Answer:
Most ocean pollution begins on land.
Much of this runoff flows to the sea, carrying with it agricultural fertilizers and pesticides. Eighty percent of pollution to the marine environment comes from the land. One of the biggest sources is called nonpoint source pollution, which occurs as a result of runoff.
Answer:
Plastic pollution: The ocean is estimated to contain millions of tons of plastic debris, much of which comes from land-based sources.Chemical pollution: The ocean is also contaminated with a wide range of chemicals, including pesticides, herbicides, and industrial and household chemicals.Nutrient pollution: Excess nutrients, such as nitrogen and phosphorus, can enter the ocean from agricultural and urban runoff and contribute to the growth of harmful algal blooms.Oil pollution: Oil spills and other oil discharges into the water can have a negative effect on the animals and marine ecosystems there.
Explanation:
https://www.quora.com/What-percent-of-the-ocean-is-polluted
pls help me with this questions.
A. Karyokinesis is defined as the division of the nucleus during the M phase of the cell cycle. It is the first step in M phase.
B. Cytokinesis is the physical process of cell division, which divides the cytoplasm of a parental cell into two daughter cells.
C. Interkinesis is a period of rest that cells of some species enter during meiosis between meiosis I and meiosis II. No DNA replication occurs during interkinesis.
Lab: Mouse Genetics (One Trait) a whole lab!!!
plzzzzz i need ur helpl guys
A Mouse is considered the model organism for conducting experiments related to humans.
What do you mean by traits?The appearance or manifestation of a character is known as a trait. It is also known as a Phenotype.
A lab is used to demonstrate the experiments based on a specific area of interest. Here, the experiments of mouse genetics are conducted in the lab to investigate the outcome of genotype and phenotype by using a Punnett square.
Therefore, it is required to develop certain traits while performing the experiment on mouse genetics in a lab.
To learn more about Mouse Genetics, refer to the link:
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Explain how the energy used by an athlete during a football game comes from the energy of sunlight. PLEASE ANSWER
BRAINLIT
Mineral.
(a) tilting, (b) Erosion, (c) Folding
Answer:
folding
Explanation:
How is metaphase of mitosis different from metaphase I of meiosis?
Answer:
Metaphase I in Meiosis
The homologous pair is a representation of the same DNA but has different alleles. The homologous pairs will attach to each other during metaphase I and they undergo the alignment on the metaphase plate, unlike in mitosis where the sister chromatids are the ones that align on the metaphase plate.
Which scenario best describes motion?
A. a toy train in position 4 on a number line.
B. a race track that is 100 meters long.
C. a ball rolling from point A to point B.
D. a student living 150 miles from Chicago.
Answer:
c. a ball rolling from point A to point B
Explanation:
a is talking about the position of the train
b is talking about the length of the track
d is talking about the distance a student is from somewhere.
So from taking all these options out we are left with C because the ball is actually moving and when something moves it is in motion.
Explain the differences and similarities among these abiotic and biotic processes in terms of the changes in entropy and heat that contribute to the free energy extracted from chemical bonds, the spontaneity of each, and the role of catalysis.
Answer:Explain the differences and similarities among these abiotic and biotic processes in terms of the changes in entropy and heat that contribute to th
Explanation:
I've always been told that calcium is important for strong, healthy bones. My mom says that
as long as I drink milk, I won't develop osteoporosis. Is this correct? Is there anything else I
can do to protect myself?
Answer
Yes friends,,,,
Your mom is absolutely correct. Milk is very good for our body.
Some others food which are enrich in calcium are
1) green leafy vegetables – such as curly kale, okra and spinach.
soya drinks with added calcium.
2) bread and anything made with fortified flour.
3)fish where you eat the bones – such as sardines and pilchards.
Rain and running water can erode soil. From which area is soil most likely to be eroded?
A. sloping area with bushes
B. flat area with grasses
C. flat area that is barren (without plants)
D. sloping area that is barren (without plants)
Answer: The answer is A
Explanation: Just verifying that hes right.
5. Which of the following properties would be analyzed in the chemistry section of a crime lab? Mark all that apply.
a. density
b. pH
c. viscosity
d. flammability
e. volume
f. malleability
g. color
h. reactivity
Answer: b, d, h
Explanation:
I know you said you don’t need the answer, but it’s for people who have the same question later on-
If a company developed a way to modify a person's DNA to guarantee certain attributes in offspring, should that company be forced to make their technology available to everyone who wanted it? What are some of the ramifications of widespread use of this type of genetic engineering technology on humankind?
Yes, however, random people should not just be taught because people have a tendency to not follow every step, and can hurt themselves. I learned about this, and that if you modify a persons DNA, that's permanent. If you messed up, your offspring could be impacted. This is why we don't just give out information, because people are afraid that if we messed up, we could end the world or something.
This process most likely leads to an increase in which following?
What is a tumor in biology?
What is a part of the year that has a unique amount of daylight or precipitation?
A. photoperiod
B. season
C. month
D. planting zone
Answer: season
Explanation: it’s season ( took the test )
Answer:
B. season
Explanation:
correct
how to frequent are pandemics ?
Answer:
i would say they are pretty not frequent they happen after a certain amount years
Explanation:
Which of the following is mainly responsible for the removal of carbon dioxide from the atmosphere? A. animals B. factories C. soil D. plants
Answer:
D. Plants
Explanation:
They get the Carbon Dioxide for photosynthesis
4. In this investigation oxygen production was used to measure the light reaction. What are
two additional products that could be measured? What purpose do they serve in the light-
independent (dark) reaction?
Answer:
Photosynthesis is the process by which green plants absorb light energy from the sun with the assistance of water and carbon dioxide, and transform it into chemical energy to make (synthesize) carbohydrate (specifically glucose) and oxygen.
The "light-independent" or dark reactions happen in the stroma of the chloroplasts. This is also known as the Calvin Cycle. Since these processes can only happen in the chloroplast (a chlorophyll filled plastid in green plants), photosynthesis can only happen in green plants!
The first overall principle of photosynthesis is that the light energy from the sun is transformed into chemical energy and stored in the bonds of glucose (the sugar carbohydrate) for later use by the plant and/or organism that eats the plant.
The second overall principle of photosynthesis is that carbon, oxygen, and hydrogen atoms are taken from carbon dioxide and water molecules and are broken up and rearranged into new substances: carbohydrate (specifically glucose) and oxygen gas (so we can breathe, whew!). This reaction represents the transfer of matter: carbon dioxide from the atmosphere, water from the soil or atmosphere, into sugar in the plant and oxygen back into the atmosphere.
Light-Dependent Reactions
The first part of the process happens in the thylakoids of the chloroplasts and are the "light-dependent" reactions: The photosystems I and II absorb the photons from the sunlight and process them through the membranes of the thylakoids simultaneously. The photons excite electrons in the chlorphyll which then move through the electron transport chain and causes NADP- to combine with H+ forming NADPH. At the same time, ADP (adenosine diphosphate) has come from the dark reaction and a third phosphate chain is bonded forming ATP (adenosine triphosphate) to feed the Calvin Cycle next. Remember that ATP is the important source of all cellular energy.
We now believe that all the oxygen released in photosynthesis comes from the water molecules and all oxygen atoms that form the carbohydrates come from the carbon dioxide molecules. So, in other words during the light-dependent reaction a water molecule is broken down producing two H+ ions and half an oxygen molecule. We get the rest of the oxygen molecule when another water molecule is broken down.
Dark Reactions
Dark reactions are also known as the Calvin Cycle, the Calvin-Benson cycle, and light-independent reactions. The point is that they do not require sunlight to complete their process.
After ATP is formed in the first part of photosynthesis, for living things to grow, reproduce and repair themselves, the inorganic form of CO2 must be transformed into carbohydrate. This happens during the Calvin Cycle in the stroma (the fluid filled interior of the chloroplast). ATP and NADPH combine with CO2 and water to make the end product of glucose. The ADP and NADPH+ are recycled to the light-dependent side to start the process over.
Remember that during hours of darkness, plants cannot perform photosynthesis so they do cellular respiration in the mitochondria just as all living organisms do.
Explanation:
I hope this helps
HELP! Transcribe the following DNA base code into the complementary mRNA codons: TACAATCCGCAT
4. Which of the following describes how a large mouse population with high genetic
diversity will most likely be affected by a sudden, significant environmental change?
(SB6d)
A. All of the individuals within the population will reproduce at a higher rate, leading
to a decrease in genetic diversity.
B. New traits will arise as a result of new selective pressures in the environment,
leading to an increase in genetic diversity.
C. Only those individuals best adapted to the new environment will survive and
reproduce, leading to a decrease in genetic diversity.
D. Only some individuals will develop traits to help them survive in the new
environment, leading to an increase in genetic diversity.
how are sex linked traits determined
Answer:
A sex-linked trait refers to genes that determine a specific structural or functional characteristic and are found on an X or Y sex chromosome.
Explanation:
The X and Y sex chromosomes are what determine the sex of an individual, XY for male and XX for female. A sex chromosome-linked trait refers to specific genes located on one of the sex chromosomes.
In general, the X sex chromosome is capable of having more traits linked to it because it is larger than the Y chromosome.
Genes are what determine the morphological and functional characteristics of an individual. When specific genes are found on a sex chromosome, the traits that they determine will be given to the offspring through that chromosome.
do nucleotide bonds dehydrate plants? i just need a yes or no answer
Answer:
no
Explanation:
idk
What lab tools are present in the picture?
A.
ring stand, ring clamp, wire gauze, erlenmeyer flask, bunsen burner
B.
balance, beaker, tongs, filter paper, bunsen burner
C.
ring stand, tongs, watch glass, flint striker, erlenmeyer flask
D.
balance, beaker, wire gauze, hot plate, forceps
Answer:
the correct answer is A.
Lab tools present in the picture are ring stand, tongs, watch glass, flint striker, erlenmeyer flask.Thus, option C is correct.
What are the safety measures that should be taken in laboratory?There are several safety measures that should be taken while performing an experiment in lab such as avoid drink and food while working in laboratory and wear PPE kit to keep yourself safe.
Never work lonely in the lab because this condition will turn into danger situation as suppose a person works lonely and due to reaction of some chemical the person become unconsious than there is no one to help him.
Always wear gloves, PPE kit, proper shoes, lab coat of full sleeves with safety goggles. All these things will helps to keep a person safe in lab while experiment.
Therefore, Lab tools present in the picture are ring stand, tongs, watch glass, flint striker, erlenmeyer flask.Thus, option C is correct.
Learn more about safety measures in laboratory here:
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When skin is exposed to certain ultraviolet rays, the cells produce more melanin, causing the skin to darken. Over time, the cells can be damaged by these ultraviolet rays, which can lead to skin cancers. Which conclusion can most likely be drawn about the rates of skin cancer?
A. Skin cells with a low concentration of melanin have the lowest risk of developing into cancer cells.
B. Skin cells with a high concentration of melanin have the highest risk of developing into cancer cells.
C. Skin cells with a low concentration of melanin have a lower risk of developing into cancer cells than cells with a high concentration of melanin.
D. Skin cells with a high concentration of melanin have a lower risk of developing into cancer cells than cells with a low concentration of melanin.
Answer:
C
Explanation:
i think
Answer:
c
Explanation:
how is the structure of a caesium-134 atom different from the structure of an caesium-137 atom?
Answer:
Favorite Answer
Cs-134 has three fewer neutrons than Cs-137. Cs is element 55, meaning these isotopes have 79 and 82 neutrons, respectively.
P-32 has one more neutron than P-31. P-32 has 17 neutrons, and P-31 has 16.
Our brains, nerves, and spinal cords are made up of specialized cells that you don't find anywhere else in
the body.
True or false?
Answer:
TRUE
Explanation:
Central to the functioning of the nervous system is an extensive network of specialized cells called neurons, There are basically two major types of nerves: sensory and motor. Sensory nerves send information such as touch, temperature, and pain to the brain and spinal cord., Sensory neurons carry nerve impulses from tissues and organs to the spinal cord and brain. Motor neurons carry nerve impulses from the brain and spinal cord to muscles and glands(see Figure below). Interneurons carry nerve impulses back and forth between sensory and motor neurons.
pls give me brainliest i really need it
and good luck on your work
Our brains, nerves, and spinal cords are made up of specialized cells that you don't find anywhere else in the body is a true statement.
What is brain?The brain, spinal cord, and a sophisticated nerve network are all parts of the nervous system. The brain and the body are communicated with via this system.
All bodily functions are managed by the brain. From the brain, the spinal cord descends via the back. It is made up of strands of nerves that branch out to every organ and area of the body.
The brain sends and receives messages via this network of nerves to many regions of the body.
Therefore, Our brains, nerves, and spinal cords are made up of specialized cells that you don't find anywhere else in the body is a true statement.
To learn more about brain, refer to the link:
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A car moves at a speed of 50 kilometers/hour. Its kinetic energy is 400 joules. If the same car moves at a speed of 100 kilometers/hour, then its kinetic energy will be
Answer:
1601.33J
Explanation:
Kinetic energy = 1/2 × mv²
Where;
m = mass (kg)
v = velocity (m/s)
To calculate the kinetic energy of the same car at a different speed, we initially need to calculate the mass of the car.
The initial velocity of the car is 50km/hr = 13.89m/s, while the kinetic energy is 400Joules
K.E = 1/2 × mv²
400 = 1/2 × m × 13.89²
400 = 1/2 × m × 192.93
400 = 96.466m
m = 400/96.466
m = 4.15kg
Mass of the car is 4.15kg
K.E = 1/2mv²
If velocity = 100 kilometers/hour = 27.78m/s
K.E = 1/2 × 4.15 × 27.78²
K.E = 1/2 × 3202.67
K.E = 1601.33J
Answer:
1600j
Explanation:
ke prop to v^2
ke1/v1^2=ke2/v2^2
400/50x50=joules/100x100
400x2x2
Is there a time during the cell cycle when you could extract more DNA than normal? When and why?
Answer:
S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells.
Choose all the answers that apply.
The cerebrum is _____.
(A) the center of intelligence and thought
(B) covered by a thin layer of gray matter
(C) connected to the sensory organs
(D) divided into two hemispheres
responsible for balance and reflexes
Answer:
The cerebrum is connected to the sensory organs, divided into two hemispheres, and responsible for balance and reflexes. I hope this helps!!!!!
Explanation:
I know this because I got it right in my test I hope this helps people!!!!!!!!!!
(And I just learned about the cerebrum last week!!!!!!!)
Number 17 PLEASE HELP 20 points if u right dont just take the points please or i will report you
Answer:
i think the answer is G Large Central Vacuole
Explanation:
Answer:
This is a mitochondrion!
Explanation:
Mitochondria can always be recognized by their internal folds. Hope this helps!
All atoms of the same element have the same number of ___________, which is called the atomic number.
