What variables can affect the number of fish in a lake
Answer:
well it could be the pollutoin or the amount of fish or predoators
Explanation:
also dont go word for word this is just a basais of things you could do
Answer:
How much people fish in the lake, how cold the weather gets, if there are any dangerous compounds added to the water, how many eggs the fish lay that spring...
Explanation:
How long can you leave an Abyssinian cat alone?
How did the development of the cell theory lay the foundation for the current advancements in stem cell research?
All organisms depend on stem cells for their survival. As an outcome, stem cells may be a requirement for the evolution of specific characteristics in organisms that include regeneration, multicellularity and coloniality.
What is stem cell theory?The stem cell theory of ageing proposes that the ageing process is the result of the inability of different types of stem cells to continue to replenish the tissues of an organism with functional differentiated cells capable of maintaining that tissue's original function.
Thus, stem cells may be a prerequisite for the evolution of specific characteristics in organisms that include regeneration, multicellularity and coloniality.
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A 20.0 g sample of metal with a specific heat of 1.50 J/(gºC) raised its temperature from 25 ºC to 100 ºC. How much heat in J was absorbed by the sample of metal?
a.)2,250 J
b.)5,276 J
c.)0.177 J
d.)750 J
Answer:
A
Explanation:
What other ways can organisms be classified? (20 points!!)
Answer:
Here:
Explanation:
1. Physiological Structures: grouped organisms by their modes of transportation: swimming, walking, flying, etc.
2. Embryology and Ontogeny: development and changes that an embryo goes through as it changes from the fertilized egg to the organisms’ mature form.
3. Phylogenetic Relationships: history of a species or group of related species.
How are extrusive rocks formed?
Answer:
the rocks that form at erupting volcanoes and oozing fissures.
Explanation:
PLZZ HELP THIS DUE TODAY AND I STRESS OUT PLZZ HELP ME ONLY GIVE ME THE CORRECT ANSWER PLZZZ this due today !!!!HELPP
9. Doctors tested a patient to find out what molecules were in her cells. Her cells contained normal levels of oxygen molecules, low levels of amino acid molecules, and low levels of glucose molecules. Will this patient be able to exercise normally?
A. Yes, as long as her cells have enough oxygen, her body will be able to exercise.
B. No, her cells need glucose to react with oxygen to release enough energy to exercise.
C. No, her cells need amino acids to react with oxygen to release enough energy to exercise.
D. No, her cells need glucose to react with amino acids to release enough energy to exercise.
10. Asthma is a condition in which it can be very hard for a person to breathe in enough air. Would it also be difficult for someone with asthma to exercise?
A. No, as long as the person is getting enough sleep, he will make enough energy to exercise.
B. No, as long as the person's cells are getting different types of molecules from food, he can still exercise.
C. No, the person's cells may not have everything they need, but his body can still exercise normally.
D. Yes, it will be difficult for a person with asthma to exercise because his cells need molecules from air.
11. Jamal ate a meal of rice before seeing his doctor. Rice is made of mostly starch molecules. Jamal has been feeling tired a lot, so his doctor gave him a test that found that Jamal’s cells contained normal levels of oxygen and low levels of glucose. Does this explain why Jamal has been feeling tired?
A. Yes, Jamal's respiratory system is working, but his digestive system is not turning the oxygen into glucose.
B. Yes, Jamal's respiratory system is working, but his digestive system is not breaking down starch molecules into glucose for his cells.
C. Yes, Jamal's digestive system is working, but his respiratory system has too much oxygen, so his body stopped making energy.
D. No, something else must be wrong with Jamal because his cells have all the molecules they need.
12. A patient has been eating healthy foods, but her respiratory system is not working as well as it usually does. Can this patient still exercise normally?
A. Yes, her body can get everything it needs for energy from molecules in food.
B. No, her respiratory system does not have enough oxygen to combine together to release energy.
C. No, her cells do not have enough oxygen to react with glucose and release energy.
D. No, her cells do not have enough oxygen to react with proteins to release energy.
Answer:
b
Explanation:
Answer:9.b
10.d
11.b
12.b
Explanation:
How are taxonomic keys used? (20 points!!)
Taxonomic key is a type of device that is mainly used by biologist to identify unknown organisms.
Explanation:
A taxonomic key is one of the powerful key use by scientists to identify unknown organisms. Keys are constructed in such a way that it is presented with series of choices.
Organisms can be classified on the basis of kingdom.
There are seven ways by which we can classify organisms. They are as follows classes , phylum, order, kingdom,genus, families and species.
Branching tree diagram is mainly used to show the relationship between different types of organisms in the Earth.
A branching diagram is that diagram which is used to show different species of organisms based on specific characteristics as well as history on evolution.
Answer:
A taxonomic key is a simple tool used to identify a specific object.
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Please match the parts of the microscope with their function. Put the letter next to the part of the microscope that fits the description.
1. D
2. H
3. A
4. F
5. J
6. I
7. G
8. C
9. B
10. E
11. K
Correct match the parts of the microscope with their function -
1. Eyepiece - D 2. Base - H 3. Nosepiece - A 4. Stage - F 5. Coarse adjustment knob - J 6. DIaphragm - I 7. Stage clips - G 8. Fine adjustment knob - C 9. Objective lens - B 10. Arm - E 11. Light source - KParts of the microscope are:
Eyepiece or ocular - the part which is used to look through at the top of the microscope. Arm - it is used to carry a microscope. Objective lens - the primary optical lenses on a microscope ranging from 4x to 100x magnification power. Nosepiece - the part of a microscope to which the objective lenses are attached.Fine adjustment knob - A slow but precise control used to fine focus the image when viewing at the higher magnifications. Coarse adjustment knob - The coarse adjustment knob located on the arm of the microscope moves the stage up and down to bring the specimen into focus. Stage -This is a ledge where the specimen to be observed is placed. Stage clips - Clips on the stage that hold that is a glass slide on which the specimen has been mounted. Light source - This is the light source for a microscope usually located in the base of the microscope. diaphragm - This is a flexible structure that controls the amount of light reaching the specimen and is located above the condenser and below the stage. Base -This is the foot of the microscope and supports the whole frame of the microscope.Learn more:
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Which of the following is NOT true of mutations?
a) They can take place in body cells or in reproductive cells.
b) They often lead to beneficial variations.
c) They can be caused by X rays.
d) They involve changes to genetic information.
Do you feel like reading today -3-
A student found a grasshopper in their backyard and wanted to take it to school to show the teacher the next day. The student put the grasshopper in a sealed container overnight to keep it from hopping away. When the student opened the container the following day, the grasshopper was dead. Which best describes what organelle in the grasshopper’s cells was unable to perform properly for the grasshopper to stay alive as a result of being kept in a sealed container overnight?
A.The mitochondria were unable to undergo cellular respiration and could not produce energy for the cells to function.
B.The lysosomes were unable to remove waste from the cells
C.The cell membrane was unable to allow substances to enter and exit the cells.
D.The nucleus was unable to provide instructions for the other organelles in the cells.
Which analogy best describes the process of diffusion?
A. Water is pumped out of a well in the ground.
B. Everyone steps out of a building.
C. Some people from a crowded room move into a less crowded room.
D. All of the students in class squeeze around one lunch table.
Answer:
B
Explanation:
Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. ... Molecules move from an area of high concentration to an area of lower concentration until an equilibrium is met.
So people coming out of a building bests describes it.
Physical characteristics of sedimentary, metamorphic, and indigenous rocks?
Warm ocean currents cause major weather events, impacting animals and their survival. Which two main spheres are involved?
Atmosphere and biosphere
Geosphere and biosphere
Hydrosphere and biosphere
Atmosphere and hydrosphere
Answer:
hydrosphere and biosphere
Explanation:
i am 96% sure i'm right
this illustration shows a kind of animal that is a free living organism
which term is the common name of this organism?
A. Amoeba
B. Planarian
C. Fluke
D. Tapeworm
Answer: Planarian
This is the answer i know because i've seen them before
Answer:
b
Explanation:
which choice has eukaryotic animal cells?
lactobacillus
virus
liver
oak
Exposed to sunlight ---> Increased use of CO2 ---> ?
You are studying plants and your teacher has made a flowchart for a leaf. What phrase, if placed in box X, would correctly complete the flowchart above?
A. Increased amount of food production in the leaf because more carbon dioxide will increase the amount of photosynthesis occuring in the leaf.
B. Decreased amount of food production in the leaf because more carbon dioxide will increase the amount of photosynthesis occuring in the leaf.
C. Increased amount of food production in the leaf because more carbon dioxide will decrease the amount of photosynthesis occuring in the leaf
D. Decreased amount of food production in the leaf because more carbon dioxide will decrease the amount of photosynthesis occuring in the leaf.
When the plant is placed under the sunlight and the carbon dioxide, then an increased amount of food production occurs in the leaf because more carbon dioxide will increase the amount of photosynthesis occurring in the leaf, as is present in option A.
What is the role of photosynthesis?Photosynthesis is a process in which the plant needs carbon dioxide, sunlight, and water. When the plant is in normal condition and getting sufficient sunlight and carbon dioxide, the rate of photosynthesis increases, and the glucose synthesis increases too.
Hence, when the plant is placed under the sunlight and the carbon dioxide, an increased amount of food production occurs in the leaf because more carbon dioxide will increase the amount of photosynthesis occurring in the leaf, as is present in option A.
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The models below illustrate cells that have been placed in solutions containing salt. The cell membrane is permeable to water, but not permeable to salt. In which model would water leave the cell, causing the cell shrink?
Cell Model A: INside-3% salt 96% water OUTside-1% salt 99% water
Cell Model B: INside 3% salt 97% water OUTside 3% salt 97% water
Cell Model C: INside 1% salt 99% water OUTside 3% salt 97% water
Cell Model D: INside 99% salt 1% water OUTside 97% salt 3% water
A. Cell b.
B. Cell c.
C. Cell a.
D. Cell d.
While playing basketball, a student scrapes their knee. Which explanation best describes what organelles work together for the skin to heal after being cut?
A. The cell membrane controls the amount of energy released so that the lysosomes can give the command for cellular reproduction.
B. The mitochondria provides the energy for the cell membrane to control the process of cellular reproduction.
C. The chloroplasts provide nutrients for the nucleus to give instructions to the other organelles so that cellular reproduction can occur.
D. The nucleus gives instructions to begin cellular reproduction and duplicates the DNA, and the mitochondria makes the energy necessary for the process.
The explanation best describes organelles work together for the skin to heal after being cut is the nucleus gives instructions to begin cellular reproduction and duplicates the DNA, and the mitochondria makes the energy necessary for the process. Thus, option D is correct.
What is RNA and DNA?Ribonucleic acid (abbreviated RNA) is a nucleic acid present in all living cells that has structural similarities to DNA. Unlike DNA, however, RNA is most often single-stranded.
An RNA molecule has a backbone made of alternating phosphate groups and the sugar ribose, rather than the deoxyribose found in DNA.
Attached to each sugar is one of four bases: adenine (A), uracil (U), cytosine (C) or guanine (G). Friedrich miescher discovered DNA in the year of 1860.
In our body DNA is found in the nucleus of the cell and it is known as nuclear DNA. The shape of DNA is double helical structure.
Therefore, the explanation best describes organelles work together for the skin to heal after being cut is the nucleus gives instructions to begin cellular reproduction and duplicates the DNA, and the mitochondria makes the energy necessary for the process. Thus, option D is correct.
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How does a plant cell's structures, vacuoles, cell walls and chloroplasts to support the plant in obtaining and storing sunlight and water?
The DNA is organized in bundles called _______.
Answer:
Chromosomes
Explanation:
Hope this helps
Explain what selective permeability is and how this relates to the cell membrane? pls help
Answer:
Well selectively permeable means that the membrane selects what goes in and out of the cell
Explanation:
What is a shared derived characteristic? What is an example of this type of characteristic? (20 points!!)
Answer:
Shared derived characters can be used to group organisms into classes.
Explanation:
For example, amphibians, turtles, lizards, snakes, crocodiles, birds and mammals all have, or historically had, four limbs.
Answer: A shared derived character is a characteristic or trait that two lineages share, which has evolved leading up to their clade. For example, amphibians, turtles, lizards, snakes, crocodiles, birds and mammals all have, or historically had, four limbs.
Explanation:
You have been exposed to the flu virus, which is easily able to enter a cell because it disguises itself and is not recognized by the cell as an invader. Which of the following describes how the organelles of a cell might work together in a way that helps the virus?
A. Because the virus disguises itself, the cell membrane allows it to enter the cell, the mitochondria provides energy, and the nucleus directs the organelles to make the parts the virus needs.
B. Because the virus disguises itself, the cell membrane allows it to enter the cell, the mitochondria provides food, and the nucleus provides the energy to help the virus.
C. Because the virus disguises itself, the cell wall allows it to enter the cell, the mitochondria provides energy, and the nucleus directs the organelles to make the parts the virus needs.
D. Because the virus disguises itself, the cell wall allows it to enter the cell, the mitochondria and the chloroplast work together to provide energy to help the virus.
Answer:c
Explanation:
Hey can someone help me this is due today thank you! :D
Some organisms are made of only one cell. Other organisms are made of many cells.
Question: What are some examples of each?
Answer:
Many cells: humans
Single cell: Bacteria known as protozoa
Explanation:
Answer:
The human body contains one cell but the amoebas and archaea contain's many cells
hope it helps
Explanation:
When studying living organisms, why is it important to start with the cell first?
Answer:
To identity the type of cell.
Explanation:
Um I dunno
Organelles in cells work together to contribute to the function of a cell as a system. Which of the following provides the best explanation of organelles working together to make food through photosynthesis?
A. The cell membrane takes in water and carbon dioxide, and mitochondria absorb sunlight energy.
B. Chloroplasts absorb sunlight energy, and the cell membrane takes in water and carbon dioxide.
C. The cell membrane takes in water and oxygen, and chloroplasts absorb sunlight energy.
D. Mitochondria absorb sunlight energy, and vacuoles provide water.
Answer:
B
Explanation:
Chloroplasts work to convert light energy of the Sun into sugars that can be used ... In the process of photosynthesis, plants create sugars and release oxygen
Biological membranes have three primary functions: (1) they keep toxic substances out of the cell; (2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles and between the cell and the outside environment; and (3) they separate vital but incompatible metabolic processes conducted within organelles.
Compare and contrast bacterial cells and human cells.
Answer:
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Which kind of soil do temperate climate areas usually have?
-Soil containing little to no organic material
-Soil rich in nutrients
-Soil with a layer mostly composed of clay
-Soil consisting primarily of tiny rock particles
Answer:
The second one will be your answer
Explanation:
When you kick a soccer ball, you are using _____ to put the ball in motion. Question 1 options: A) force B) gravity C) chemistry
i think its A but just to be sure. plz help meee
Answer: A
Explanation:
Gravity is when you drop something, but in this case you aren’t dropping the ball. It definitely isn’t chemistry because you aren’t changing molecules or anything so that only leaves A which is the most reasonable answer anyways.