Select ALL the correct answers.
Some individuals of a particular species of sea bird underwent a genetic mutation that resulted in larger beaks. The larger size of beaks helped
these birds to break open dams and other mollusks for food. It also helped them defend themselves against predators. After many generations,
almost all of the birds in the population had big beaks. For which two reasons did this phenomenon occur?
A. natural selection
B. mechanical Isolation
C. prezygotic barriers to reproduction
D. high genetic variation in the species
Answer:
The answers would be A and D I think
Explanation:
how do obligate anaerobes, like the bacteria c. botulinum, get energy?
Answer:
It ferments.
Explanation:
This bacteria ferments glycine, proline, phenylaline, and leucine. The remaining energy is obtained by sugar metabolism.
Answer:
It gets energy by the process fermentation.
If a DNA strand contains 26% thymine, what percent adenine will there be in the
same DNA molecule?
Hint: use Chargaff's Rules
24%
27%
26%
23%
Answer:
26%
Explanation:
Adenine and Thymine are pairs. Therefore, they must have the same amount.
It must always equal 100% and base pairs always have the same amount. So in this case Adenine and Thymine would be 26% and Guanine and Cytosine would be 24%.
Test question: If a DNA strand has 10% Guanine how much Adenine would there be?
Answer: G-10, C-10, A-40, T-40= 100%
I hope this helps! :)
What other comparison would you say a cell is like? Explain why
Answer:
What do u exactly mean?
Well actually cells are a lot like cars in some ways like the structure its body provides makes it comparable to a cell wall. You can compare the windshield and windows to plasma membranes because they protect the inside of the car from invaders like insects and dirt.
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What factors might cause a kelp forest to disappear?
Answer: Natural Causes and Human Activities
Explanation:
The factors influencing kelp forest stability are diverse: kelp harvesting; grazing by fishes, sea urchins, and crustaceans; plant competition; storms; sedimentation; and pollution; global warming and the association with rising ocean temperatures.
Answer:
does this help ?
Explanation:
a large patch of warm water developed off the coast, creating a catalyst that has further changed this underwater environment. The persistent warmer sea temperatures stress the kelp forests to the point that growth and reproduction have slowed dramatically and caused damage to remaining fronds and tissue.
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:
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..
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
-3. Proteins are made where in the cell?
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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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 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:
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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/cm³State on way how forests could be restored
Answer: reduce agriculture
Explanation:
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.
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.
These cells have been found at the end of a pathway lined with the above cells and help absorb oxygen.
What type of organ do you expect to have tissues made up of the above cells and why?
Answer:Human body tissue makes up organs and other body parts. There are four main types of tissue: muscle, epithelial, connective and nervous. Each is made of specialized cells that are grouped together according to structure and function. Muscle is found throughout the body and even includes organs such as the heart.
As we saw above, every organ is made up of two or more tissues, groups of ... Image credit: modified from Types of tissues:
Explanation:
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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:
How many calories are in a mg of sodium?? Please help i’m bout to end my life
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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Describe a food web that includes a blue whale, krill, tuna and a shark. Add other organisms to make it work.
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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. 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
how do you clear your notifications.
which of the following organelles is most likely to affect apoptosis?
Answer:
mitochondria
Explanation:
Answer:
mitochondria
Explanation:
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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Which of the following correctly describes the image below? (5 points)
a
Protein Molecule
b
RNA Molecule
c
Amino Acid
d
Carboxylic Acid
❗️❗️How can you tell the limit of the carrying capacity on a
on a graph?
pls help
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
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: