pls help i’m taking my exam!!
Scientific laws are____
explanations offered of
specific relationships
not applicable in all situations
non observable phenomenon
descriptions of specific relationships
Answer:not applicable in all situations.
Explanation:I checked it
In the laboratory, yeast cells are usually grown at a temperature of 25oC. A scientist wanted to determine if yeast cells would reproduce faster or slower when the temperature was dropped to 15oC. The same number of yeast cells were placed in the same medium with the same amount of nutrients. One sample was kept at 25oC and the other one was kept at 15oC. The number of yeast cells was counted every hour for an eighteen hour period.
Answer:
This question is incomplete, however, it is asking to identify the following variables:
Independent variable: Temperature
Dependent variable: Number of yeast cells
Constants: same amount of nutrients, same number of yeast cells, same medium
Explanation:
- Independent variable is the variable that the experimenter changes or manipulates in order to bring about a measurable effect. In this experiment, the TEMPERATURE at which the yeast are kept is the independent variable.
- Dependent variable is the variable that responds to the changes made to the independent variable. It is the variable that is measured by the experimenter in the experiment. In this case, The NUMBER OF YEAST CELLS was counted, hence, it is the dependent variable.
- Constants are variables that are kept unchanged or same for all groups by the experimenter in order not to influence the experiment's outcome. In this case, the CONSTANTS are: same amount of nutrients, same number of yeast cells, same medium etc.
The heartbeat rate of an athlete during resting is lower than a non-athlete.
Explain why. [ 2 marks ]
Answer: The heart muscle of conditioned athletes enlarges and strengthens.
Increased cardiovascular fitness causes real physical changes in the structure of the heart. The muscles in the heart wall thicken, and the heart pumps more blood with each beat. That increased efficiency means an athlete's resting heart rate falls to a level that could indicate trouble in a nonathlete. Many athletes don't realize that high levels of conditioning also cause heart symptoms that doctors might mistake for serious problems.
8. What phase of mitosis is the cell pictured below in? Explain how you know that.
Answer:
Anaphase.
Explanation:
We can see that the separated sister chromatids are being pulled by the cell's centrosomes (microtubules) from both poles of the cell.
if a blue eyed offspring is formed from black eyes parents, what type of character is the blue eye dominant or recessive? expalin with the help of a chart
Answer:
Blue Eyes Are: Recessive
Explanation:
The brown eye form of the eye colour gene (or allele) is dominant, whereas the blue eye allele is recessive. If both parents have brown eyes yet carry the allele for blue eyes, a quarter of the children will have blue eyes, and three quarters will have brown eyes. I hope this helps :) Good luck on your assignment!!!
Which of the following describes Mendel's law of segregation?
During DNA replication, the alleles separate into haploid daughter cells
Alleles of a trait can never be separated from each other.
During meiosis, the two alleles for a trait separate into different gametes
During meiosis, two alleles that were separated come back together
which molecules are not able to permeate the cell membrane
Answer:
Small uncharged polar molecules, such as H2O, also can diffuse through membranes, but larger uncharged polar molecules, such as glucose, cannot. Charged molecules, such as ions, are unable to diffuse through a phospholipid bilayer regardless of size; even H+ ions cannot cross a lipid bilayer by free diffusion.
Explanation:
4 ( 3x+10y=54 and x=y+5 )
Answer:
x−y=9 , x+y=6
4x+4y=1
, 6x−y=1
x2−y=2
, 2x−y=−1
Explanation:
Five students get sick with a cold after a weekend field trip to the aquarium with their classmates. Which best explains why these students became sick?
A contact with an infected fish
B. contact with an infected person
C. contact with contaminated food
D contact with a contaminated water
Answer:
The answers is B
Explanation:
I just took a test that had this question on it.
B. contact with an infected person
Transmission occurs when an infected person interacts or exchanges bodily fluids with another person. This can happen before the infected individual even realizes they are sick.
After a weekend field trip to the aquarium with their classmates, five pupils catch a cold. Because they may have come into contact with an infectious person, students became ill. Students became sick as a result of B. contact with an infected person
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 now that you know the bacteria in each tank drag the tanks to put them in the correct order
Answer:
1st ammonia nitrifying
2nd nitrite nitrifying
3rd denitrifying
Explanation:
What does a number in front of a molecular formula stand for?
Answer:
The small number behind each element symbol designates the number of atoms of each element in a chemical formula. If there is no number, it is assumed there is only one of those elements. A large number in front of a compound designates how many units there are of that compound.
What would happen to a cell if placed in each of the following solutions:
a. Isotonic solution:
b. Hypotonic solution:
c. Hypertonic solution:
Answer:
Isotonic: there would be no net flow of water, the cell will stay stable
Hypotonic: the cell will fill up with water and burst
Hypertonic: The cell will shrink because it loses water
Explanation:
(Giving brainliest!!)
Explain why the sun appears to be the brightest star in the sky. Relate your explanation with an example, such as streetlights
Answer:
when you look a streetlight from far it will be some how not bright. the other stars are far from planet earth . but the sun is near
Explanation:
HELP!!!!!!!!!!!!!! And go check out my other questions
Can you list some facts about Food webs.
Answer:
A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass.
Explanation: A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem.
10. A mutation in which types of cells would only affect the organism and not future generations?
Answer:
Somatic mutations are mutations that occur in body cells, that is the cells that do not make gametes. These mutations are not passed on to further generations; for example, if a mutation that changes a gene in a skin cell would not affect your children because skin cells don't produce gametes.
Explanation:
Answer:
Explanation:
Explanation; Somatic mutations are mutations that occur in body cells, that is the cells that do not make gametes. These mutations are not passed on to further generations; for example, if a mutation that changes a gene in a skin cell would not affect your children because skin cells don't produce gametes.
define magnification and cisternae?
Answer:
Magnification In general terms, it can be said that how big or small the image appears with respect to the object is called magnification of the object.
Explanation:
It is represented as the ratio of the height of the image to the ratio of the height of the object. Magnification is denoted as the letter 'm'.
Magnification is the process of enlarging the apparent size, not physical size, of something. This enlargement is quantified by a calculated number also called "magnification".
A cisterna refers to a flattened membrane disk that makes up the Golgi apparatus. A typical Golgi has multiple stacks of anywhere from 3 to 7 cisternae stacked upon each other like dinner plates.The cisternae also carry structural proteins important for their maintenance as flattened membranes and their stacking upon each other.
Help!! does anyone know the answer??
Answer:
i think its osmosis
Explanation:
Please help me it’s due today , there’s number 10 also
Answer:
1. Chloroplast
2. Photosynthesis
3. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
4. Sunlight
5. Glucose
6. Oxygen
7. Carbon Dioxide
8. Water
9. Energy
10. Mitochondrion
11. Cellular Respiration
12. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
Answer:
1. Chloroplast
2.photosynthesis
3. 6 CO₂ (carbon dioxide) +12 H₂O (water) + light -->C6H12O6 (glucose/sugar) +6 O₂ (carbon dioxide) + 6 H₂O (water)
4. Light
5 and 6) Glucose (C₆H₁₂O₆) and O₂
7 and 8) CO₂ and Water (H₂O)
9) energy (ATP)
10) Mitochondria
11) Cellular respiration
12) I think you need the equation as well:
Explanation: C₆H₁₂O₆ (glucose) + 6O₂ (oxygen) --> 6CO₂ (Carbon Dioxide) + 6 H₂O (water) + ATP (energy)
1. Chloroplasts have thylokoids or stacked membranes like it has.
2. Photosynthesis is the process of converting light into usable energy.
3. That is the equation of photosynthesis. Their are different ways of writing this for example: 6 CO₂ + 6H₂O + light -->C₆H₁₂O₆ + 6 O₂ which is balancing the water. Check to see what your teacher used in the book/notes.
4. Light is required for photosynthesis and the sun is providing it.
5 and 6) The mitochondria uses both of these in its processes that were first made in photosynthesis.
7 and 8) Both are created by mitochondria and are used in chloroplasts.
9) Energy is produced in the mitochondria with help from the Chloroplast.
10) It is usually depicted with those lines in it.
11) That is the process's name.
12) This is the equation of cellular respiration.
Which statement best describes a property of water?
A. Liquid water holds its shape
B. Water changes to a gas as it boils
C. Ice becomes a liquid when it freezes
D. Solid ice changes shape with its container
So imma gonna go with B cuz it sounds like a property
Cells use a molecule called (DNA / RNA / ATP / CMP) to store and release energy like a battery. The energy is stored in chemical bonds between (nucleotide / oxygen / phosphate / ribose) groups of the molecule, and the energy is released when the chemical bonds are broken.
Answer:
Cells use a molecule called ATP to store and release energy like a battery. The energy is stored in chemical bonds between phosphate groups of the molecule, and the energy is released when the chemical bonds are broken.
Explanation:
The Adenosine Triphosphate (ATP) is a molecule made of adenine, ribose, and three phosphate groups, which are the ones that store the energy in its bounds. The ATP is the molecule that provides the energy to the different processes that happen in a cell. The molecule is made from the glycogen, fats, and carbohydrates that the body has absorbed in the intestines. When the body needs energy, the ATP loses one or two phosphates, becoming ADP and AMP. When the phosphorylation happens, which is the loss of phosphate, the energy is released.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
Answer: dominant
Explanation:
Reflex action
(a)
Miriam accidently touches a hot pot and quickly withdraw her hand. Describe
the series of events in the nervous system which causes Miriam to react thi
way
Answer:
Reflex action/reflex arc/reflex (allow "involuntary") The stimulus (heat) is detected by temperature receptors in the skin. This causes impulses to travel along a sensory neurone to the spinal cord, due to chemical changes across the synapses. Here they go along a relay neurone, and then are sent via a motor neurone to the effector (an arm muscle in this case). The muscle contracts, moving the hand away and preventing further harm.
What is the function of the nucleus in plant and animal cells? A. Produces all the power of the cell B. Creates proteins within the cell C. Control all cells activity, contains DNA D. Allows things in an out of the cell
Answer:
A. Produces all the power of the cell
Explanation:
Nucleus is the power house of the cell
PLZ MARK BRAINLIEST
Answer:
C
Explanation:
b/c the nucleus of the cell contains the information needed to build a whole new animal, plant, bacterium or fungus.
ASAP ASAP ASAP ASAP HELP HELP HELP PLSLSLSLS
Answer:
You are correct!!
Explanation:
Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors
_______________ is the name for the process of clearing natural vegetation and replacing it with concrete and buildings.
The practice of removing natural vegetation and replacing it with concrete and structures is known as urbanization. This is the correct answer to fill in the blank.
What are the primary factors causing urbanization?Industrialization, commercialization, rural-urban migration, lifestyle changes, career opportunities, social advantages, etc. are the primary reasons of urbanization. The process of urbanization is when people move from rural to urban areas for a variety of reasons.
What results did urbanization produce?Urban areas can expand due to a rise in the population or because people move there. Urbanization frequently causes habitat loss, deforestation, and freshwater extraction from the environment, which can reduce biodiversity and change species ranges and interactions.
To learn more about natural vegetation visit:
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which of the following best represents a water molecule
Explain the Importance of water in your body
PLEASE HELP RN ASAP
Answer:
Your body uses water in all its cells, organs, and tissues to help regulate temperature and maintain other bodily functions. Because your body loses water through breathing, sweating, and digestion, it's important to rehydrate by drinking fluids and eating foods that contain water.
Answer:
Water is needed for your digestive track as it digests foods. As water is also needed for each cell to properly function in your body.
Question 6 of 10
What are the characteristics of a flash flood? Select the three correct
answers.
O A. Occurs quickly
B. Occurs only during a thunderstorm
O C. Lasts a short time
D. Has a large volume of water
Answer: A, C, D
Explanation:
Give brainliest please!
Im not sure if anyone knows this or not.
Can someone please help me with 1 and 2! If u r correct ill mark u was the best answer
I'm pretty sure the answer to 1 is A, but I know for a fact that soil contains microorganisms and microbes.
The answer to question 2 is D (Porosity)