Answer:
True
Explanation:
As a matter of geological record, the Earth's magnetic field has undergone numerous reversals of polarity. We can see this in the magnetic patterns found in volcanic rocks, especially those recovered from the ocean floors. In the last 10 million years, there have been, on average, 4 or 5 reversals per million years.
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Water is the most abundant molecule found in living organisms. Most mammals, in fact, are approximately 70% water by weight. About two-thirds of this water is present inside cells. The other one-third is present outside cells (e.g., in blood plasma or other body fluids). Why is water so important to cells?
Answer:
Water is an essential constituent of the protoplasm of living cells because it is directly involved in countless biochemical reactions like photosynthesis and respiration. Without it cells couldn't move waste and by-products, take in nutrients, perform intracelluar transportation, functioning and signalling
Explanation:
Water enters a cell when there is more salt IN the cell than the extracellular environment. This is an example
of
a. equilibrium
b. hypotonic
c. isotonic
d. hypertonic
Answer:
it would be b. hypotonic
in order to perform, a chemist needs an element that has similar properties to potassium (K) but has a lower atomic mass. which element should the chemist select for the experiment?
A. Robidium (Rb)
B. Sodium(Na)
C. Magnesium(Mg)
D. Calcium(Ca)
The element needed by the chemist to perform the experiment with similar properties to that of potassium, while having lower atomic mass is option B. Sodium.
If we take a look at the periodic table, we can see all the elements that share properties with potassium are located within the same column. Some examples are :
SodiumRubidiumCesium LithiumOf the elements listed, only two are found within the options for this question, which means that we can discard option C and D.
We can then proceed to analyze the atomic mass of each element in an attempt to choose the option with a lower atomic mass than Potassium. Option A, Rubidium, has an atomic mass that is much higher than the 39 of potassium, which means we can discard option A. The correct choice is option B, Sodium , since it shares similar properties and has an atomic mass of 22.
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❗️❗️How can you tell the limit of the carrying capacity on a
on a graph?
pls help
Stabilizing selective pressures result in _______. a. rapid, broad evolutionary changes b. limited evolutionary changes c. an increase in genetic diversity d. extreme gene distributions
Answer:
B
Explanation:
Answer:
B. limited evolutionary changes
Explanation:
State on way how forests could be restored
Answer: reduce agriculture
Explanation:
What is the genetic molecule?
a)RNA
b)DNA
c)adenine
d)ATP
e)purine
Answer:
DNA is a genetic molecule
Explanation:
Though both the nucleic acids can act as genetic material, DNA is much more preferred. DNA is stable both chemically and structurally which make it well-built genetic material.
Hope u get it
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Question 8 of 10
What is the scientific process?
A. A series of random science discoveries
B. A method used to answer scientific questions
C. A way to use scientific measurements
Ο Ο
D. A group of logical science questions
SUBMIT
what happens to a enzyme after it has completed a reaction?
Answer: The enzyme will always return to its original state at the completion of the reaction. One of the important properties of enzymes is that they remain ultimately unchanged by the reactions they catalyze. After an enzyme is done catalyzing a reaction, it releases its products (substrates).
Enzymes are not consumed in the reaction, they can continue catalyzing more reactions, they can remain bound to the product or they can be degraded.
What are enzymes?Enzymes are biomolecules that catalyze chemical reactions in living organisms. They are typically proteins, although RNA molecules known as ribozymes also exist. Enzymes are responsible for many of the metabolic processes that occur in cells and are essential for life. They are highly specific, meaning that they typically only catalyze one or a few specific reactions, and they increase the rate of reactions by reducing the activation energy required for the reaction to occur.
After an enzyme has completed a reaction, it is still present and can continue to catalyze more reactions. Enzymes can catalyze thousands of reactions per second, and they can remain active for long periods of time. However, enzymes can also be inactivated or destroyed by various factors, such as high temperatures, changes in pH, or the presence of certain chemicals
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what is soil fertility
Answer:
Soil fertility is the ability of soil to sustain plant growth and optimize crop yields.
Explanation:
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Salmonella typhi is a bacteria that reproduces by splitting into two
identical organisms. What type of asexual reproduction is this?
1Binary Fission
2O Vegetative Propagation
3Budding
4Fragmentation
Answer:
Binary fission
Explanation:
Binary fission is a type of asexual reproduction in bacteria in which two identical daughter cells arise from a new cell. It is asexual in the sense that it does not require two parents but only one.
According to this question, Salmonella typhi is a bacteria that reproduces by splitting into two identical organisms. This is evidently a type of BINARY FISSION reproduction by the bacteria cell.
Why is water found in different phases on different objects in our solar system?
Earth is the only known planet to have bodies of liquid water on its surface. Europa is thought to have subsurface liquid water. ... Evidence points to water on other planets in our solar system. In 2015, NASA confirmed that liquid water flows intermittently on present-day Mars..
Which of the following correctly describes the image below? (5 points)
a
Protein Molecule
b
RNA Molecule
c
Amino Acid
d
Carboxylic Acid
When you want to move a part of your body, your brain sends a signal to
the muscles....
The muscles Contract and relax randomly
Contract and pull on bones directly
Contract and pull on tendons, which pull on the bones
Answer:
Contract and pull on tendons, which pull on bones
Explanation:
Muscles don't attach directly to bones. The tendons throughout our body serve as a connective tissue, connecting the two. Skeletal muscles, which seem to be attached to bones, are still only held there with the help of muscles.
Tell 2 human activities by which carbon can enter the atmosphere as
CO2 during the carbon cycle:
Answer:
Activity 1. Breathing (Humans breathe out CO2)
Activity 2. Burning (Which releases CO2 into the atmosphere
Explanation:
The two human activities by which carbon can enter the atmosphere as [tex]CO_2[/tex] during the carbon cycle are:
Breathing (Respiration): Breath out [tex]CO_2[/tex] in the atmosphere. Burning/Fire: causes the release of [tex]CO_2[/tex] in the environment. What is the Carbon cycle?The flow of carbon and its compounds by different means in the atmosphere is known as the Carbon cycle.
Human activities can play an important role in the cycling of carbon into the atmosphere. Each and every step of the carbon cycle directly or indirectly depend on human activities. For example Fire, respiration, industrial wastes, automobiles, etc.
Therefore, above are the two human activities by which carbon can enter the atmosphere [tex]CO_2[/tex] during the carbon cycle are described briefly.
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. An astronaut weighs 120 Newton’s on the moon, where the strength of gravity is 1.6 N/Kg. What is her
mass in Kg?
Answer:
75 kg
Explanation:
answer is above
Describe a food web that includes a blue whale, krill, tuna and a shark. Add other organisms to make it work.
can someone help me with this??
Answer:
Carnivore.
Explanation:
As you follow the arrow, you notice how the snake eats the mouse, not grass or any other plant. :)
A wet mount of unstained Elodea ( a green aquatic plant) is observed using high power (400x) of a compound light microscope. Which structures would most likely be observed? ribosome, Golgi complex, and vacuole ribosome, Golgi complex, and vacuole nucleus, chloroplast, and cell wall nucleus, chloroplast, and cell wall centrosome, lysosome, and plasma membrane centrosome, lysosome, and plasma membrane cytoplasm, endoplasmic reticulum, and nucleolus
Answer:
The correct option is "nucleus, chloroplast, and cell wall"
Explanation:
The specimen described in the question is said to be green aquatic plant. Hence, the organelles expected to be viewed are those present in a pant cell.
Although, nucleus (stores the genetic material) is present in both plant and animal cells, however, chloroplast (to provide the green colour for the aquatic plant) and cell wall (for the cell's rigidity and support) are only found in a plant cells.
Which of the following are biological macromolecules?
Question 2 options:
carbon
lipids
carbohydrates
nucleic acids
proteins
fatty acids
Answer:
The four types of macromolecules are carbohydrates, lipids, proteins, and nucleic acids.
Explanation:
So, your answer would have to be lipids, carbohydrates, and proteins, and nucleic acids. Fatty acids and carbon are not macromolecules.
Which cells in your body undergo cellular respiration?
Answer:prokaryotic cells
Explanation:I’m just smarts
The Prokaryotic cells
The aluminum atom electrons to form an ion. The ion that is formed is
Answer:loses
Explanation:
I did the assignment
Answer: Loses
Positive
Explanation:
write a short note on pelvic girdle
Answer:
Pelvic Girdle. In human anatomy, Pelvic Girdle is a basin-shaped structure of bones that connects the trunk of the legs and holds the support of the intestines, urinary bladder, and the interior sex organs.It is also termed as the bony pelvis.
Explanation:
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It is thinner but denser plate.
As this plate ducts molts
Continental
Continenta
Oceanic
anir
f
Answer:
Oceanic plate
Explanation:
The oceanic plate is the thinner but denser plate. At a convergent margin, this plate is known to subduct under the lighter continental plate.
Oceanic plates have an average thickness of about 6km. They are rich in ferromagnessian minerals. These minerals are much denser than those of the silicates that make up the continental plate.
Oceanic plates produce volcanic rocks especially basalts when they melt. They have a density of 3.0g/cm³ whereas continental plates have a density of 2.7g/cm³How many calories are in a mg of sodium?? Please help i’m bout to end my life
Which statement best compares a multicellular organism to a single-celled organism?
Answer:
A multicellular organism has organ systems that interact to carry out life functions, while a single-celled organism carries out life functions without using organ systems.Explanation:
-3. Proteins are made where in the cell?
Plssssss this was supposed to be done Friday can u pls help me
a)Based on the permanent number of metal or non-metal we can find the valence of the other element .Also based on where in the group or column is placed metal or non-metal.
b) - (i dont know now )
which of the following organelles is most likely to affect apoptosis?
Answer:
mitochondria
Explanation:
Answer:
mitochondria
Explanation: