Scientists create models to help make sense of the natural world. Models are powerful tools that help scientists predict how things work. Models should be scientifically testable. When a model fails to predict correctly, the model must be revised or replaced. A good example of this kind of model would be one that represents an animal or plant cell as drawing to illustrate the parts of the cell.
Answer:
The answer is C, two dimensional module
Explanation:
I took the k12 test.
12. What biological organisms are in topsoil?
decaying and living plant and animal life
fossil remains from millions of years ago
nutrients from basic building material
Kard soil, clay, and large rocks
Answer:
Many of the millions of organisms that live in the soil, including bacteria, fungi, insects, and earthworms, are known as decomposers. They live on the remains of dead plants and animals and break down these organic remains into simple chemicals that are released into the soil.
Explanation:
what would be a likely result of expressing telomerase in somatic cells?
Answer:
cancer
Explanation:
wilkins and franklin studied the structure of dna using
Answer:
x ray diffraction pattern
Explanation:
what direction does rna polymerase synthesize rna?
Answer:RNA polymerase synthesizes an RNA transcript complementary to the DNA template strand in the 5' to 3' direction. It moves forward along the template strand in the 3' to 5' direction, opening the DNA double helix as it goes.
Explanation:
pls help science kills me
Answer:
false
Explanation:
its the other way round!
Answer:
i am 90% sure its false
Explanation:
proteins for sure helps with strength and elasticity, id k what minerals do.
in a neuron, sodium and potassium concentrations are maintained by the sodium-potassium exchange pump such that __________.
Answer:
the sodium concentration is higher outside the cell than inside the cell and the potassium concentration is higher inside the cell than outside the cell.
Explanation:
In a neuron, sodium and potassium concentrations are maintained by the sodium-potassium exchange pump such that the sodium concentration is higher outside the cell than inside the cell and the potassium concentration is higher inside the cell than outside the cell.
What is sodium potassium pump?The sodium potassium pump contributes to the maintenance of osmotic equilibrium and membrane potential in cells. Sodium and potassium move in the contrast way of the concentration gradients.
The Na+ K+-ATPase pump establish and maintain a gradient of higher sodium concentrations extracellularly and higher potassium levels intracellularly.
The sodium-potassium pump is critical to the proper functioning of neurons. It aids in the maintenance of ionic concentrations both inside and outside the cell, allowing neurons to fire action potentials, which is the basis for electrical signaling within neurons.
The sodium-potassium exchange pump maintains sodium and potassium concentrations in neurons so that the sodium concentration is higher outside the cell than inside the cell and the potassium concentration is higher inside the cell than outside the cell.
Thus, this way, sodium and potassium concentrations are maintained by the sodium-potassium exchange pump in a neuron.
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Even though human proteins are made from only 20 different amino acids, there are thousands of differen proteins found in human cells. What allows for so much variation in the proteins?
Answer:
Amino acids are the basic building blocks of proteins, and they serve as the nitrogenous backbones for compounds like neurotransmitters and hormones. In chemistry, an amino acid is an organic compound that contains both an amino (-NH2) and carboxylic acid (-COOH) functional group, hence the name amino acid. Proteins are long chains or polymers of a specific type of amino acid known as an alpha-amino acid. Alpha-amino acids are unique because the amino and carboxylic acid functional groups are separated by only one carbon atom, which is usually a chiral carbon. In this article, we will solely focus on the alpha-amino acids that make up proteins
Explanation:
I hope i helped
Which table shows two steps of DNA replication?
DNA replication is a process where the polymerase enzyme adds complementary nucleotide bases in the parent DNA strand, hence option h polymerase matches adenine to thymine is correct.
What is DNA replication?The process by which a double-stranded DNA molecule is duplicated to form two identical DNA molecules is known as DNA replication.
Replication is necessary because when a cell splits, the two new daughter cells must have the same genetic information, or DNA, as the parent cell. In vitro DNA replication (DNA amplification) is also possible (artificially, outside a cell).
To begin DNA synthesis at known sequences in a template DNA molecule, DNA polymerases isolated from cells and artificial DNA primers can be utilized.
Therefore complementary base pairing of nucleotide base pairing, hence option h is correct.
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Select the correct answer. Which animal has a single-loop circulation? A. human B. fish C. housefly D. earthworm E. octopus
20 points help asap plz
Fish.
I hope this is right. ^^
Answer:
B. Fish
Hope this helps!
Explanation:
How do human beings affect the carbon dioxide and oxygen cycle?
Answer:
Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. The ocean absorbs much of the carbon dioxide that is released from burning fossil fuels.
Answer:
By breathing.
Explanation:
Humans inhale oxygen, and when they need to release it, (exhale) that oxygen is no longer oxygen and is now carbon dioxide. Trees and plants are what helps oxygen to exist in our world even though we breathe it in and convert it to carbon dioxide. Hope this helps ^^
Mention some of plant organs
Answer:
Root,stem,Leaf and flower
Answer:
Plants are made up of organs, including roots, leaves, the stem and reproductive organs.
Each organ has its own functions.
Together, the organs of a plant allow it to carry out the seven processes of life.
Explanation:
neuroglial cells that produce cerebrospinal fluid are called
Answer:
Ependymal cells
Explanation:
Ependymal cells line the spinal cord and ventricles of the brain. They are involved in creating cerebrospinal fluid
Podrían las plantas realizar la fotosíntesis sin ellas respirar ?
Answer:
No, porque si no pueden respirar morirían, a pesar de que es una planta, son seres vivos y los seres vivos requieren aliento.
Explanation:
Para realizar la fotosíntesis, las plantas necesitan dióxido de carbono / oxígeno.
what is the alternate name for 0 degrees latitude
Answer:
the Equator
The Equator is the line of 0 degrees latitude.
Explanation:
I HOPE ITS HELP YOU
Answer:
0 degrees latitude is known as the equator.
Explanation:
hope this helps. . .
good luck! uωu
Which statement about the specific immune response is FALSE?
Each T or B cell has antigen receptors for only one specific antigen.
T and B cells recognize antigens by using antibodies bound to their surface membranes.
Unique antigen receptors are created by genetic recombination.
Antigens must be presented by an MHC molecule for T and B cells to recognize them.
All cells express MHC-I molecules, but only antigen-presenting cells express MHC-II molecules.
What is metastasis and what body systems are involved in the process?
Answer:
Metastases most commonly develop when cancer cells break away from the main tumor and enter the bloodstream or lymphatic system. These systems carry fluids around the body.
Explanation:
In metastasis, cancer cells break away from where they first formed, travel through the blood or lymph system, and form new tumors in other parts of the body.
Which of the following best describes differences between birds and reptiles?
O Birds are endothermic and have four-chambered hearts, while reptiles are ectothermic and have three-
Birds have feathers a brain and sensory organs, while reptiles have scales and a brain but lack senso
Birds are vertebrates and have specialized lungs, while reptiles are invertebrates and have gills and sca
Birds lay eggs and are ectothermic while reptiles undergo internal fertilization and are endothermic.
Answer:
(A) Birds are endothermic and have four-chambered hearts, while reptiles are ectothermic and have three-chambered hearts.
Explanation:
got it right on the test
Birds and reptiles both belong to the animal kingdom. Reptiles are ectothermic and have three-chambered hearts, whereas birds are endothermic and have four-chambered hearts. Thus, option A is correct.
What are the characteristics of birds and reptiles?Birds and reptiles both belong to the kingdom Animalia and are chordates. They both have vertebral columns and the presence of the backbone. They share many similarities and differences in their physical appearances.
The birds are endothermic and can maintain constant body tempearture regardless of the external environment. While reptiles are ectothermic (cold-blooded) and regulate their temperature based on the external environment.
The birds have four-chambered hearts like mammals that separate the oxygenated from the de-oxygenated blood, whereas the reptiles have three-chambered hearts with one ventricle and two atria.
Therefore, the birds are endothermic, and reptiles are ectothermic.
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state one reason why the movement of molecules in method C represents active transport.
Answer:
Because molecules are moving from an area of low concentration to an area of higher concentration and thats require energy
Which of the following is a structure of the lower respiratory tract?
Answer:
c. Bronchioles
Explanation: is correct. post protected
What first caused people to consider that the continents were once one large landmass?
glacier evidence in warmer countries
continents looked like they fit together
studying the valleys of the ocean floor
similar fossils were found on many continents
Answer:
Continents looked like they fit together. Which continents contain fossils of Mesosaurus, an extinct reptile, in similar regions of Pangaea?
Answer:
B
Explanation:
these tiny blood vessels transport absorbed nutrients.
Answer:
we called them capilary
Answer:
Capillaries
Explanation:
Capillaries are tiny blood vessels which transport absorbed nutrients, blood, and oxygen to all cells in the human body. They also connect arteries and veins together.
In December 2004, a tsunami (giant wave) destroyed many of the marine organisms along the coast of the Indian Ocean. What can be expected to happen to the ecosystem that was most severely hit by the tsunami?
A. The ecosystem will change until a new stable community is established.
B. Succession will continue in the ecosystem until one species of marine organism is established.
C. Ecological succession will no longer occur in this marine ecosystem.
D. The organisms in the ecosystem will become extinct.
Answer: A
Explanation:
It varies but "A" is the most legitimate answer.
definition of tissue
The group of similar cells which work together to perform a particular function is called a tissue....
You may take help from the attachment....
The ordered array of an organism's chromosomes is called a(n)
allele
pedigree
karyotype
mutation
Answer:
allele is the best answer there
Answer:
I understand you probaly don't need this answer anymore but the correct answer is Karyotype.
Explanation:
Ufbufbioaerubvfbiahffbbeaifhfia help me
which kind of damage to dna can be caused by x-rays?
Explanation:
Alpha particles, beta particles and X-rays can directly affect a DNA molecule in one of three ways: Changing the chemical structure of the bases; Breaking the sugar-phosphate backbone; or. Breaking the hydrogen bonds connecting the base pairs.
✌️
A filamentous decomposer with cellulose cell walls could be a(n) __________. View Available Hint(s) for Part A algae water mold fungus helminth
Answer:c
Explanation:
A filamentous decomposer with cellulose cell walls could be a water mold.
Where is amoebae found?Amoebae are found worldwide and are very common in soil, fresh water, and other habitats.
Do fungi have cell walls?
Fungal cells also contain mitochondria and a complex system of internal membranes, including the endoplasmic reticulum and Golgi apparatus.
Hence , B is correct option
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1. Rocky Mountain spotted fever is a bacterial infection transmitted by a tick. What type of symbiosis occurs between a deer and the tick?
A. Mutualism
B. Commensalism
C. Parasitism
2. The oxpecker is a bird that eats the insects off the back of a zebra or rhino? What type of a symbiotic relationship is this?
A. Mutualism
B. Commensalism
C. Parasitism
3. Humans have “good” bacteria in their digestive tract, which assists in digesting food. The bacteria thrive there. What type of a symbiotic relationship is this?
A. Mutualism
B. Commensalism
C. Parasitism
4. Barnacles attach themselves to whales in order to be where food is available and also for transportation. This does not hurt the whale? What type of a symbiotic relationship is this?
A. Mutualism
B. Commensalism
C. Parasitism
Mutualism examples
Answer:
1. C
2. A
3. A
4. B
Explanation:
hope this helps. ♥️
Parasitism is the type of symbiosis that occurs between a deer and the tick. So, the correct option is C. This is because bacteria infect their host cell which is found in Deer.
What do you mean by Symbiosis?Symbiosis may be defined as a relative ecological association between the individuals of two or more different species.
The type of symbiotic relationship found between oxpecker and zebra is Mutualism. This is because oxpecker is able to get its prey (food), while zebra is benefitted from the removal of insects from their body. So, the correct option is A.
The type of symbiotic relationship between Humans and bacteria living in their digestive tract is Mutualism. This is because Humans are benefitted from bacteria as they assist in digesting food, while bacteria also benefit to find a proper place where unlimited food is available. So, the correct option is A.
The type of symbiotic relationship between Barnacles and whales is Commensalism. This is because Barnacles are benefitted from excess food and easy transportation, while whales are neither benefitted nor harmed by this relationship. So, the correct option is B.
Therefore, each of the questions are properly described above.
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what would be the independent, dependent, and control variable to how coral dies? (100 points)
Answer:
in the explanation
Explanation:
The independent variable would be us humans polutling the ocean with oil and other plastics destroying the coral reefs. The dependant variable is an abbrasive species of fish becoming overpopulated and killing all the fish that help the coral grow causing the coral to die. (independant variable basically means humans tampering with it causing the problem. dependent is naturally occuring humans cant control whether a fish overpopluates or not thats natural)