME !
When did whale ancestors begin living full time in the water?
A) before they nursed under water
B) after they began eating a carnivorous diet
C) before they evolved gills
D) after they lost their hind legs
Answer:
40 million years ago
The earliest whales that we think were fully aquatic, that is, they never left the water, are found around 40 million years ago, during the middle Eocene. That means that the transition from terrestrial animals to fully aquatic animals took about 12 million years.
Explanation:
Answer:
After they nursed under water
Explanation:
Which of these chemicals is not a pollutant?
A. Nitrogen gas
B. Nitrate
C. Methane
D. Carbon dioxide
having a hard time
Answer:
Carbon dioxide
Ice floats because
a.)ice is hydrophobic
b.) water is more dense as a solid
c.)ice is hydrophilic
d.)water is less dense as a solid
And Explain
Answer:
D
Explanation:
Because ice less dense than the water.
Which is the region of actively dividing
cells at the tip of the stem?
Answer:apical meristem
Explanation:
Explain at least three ways in which a mutation in an individual's DNA could occur, and describe at least 2 effects a mutation could have on an individual's traits
Answer:
Mutations can occur from the following ways:
1. Errors that occur in DNA replication during cell division
2. Exposure to high-energy electromagnetic radiation
3. Exposure to chemicals mutagens
Effects of mutation include:
1. Genetic disorders
2. Cancers
Explanation:
A mutation is a change or alteration that occurs in the DNA sequence of a cell of an organism. These mutations can be passed on to offsprings of that organism. Mutations can occur from the following ways:
1. Errors that occur in DNA replication during cell division: during the process of cell division, the DNA in cell are copied many times. Some errors result when copying DNA, most of which are corrected during proofreading. However, some changes in the DNA sequence may not be corrected, thus resulting in a mutation.
2. Exposure to high-energy electromagnetic radiation: some types of electromagnetic radiation are ionizing, such as UV rays and X-rays. Prolonged exposure to these ionizing radiation may result in permanent damage to parts of the DNA, thereby resulting in a mutation.
3. Exposure to chemicals mutagens: mutagens are substances which are able to cause mutations. Some common chemical mutagens are alkylating agents such as ethylmethane sulfonate and N-methyl-N-nitrosourea.
Effects of mutation include:
1. Genetic disorders: in genetic disorders, certain normal functioning of the body processes are impaired. For example, hemophilia whereby blood lacks the ability to clot normally resulting in excessive bleeding.
2. Cancers: cancers occur when the cell of the body differentiate and grow abnormally. Various types of cancers include breast cancer, prostrate cancer, blood cancer etc.
What gives a male widowbird greater reproductive success?
Answer:
Food and feeding
The long-tailed widowbird's diet generally consists of seeds, supplemented occasionally by arthropods. The birds do most of their foraging in flocks on the ground, though they are occasionally observed hawking insects airily.
please help asappppp
Answer:
Cell X
Explanation:
Cell X is the only cell that has chloroplasts, a pigment found in leaf cells of plants / sometimes other parts may have too. Animal cells almost never have chloroplasts
What would be the amino acid sequence for the mRNA strand AGGCAGUUG?
Answer:
please tell me if my answer is not helpful
Explanation:
Finish mRNA depletion & library generation in under 6.5 hours. Compatible with Illumina NGS systems. Request a sample. Higher success rates. Easier protocol. Includes cleanup beads. Includes adaptors. Feedback at each step. Lot to lot consistency.
please tell me if my answer is not helpful
A cell with two pairs of each set of chromosomes is called a diploid cell. These cells are typically found throughout the body tissues and are called [ germ / somatic ] cells.
Answer:
somatic
Explanation:
What composes a photosystem?
The "special chlorophyll" molecules in the reaction center are what the photosystem will use to absorb all of the sun's energy.
What is a photosystem?A core complex and a periphery antenna system referred to as the light-harvesting complex I (LHCI) for PSI and the light-harvesting complex II (LHCII) for PSII, respectively, make up each photosystem.
Light-harvesting structures and reaction hubs make up photosystems. To two unique chlorophyll molecules in the reaction center, pigments in the light-harvesting complex transfer light energy.
Sunlight is captured in the chloroplast by pigment chlorophyll molecules arranged into photosystems.
Therefore, the light-harvesting complex, which consists of pigments, and the reaction center make up the photosystem.
Learn more about photosystem, here:
https://brainly.com/question/13836853
#SPJ6
How do ecologists define an ecosystem?
Answer:
An ecosystem consists of all the organisms in an area, the community, and the abiotic factors that influence that community. Ecosystem ecologists often focus on flow of energy and recycling of nutrients. Biosphere: The biosphere is planet Earth, viewed as an ecological system.
There are two main nutrients that compost supplies plants. What are they. Choose Two Carbon Sunlight Nitrogen Water
Answer:
Carbon and nitrogen
Explanation:
Question 5 of 10
Which energy source is renewable?
A. Geothermal
B. Coal
C.Oil
D. Natural gas
Answer:
A
Explanation:
geothermal energy, solar energy, and wind energy increased, and in 2019, the combined percentage share of these renewable energy sources was greater than the combined share of wood and hydro energy.Jun 22, 2020
explain what is meant by 'double circulation' of blood
Answer:
♡ hiya there, human! ♡
- double circulation of blood means that the blood passes through the heart two times per circuit.
hope I could help! have a great day.
-madi/madeline
✧･ﾟ: *✧･ﾟ:･ﾟ✧*:･ﾟ✧･ﾟ: *✧･ﾟ:･ﾟ✧*:･ﾟ✧
Explanation:
what is the mutation caused by the addition of a nucleotide to an already existing Gene sequence called
Answer:
mutation caused by the addition of a nucleotide to an already existing gene sequence called deletion duplication insertion inversion
Explanation:
Explain the relationship between crossing over
and genetic variation.
What are brown fields
Answer: In urban planning, brownfield land is any previously developed land that is not currently in use that may be potentially contaminated.
Explanation:
CAN SOMEONE CHECKS THIS QUESTION TO SEE IF IM RIGHT THIS IS FOR A MAJOR GRADE!
Deborah has Cystic Fibrosis, a serious genetic defect that interferes with the body's ability to transfer salt and water to and from the body. The defect causes secretions in her body to be thick instead of the normal thin secretions in healthy people. These secretions clog her passageways which can be life-threatening. The following pedigree shows her family in which some individuals are affected by Cystic Fibrosis.
QUESTION: If Deborah marries a man unaffected by Cystic Fibrosis, which of the following describes the possibility that her daughter will be affected by Cystic Fibrosis?
ANWSER=25%
Answer: yeah I think you right
Explanation: