1. How did the introduction of Zebra Mussels change the Hudson River Ecosystem?
Answer:
The zebra mussel invasion has had profound effects on the Hudson River ecosystem. The food web changes that the mussel has caused compare in magnitude to disturbances in other aquatic ecosystems caused by toxins, nutrient pollution, or acid rain.In spite of their small size (often no bigger than a penny) zebra mussels cause far-reaching damage to water structures and native ecosystems. ... They also negatively impact aquatic ecosystems by harming native organisms. In huge numbers, they out-compete other filter feeders, starving them.
Explanation:
Describe how the skin cells, neurons, muscle cells, and blood cells you have observed relate to the functions of skin, nerve, muscle, and blood tissue.
Answer:
The form makes the function, this saying is named by many scientists, and they were the ones who made a relationship with the physiology of the organ or tissue and the shape of the cells that make it up.
Explanation:
In the case of neurons, they have extensions to spread and transmit signals, epithelial cells form many layers and have the ability to shed, that is why their main function is the body's innate protective barrier.
Red blood cells are double-headed and enucleated, to be made up of proteins that conform to oxygenation and thus diffuse oxygen well throughout the body.
And finally the muscle cells, which are tapered, with internal sarcomeros, similar to an elastic, to be able to carry out effective contractions starting from a certain length.
Explain how the structure of simple squamous epithelium provides its function
Answer:
The cells in simple squamous epithelium have the appearance of thin scales. ... The mesothelium is a simple squamous epithelium that forms the surface layer of the serous membrane that lines body cavities and internal organs. Its primary function is to provide a smooth and protective surface.
Explanation:
The cells in simple squamous epithelium have the appearance of thin scales. ... The mesothelium is a simple squamous epithelium that forms the surface layer of the serous membrane that lines body cavities and internal organs. Its primary function is to provide a smooth and protective surface.
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Answer:
the answer is A
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Is endocytosis a form of active
transport?
A. Yes, because molecules move down the
concentration gradient without using energy.
B. No, it is a form of diffusion.
C. Yes, because it requires energy to move a
molecule against a concentration gradient.
Answer:
A. Yes, because molecules move down the
concentration gradient without using energy.
Explanation:
Active transport is the energy-requiring process of pumping molecules and ions across membranes against a concentration gradient. Both endocytosis and exocytosis are active transport processes.
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Percent nitrogen is found in earths atmosphere
Answer:
78%
Explanation:
Most of the atmosphere is gas, and 21% is oxygen
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Question 17 : Describe the features on this map. Where is it steepest? Explain how you can tell that it is the steepest. Which way is the river flowing and how do you know?
Answer:
It is steepest at point B and the river is flowing to the bottom right or southeast of the map.
Explanation:
We can tell that the map is steepest at point B because the lines that display altitude are closest together. Each line indicates 100 miles gained or lost to the overall altitude of the mountain. With the lines closest together, altitude is gained at the most rapid rate, and is therefore the steepest.
Additionally, we can conclude that the river is flowing southeast also because of altitude. The river runs from 1000 altitude to 500 altitude. Since rivers always run downhill, the river will run from the higher northwest point on this map to the much lower southeast point, and is therefore flowing southeast.
Which of the following rocks most likely resulted from compacting and cementing particles together? A. marble B. sandstone C. slate D. pumice
Answer:
B. sandstone
Explanation:
Answer:
b
Explanation:
1. What is the cell?
Answer: Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. ... Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.
Explanation:
what will happen when the 14 grams of protein in greek yogurt is eating by a person?
Answer:
it go bye bye
Explanation:
because you are it
LD
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12
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Kaya had an organ transplant. She went to the doctor a week later, and the doctor did a blood test. Her lymphocyte count
had increased. She went to the doctor a month later for the same test, and her lymphocyte count was higher. What is the
best explanation as to why her lymphocyte levels were increasing?
O Kaya was given antibiotics to prevent infections.
Kaya's antigens were attacking the tissue.
Kaya was not tissue typed prior to her surgery, and her body is mounting an immune response.
O Kaya took her immunosuppressant drugs weekly, which increased her lymphocyte count.
Answer:
The best explanation for the increased lymphocyte levels in Kaya is that she was not tissue typed prior to her surgery, and her body is mounting an immune response.
Explanation:
When performing an organ transplant, it must be verified whether the organ to be transplanted is compatible -by tissue typing- with the recipient, since it is recognized as a foreign body by the body and can be rejected.
One of the immunological responses to organ rejection is called cell rejection, involving T-helper and cytotoxic lymphocytes.
It is very likely that in Kaya's case the tests have not been performed correctly, and she is experiencing rejection of the organ she received. The progressive increase in lymphocytes may be an indication of this.
The other options are not possible because:
Administering antibiotics should not raise lymphocyte levels. There is no evidence of antigen attack. Immunosuppressant drugs do not increase lymphocyte count.Please help please help please help please help please help please help please help please help please help please help please help please help please help please help
Answer:
Osmosis across the membrane
Explanation:
The diagram shows the movement of water molecules from outside the cell to the inside of the cell. The concentration of water molecules is higher outside of the cell than inside the cell, meaning the water molecules are moving from a high concentration to a low concentration across the semi-permeable membrane, a process called osmosis.
Exocytosis is the movement of molecules from the inside of the cell to the outside via a vesicle. The vesicle fuses with the plasma membrane and the contained substances are released outside the cell.
Active transport is the movement of molecules against their concentration gradient and requires energy.
Facilitated diffusion is used by molecules that cannot freely cross the plasma membrane (e.g. large polar molecules and ions)
Answer:
Osmosis across the membrane
Explanation:
which structure is found mostly in green plants
A. Lysosome
B. Mitochondria
C. Chloroplast
D. cytoplasm
Answer:
C
Explanation:
cuz it is
Answer:
Chloroplast
Explanation:
plzz plzz plzz help I will give you 10 points to whoever answers this! Which type of heat transfer takes place through electromagnetic waves?
O Conduction
OConvection
ORadiation
OThermal
Answer:
radiation
Explanation:
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Answer:
c) Radiation
Explanation:
Radiation is the transfer of heat energy that takes place through electromagnetic radiation. Hence, option (c) is the answer.
How do Bactaria spread?
Explanation:
Bacteria or viruses can be passed on by touching or shaking hands with another person. Touching food with dirty hands will also allow viruses or bacteria from the intestine to spread. Bacteria or viruses can be passed on by touching or shaking hands with another person.
Answer:
bacteria are spread in hand to hand touch and spread the virus
The role of the cell membrane is most like the job of which person?
Answer:
The officer that allows people in and out of the crime scene.
Explanation:
The cell membrane chooses what comes in and out of the cell, therefore the officer would be most similar to the job of the cell membrane.
Answer:
It has a job similar to a police officer who allows select people to enter and leave a crime scene.
Explanation:
The primary purpose of the cell membrane is to preserve the cell from its surroundings. The cell membrane manages the movement of materials in and out of cells and organelles. In this form, it is selectively perforable to ions and organic molecules. It is the same as of police officer or security guard that check the people and allow only a few to enter a specific place.
If all of the ribosomes in a cell disappeared, which of the following will happen?
Answer:
Explanation:
if all of the ribosomes in a cell disappeared than the cell would no longer be able to produce proteins
A unknown element is a gas at room temperature, has 8 valence electrons and 22 neutrons the element is most likely
Answer:
Argon
Explanation:
Argon is a chemical element which is a gas at room temperature, has 8 valence electrons and 22 neutrons. This element belongs to the noble gas elements group.
What is Argon?Noble gas is any of the rare gases that include helium, neon, argon, krypton, xenon, and sometimes radon also and that exhibit great stability and extremely low reaction rates than other elements in the periodic table.
Argon is a chemical element with the symbol Ar and it has an atomic number of 18. It is in the group 18 of the periodic table and it is a noble gas. Argon is the third-most abundant gas in the Earth's atmosphere, at 0.9340 ppmv. It is more than twice as abundant as that of water vapor, 23 times as abundant as carbon dioxide, and more than 500 times as abundant as neon gas. Argon is the most abundant noble gas in the Earth's crust, which comprises about 0.00015% of the crust.
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How do high temperatures
affect enzyme activity?
Answer:
Increased temperatures can cause enzymes to work more quickly, if the temperature gets too high the enzyme stops working.
Explanation:
If the temperature around an enzyme gets too high, the enzyme loses its shape, which is known as denaturation, and ceases to work.
Which type of feedback always strengthens or increases the response of the stimulus?
Answer:
Now, there are two types of each approach, positive and negative. Positive reinforcement is a process that strengthens the likelihood of a particular response by adding a stimulus after the behavior is performed.
Gordon is going for a run through the park, but it is cold outside. The low outside temperature could affect his personal safety.
T
F
Answer:
True
Explanation:
If it is super cold or super hot outside then it could cause some serious health problems.
Heatstroke and hypothermia can be lethal if not dealt with.
Answer:
This is true
Explanation:
It just is
Question 13 of 20
А.
is a break that occurs from repeated stress to a bone over time.
A. compound fracture
B. complex fracture
C. simple fracture
D. stress fracture
Answer:
D) stress fracture
A stress fracture is a break in the bone that develops because of repeated or prolonged forces against the bone. The repeated stress weakens the bone until it finally breaks.
How can there be strong and weak muscle contractions if a single
muscle fiber always contracts to its full extent?
Answer:
As more and larger motors units are activated the force of muscle contraction becomes stronger.
Explanation:
how is the electromagnetic spectrum connected to color, light, and temperature?
Answer:
All objects emit electromagnetic radiation, and the amount of radiation emitted at each wavelength determines the temperature of the object. ... Therefore, you can tell the temperature of a star or galaxy by its color because color is closely related to the wavelength at which its light intensity peaks.
Explanation:
The dorsal body cavity is divided into which two cavities?
the thoracic cavity
the cranial cavity
the vertebral cavity
the pelvic cavity
the dorsal cavity
Answer:
it is subdivided into the cranial cavity
Answer:
The second and third
Explanation:
How woudl a scientist determine the age of a fossilized dinosaur egg?
A
Compare the egg to other fossils discovered in that area.
В.
There is no way to determine the age of fossilized remains.
С.
Use the amount of nitrogen remaining in the egg to calculate the age.
D.
Use the amount of carbon-14 remaining in the egg to calculate the age.
Answer: C
Explanation:
The basis of the nitrogen cycle for consumption by egg-laying ...
C IS ANSWER
Answer:
D
Explanation:
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Answer the following questions.
10) Select the reactants in the light-dependent reaction. Select all that apply.
carbon dioxide
light
nitrogen
oxygen
water (H2O)
11) Identify the products of the light-dependent reaction. Select all that apply.
ATP
oxygen
carbon dioxide
nitrogen
NADPH
light energy
12) The reactants in the dark reaction are: ___, ___, and ___.
ATP
NADPH
carbon dioxide (CO2)
water
light energy
oxygen
13) Identify the product of dark reaction.
O2
sunlight
water
sugar (carbohydrate)
nitrogen
Answer:
its C B A B
Explanation:
Photosynthesis is a series of metabolic reactions by which plants and algae use sunlight, water (H2O), and carbon dioxide (CO2) to produce molecular oxygen (O2) and energy in the form of carbohydrates (glucose).
Photosynthesis has two types of reactions:
The light-dependent reactions. These reactions convert light energy into chemical energy (ATP and NADPH).The light-independent reactions (dark reactions or Calvin Cycle). These reactions fix carbon from CO2 into molecules which are then used to produce sugar (glucose).The reactants in the light-dependent reaction include light and water (H2O).The products of the light-dependent reactions are ATP, oxygen and NADPH.The reactants in the dark reactions are ATP, NADPH and carbon dioxide (CO2).The product of the dark reactions is sugar (carbohydrates).In conclusion, photosynthesis has two types of reactions: light-dependent reactions and light-independent (Calvin Cycle) reactions.
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What do the blue whales and the fish have in common in the food web?
Answer:
Filter feeders
Explanation:
Blue whales use their baleens to filter the water and the krill they catch, and many fish hunt for plankton at the surface of the water while, again, filtering out the water.
Below are some tasks performed in Agriculture, Food, and Natural Resources jobs. Select the tasks that sound interesting or enjoyable to you.
A. planting, tending, and harvesting plants
B. operating heavy equipment like tractors or harvesters
C. treating sick and injured animals
D. performing inspections to ensure that safety
regulations are followed
E. performing experiments in laboratories
F. supervising other workers
Answer:
select anything. its all correct
Explanation:
i just did it
Answer:
select anything. its all correct
Explanation:
Construct an explanation for the outcome of the controlled experiment on window size.
Answer:
Water is a polar molecule because one area is ________________ and another area is ______________________.
Explanation: