..
Explanation:
your lucky you did have a online lessons early
Answer:
All living things respond to external stimuli .Explain All living beings respond to stimuli because they all have some or other form of control and coordination system in their bodies. This system which may be nervous system or a hormonal system which is responsible for responding to the stimuli.Explanation:
I hope it helps ❤
Which of the following describes a negative feedback loop?
A. When the heart rate is too high, the body releases hormones that continually increase the heart rate higher.
B. When a pregnant woman is in labor, the body releases hormones that increase the intensity of contractions, which then increases the secretion of the same hormones.
C. When blood sugar concentration is above normal, the endocrine system releases hormones that lower the blood sugar concentration until it reaches a normal level, and the release of the hormones slows.
D. When a person is jogging, the body releases hormones that continually decrease the rate of oxygen supply to the legs.
ANSWER is A
When blood sugar concentration is too low, the endocrine system secretes hormones that increase blood sugar concentration to a normal level.
Explanation:
jake tested the effect of purple light on the growth of eggplants
Find the independent & dependent variables.
Answer:
Independent variable : color of light. 2. Dependent variable : height/growth of plant. 3. Independent variable : color of light. 2. Dependent variable : height/growth of plant. 3.
Explanation:
Answer:
Independent variable : color of light. 2. Dependent variable : height/growth of plant. 3. Independent variable : color of light. 2. Dependent variable : height/growth of plant. 3.
Explanation:
3.4.3 Lab: Why are cells so small?
Answer: The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume. ... That is why cells are so small.
Explanation: because they can absorb nutrients much more efficiently. Because they are smaller they can efficiently absorb enough food. ... When a cell doubles in size the volume increases much more then the surface area, which is why large cells cannot receive enough food efficiently for their volume. Cells are small because they are more efficient as smaller entities. Information within small cells is transmitted more quickly and efficiently than within larger cells. ... Thus a higher cell surface area-to-volume ratio, i.e., smaller cell size, is desired for most efficient cellular activity.
The cells are so small because their small size allows them to take in food and get rid of the waste.
The cells are the basic structural and functional unit of all organisms on earth except the Viruses. The size of the cell is so little it allows the organism to maximize the ration of surface area to volume. Smaller cells are expected to have greater ratio which promotes more molecules as well as ions to move across the plasma membrane.The small size of the cell facilitate to get the nutrients inside the cell and waste outside the cell quickly. Hence, small size of cell facilitates to get food inside and get rid of waste.Learn more about cell:
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3. A house has several systems, such as the electrical system, plumbing system, and
heating and cooling system. In what ways are the systems of a house similar to
human body systems?
how do buffers work in the human body?
Answer: They can help prevent a deadly change in blood pH. They can help keep blood below pH 7.0. They can help keep blood at a pH of 7.0.
Explanation:
What can you observe with the cartoon? What is your own interpretation of it?
Answer:
i think that: the volcanos are talking to eachother as if they are humans and they do not understand that the reason his neighbour "blew up" (errupted) is because they are volcanos
What is the independent variable?
What is the dependent variable?
Allopatric speciation is most likely to occur when a ______ population is separated from the ______ population.
HELP PLEASEEE
which type of protein is a new drug most likely to be?
a. An actin fiber
b. A myosin fiber
c. An enzyme
d. A histamine
DUE IN 10 MINUTES PLZ HELP
Explain how environmental changes affect the sickle cell trait over time in your population.
Answer:
your body will react
Explanation:
I have the Sickle cell trait....
uh anyways- ( HOPE THIS HELPS).
1. Which of the following describes the amount of organic material that is available for transfer to the next trophic level after subtracting material used for respiration?
-Gross Primary productivity
-Biomass
-Net Primary productivity
0r
-Primary productivity
2. Suppose a plant is eaten by a mouse, the mouse is consumed by a snake, and the snake is in turn consumed by a hawk. What could be assumed about the level of available organic matter in the mouse versus the plant?
-There will be less organic matter available.
-There will be more organic matter available.
-Organic matter does not transfer between the plant and the mouse.
0r
-They both have the same amount of organic matter.
3. How does biomass change from lower to higher trophic levels?
-It fluctuates.
-It increases.
-It decreases.
0r
-It stays the same.
4. The incomplete burning of _____ in gasoline is known to create black carbon and contribute to global warming.
-ethanol
-methane
-carbon
0r
-carbon dioxide
5. Why are there less secondary consumers in an ecosystem than producers?
-Around 90% of energy from one trophic level to the next is available.
-There is less land to use for habitat after the producers grow.
-More tertiary consumers will eat secondary consumers over producers.
0r
-There isn’t enough energy available to support more secondary consumers.
Net primary productivity is the amount of organic material that is available for transfer to the next trophic level after subtracting material used for respiration.
When a plant is eaten by a mouse, the mouse is consumed by a snake, and the snake is in turn consumed by a hawk. In this case, there will be less organic matter available.
Biomass change from lower to higher trophic levels by decreasing.
The incomplete burning of ethanol in gasoline is known to create black carbon and contribute to global warming.
There is less secondary consumers in an ecosystem than producers because there isn’t enough energy available to support more secondary consumers.
It should be noted that global warming brings about the increase in the temperature around the world.
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Which of the following accurately describes plasma?
a. It includes all the blood except the red blood cells.
b. It makes up 30% of whole blood.
c. It is the liquid portion of blood that includes the clotting factors.
d. It is the liquid portion of blood including the formed elements.
e. It contains the blood antigens that determine blood type.
Answer:
The correct answer is - option C.
Explanation:
Plasma is the liquid portion of the blood that carries water, salts, and enzymes in it and comprise almost 55% of the total blood volume. Other 45% of blood contains RBC, WBC, and platelets.
It is a yellow liquid that contains a clotting factor that helps in clotting blood if any injury occurs. Antigens are present on the RBCs not in the blood plasma that determines blood type.
Daphne identifies the entire sequence of nucleotides in a gene. Based on this information and the genetic code, she predicts the sequence of amino acids in the protein that the gene codes for. What is the MOST LIKELY reason that Daphne’s prediction would be incorrect?
The gene codes for a carbohydrate, and not a protein.
A mutation changes the genetic code that the cell uses.
The cell removes introns from pre-mRNA.
The cell removes introns from DNA.
Answer:
The cell removes introns from pre-MRNA
Explanation:
1. What is an operon?
a. The binding site for a repressor PRO.
b. Any group of genes responsible for the metabolism of lactose in a prokaryotes or eukaryotes.
c. A cluster of genes under the control of a promoter.
d. A regulatory gene.
Answer:
The answer is D
Explanation:
Hemophilia is a recessive sex-linked trait. A non-hemophiliac man and woman marry and
have a daughter who is a hemophiliac. The father of this child suspects infidelity and is
considering a divorce. Does he have sufficient evidence of infidelity? Explain.
The father does not have sufficient evidence of infidelity as the parent's genotype is not mentioned which could have the recessive trait of hemophilia being inherited to the daughter.
What is hemophilia?Hemophilia is a disorder which is rare which results when the blood does not clot in it's usual way as it does not have sufficient blood-clotting factors .A person suffering from hemophilia can bleed for a longer period of time resulting in blood loss.
It is almost always that hemophilia occurs genetically . Treatment of hemophilia include replacement of the specific blood clotting factor that is reduced. Symptoms of hemophilia vary from person to person depending on the level of the clotting factors.
Signs and symptoms include excessive bleeding ,large or deep bruises, pain or swelling in joints ,nosebleeds,etc.
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How do the hormones of the endocrine system act as a feedback mechanism for the menstrual cycle?
In positive feedback, rising levels of hormones feedback to increase hormone production. During most of the menstrual cycle, estrogen and progesterone provide negative feedback to the hypothalamus and pituitary gland. This keeps their levels more or less constant.
In negative feedback, rising levels of hormones feedback to the hypothalamus and pituitary gland to decrease the production of the hormones. In positive feedback, rising levels of hormones feedback to increase hormone production. During most of the menstrual cycle, estrogen and progesterone provide negative feedback to the hypothalamus and pituitary gland. This keeps their levels more or less constant. During days 12–14, however, estrogen provides positive feedback to the hypothalamus and pituitary gland. This causes a rapid rise in the production of estrogen by the ovaries and leads to ovulation.
6. How can an introduced species affect an ecosystem?
Answer:
When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. It can breed and spread quickly, taking over an area. Invasive species can change the food web in an ecosystem by destroying or replacing native food sources.
Explanation:
I majored in Biology
3. How does changing the number of neutrons affect an atom?
Answer:
The change of number of neutrons does not affect the charge of the atom. All it will affect is your average atomic mass which is the sum of protons and neutrons.
Explanation: Hope this can help! ^^
Answer:
It will change the isotopes.
plz help me i beg of you!???
Answer:
Pretty sure it's D, because the birds beak evolves to crush those grains as a result of certain food available in their habitat, although it does not say "diet" as an option so D is your best guess.
Explanation:
Answer quickly please
How do roundworms differ from earthworms?
A. They have a cylindrical body.
B. They have a body that is tapered at both ends.
C. They reproduce sexually.
D. They are not divided into segments.
Answer:
Key difference: Earthworms, Tapeworms and Roundworms are long and cylindrical shaped worms. The basic difference between them is that Earthworms are segmented invertebrates belonging to the phylum Annelida, Tapeworms are flatworms belonging to the phylum Platyhelminthes, and Roundworms are parasitic worms belonging to the phylum Nematoda.
Explanation:
So: A?
Answer:
A
Explanation:
They have a cylindrical body.
Have a great day and good luck
In your lab group, you are investigating the properties of unknown types of matter. Your teacher gives you a "detective's kit
consisting of: vinegar (an acid), pH strips, and water. She asks you to design experiments to determine the chemical properties of the
unknowns. Select ALL of the experiments you might perform to observe chemical properties.
A)
measuring the pH
B)
measuring the mass
C)
measuring the density
D)
measuring the boiling point
E)
checking for reactivity with vinegar
Answer:
A: measuring the pH
E:checking for reactivity with vinegar
Explanation: I don't have one
The chemical property of the unknown substance can be measured by checking for reactivity with vinegar.
The chemical properties of a substance are those properties of a substance that we can observe by allowing the substance to be changed via a chemical reaction. In other words, chemical properties are observed by passing the substance through a chemical reaction.
Hence, the experiment that you will need to perform in order to determine the chemical properties of the unknown substance is checking for reactivity with vinegar.
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Answer: the secondary response to Antigen A is greater because the lymphocytes remember the antigen
Complex food molecules that are consumed by organisms must be broken down in order to be used by cells to support growth or release energy.
True
False
Answer:True
Explanation:
The complex molecules are broken down by the digestive system. If the molecules were not to be broken down they would block the system
Answer:
TRue
Explanation:
how is cancer cell division different from regular cell division
why it is important to understand this concept for the benefit of understanding other ideas in science/biology (1-2 sentences).
Answer:
the objective is to help you know more about biology as a science, how biologist and other scientist do their work, personal traits that scientist find helpful in their work, and the benefits that people derived from biology and biotechnology specially in gaining new knowledge in understanding the concepts of science/biology.
Explanation:
I don't know what concept does the question asks because it wastn't stated but I answered anyway
what are the similarities and differences between carrier proteins and channel proteins
What are the three goals of integrated pest management (IPM)?
A) to reduce the use of insecticides, increase consumer costs, and
conserve water
B) to reduce the use of insecticides, increase farmer costs, and conserve
water
C)to reduce the use of artificial pesticides, reduce costs, and control pests
D) to reduce the use of artificial pesticides, reduce costs, and increase
salinization
Please select the best answer from the choices provided
Ο Α
B
The correct answer is C. To reduce the use of artificial pesticides, reduce costs, and control pests.
Explanation
Integrated pest management (IPM) is a method that integrates different practices and scientific principles to make adequate management with pests. This method considers knowledge about the habits, life cycle, needs, and aversions of the pest, reducing the use of toxic methods and implementing less toxic methods, monitoring pest activity and adjusting methods over time, tolerating harmless pests, setting a threshold to decide when it is time to act, among others as its main principles. Therefore, the correct answer is C. To reduce the use of artificial pesticides, reduce costs, and control pests.
The picture shows respiratory epithelium in the lungs. The cilia, or fingerlike projections are MOST LIKELY there to
A)
move liquid.
B)
catch debris.
C)
secrete mucus.
D)
transmit impulses
Answer:
B. catch debris in the lungs
Choose all the right answers. Which items are common features of most mammals? produce milk come in all sizes fertilized egg develops inside the body have fins eggs laid outside of body have scales some mammals live in water all have hair or fur
Answer: Some mammals live in water all have hair or fur.
Explanation:
3 examples of relationships between geologic and biologic events
Answer: Volcanic eruptions, earthquakes and tsunamis are all dramatic examples of geological events.
Explanation: