Answer:
Blood is prevented from backflow by valves in veins.
Explanation:
A biologist has mixed the polysaccharide agarose with other components to create a gel.
Which choice best describes the next step in gel electrophoresis?
A.The mixture is poured into a special tray and allowed to cool and solidify.
B.An electric current is run through the gel.
C.The gel is placed in a box with positive and negative electrodes.
D.DNA samples are loaded into wells.
Answer:
a
Explanation:
n.a
What type of forensic evidence was recovered during the bomb set off at the New Mexico facility on the video that was similar to the evidence obtained at the Boston bombings and how did this evidence allow researchers to connect other pieces of evidence to the same bomb
Answer:
they were pressure cooker bombs
Which of the following had the highest social hierarchy in Japanese culture during this time period?
A. Peasants and Artisans
B. Merchants
C. Samurai
D. Emperor
The images stored on microfilm and microfiche are so large that they can be read without a microfilm or microfiche reader. Group of answer choices True False
The images stored on microfilm and microfiche cannot be read without a microfilm reader : i.e. statement in the question is False
What is a microfilm ?A microfilm is film which contains photographic records stored in a small scale order than the natural scale of a graphic/printed matter. Images stored on microfilm and microfiche are so small that a microfilm or microfiche reader is required to read them.
Hence we can conclude that statement in the question is False.
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describe how dna can be used to classify organisms
Scientists can use DNA sequences to help determine if they have discovered a new species. Scientists can also compare DNA sequences from different organisms and measure the number of changes (mutations) between them to infer if species are closely or distantly related.
Select the correct answer from each drop-down menu. the carrying capacity of a wildlife reserve is 570 individuals for a particular species of rodents. if the area of the reserve is extended, the carrying capacity is likely to . during the summer, a fatal disease began killing individuals. the carrying capacity of the reserve will therefore .
If during the summer, a fatal disease began to kill individuals. the carrying capacity of the reserve will therefore be increased.
What is carrying capacity?The carrying capacity of an environment is the maximum population size of a biological species that the environment can sustain indefinitely, taking into account
foodhabitatwaterand other needs available in the environment.With this information, we can conclude that if during the summer, a fatal disease began to kill individuals. the carrying capacity of the reserve will therefore be increased.
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The outermost layer of earth's atmosphere is
A.troposphere
B.startosphere
C.mesosphere
D.thermosphere
Answer:
the answer is D. Thermosphere
help please
BIOLOGY!!
Answer:
provides protection and support
Explanation:
Mackenzie notices that her best friend can apply paint in a perfectly straight line on a ceramic pot. Mackenzie knows
that paint is hard to control at times, but she tries it anyway and ends up stroking a straight line on first try, just like her
best friend. Did Mackenzie successfully model her best friend's painting skills?
No, because she didn't ask her friend for help.
Yes, because she observed her friend and knew she could do better.
Yes, because she was able to draw a straight paint line just as her friend did.
No, because she didn't have to try more than once.
Some resources are not readily available for conversion to energy. Which choice below would MOST likely limit the amount hydroelectricity that can be produce and used in the area?
A- Sunlight
B-Wind
C-water
D-biomass
The amount of water is MOST likely limit the amount hydroelectricity that can be produce and used in the area.
What is hydroelectricity?Hydroelectricity is the electricity which is generated from the water.
Hydroelectricity converts the kinetic energy of moving water current to electrical energy in a dynamo.
Therefore, the amount of water is MOST likely limit the amount hydroelectricity that can be produce and used in the area.
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select the correct answer from each drop down menu
complete the sentence about sea floor spreading
seafloor spreading is caused by ___ (divergent, convergent, transform) boundaries and results in ___ (more continental land, mountains on land, mid ocean ridges)
Answer:
divergent,mid ocean ridges
Explanation:
the seafloor diverge from each other causing the land to go thinner and thinner and thinner and make an opening between the floors and continue to move away from each other until they touch a more firm land to be able to stop, then the mid ocean ridges come between the floors where inside there is water and on the side there are the ridges
Hi! I need some help with this. (Btw ignore the crumbled paper, I was having a breakdown.) Thank you!!
Answer:
Explanation:
Answer:
Explanation:
1. Producers make their own food, so option C.
2. Consumers eat others cuz they can't make their own food, so option G.
3. Herbivores (like cows) eat producers (like grasses, plants etc.), thus option E.
4. Carnivores (like tigers) eat other consumers (like cows, deers, even baby tigers) so option H.
5. Omivores eat everything (plants or animals) like humans thus option J
6 Decomposers (like fungi) break down dead stuff so option A.
7 Biotic means living things, thus option F
8 Abiotic is non-living things, thus option B.
9 Mutualism means both animals benefit from helping each other out, option D.
10 Parasites (like leech) harm the host and benefit themselves, thus option i
11 Commensalism means one benefits but the other one is not benefit or harmed, option S
12 P
13 L
14 R
15 N
16 T
17 M
18 Q
19 K
20 O
Not 100% sure on 12, 18-20 but everything else should be right.
many marine organisms depend on upwelling to bring nutrients to surface. how might El Nino affect a fisherman's way of life
The upwelling of seawater refers to the rising up of the deeper and cold water towards the surface of the sea. This cold water is comprised of the valuable and essential nutrients and as they move upward, it provides these nutrients to the marine organisms.
What is El Nino?El Nino is usually defined as the large-scale changes in the climate that occurs due to the interaction between the ocean and the atmosphere. It leads to the episodic rise in the temperature of the sea surface, which typically occurs in the central and the eastern part of the central Equatorial Pacific.
The occurrence of El Nino leads to the reduction of the upwelling of deep-sea cold water. During the time of this harsh climate, the fishes die or they sometimes migrate into some other places where they can obtain their food. Due to this, the fisherman cannot go fishing.
Thus, the occurrence of El Nino directly affects a fisherman's life.
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Both the liver and kidneys are organs of the excretory system. how do the two organs work together to complete a task? a. the kidneys convert nitrogenous wastes into urea, and the liver filters urea from the blood. b. the kidneys filter urea from the blood to make urine, while the liver filters urea from blood to make lymph. c. the liver converts nitrogenous wastes into urea, and the kidneys filter urea from the blood. d. the liver filters urea from the blood and passes it to the kidneys, which eliminate the urea in urine.
Answer:
a.
Explanation:
The kidney converys Nitrogenous waste into urea, and the liver filters the urea from the blood.
Pleasee help
how is climate change a feedback loop ?
Answer:
tbh i dont even know
Explanation:
Which statement best describes an interaction with the geosphere?
Glaciers shape a mountain valley.
Rain increases acidity of a lake.
Carbon dioxide dissolves in oceans.
Animals release carbon dioxide into the air.
the potential source of land pollution in your locality
Answer:
Littering
Explanation:
People dispose little anyhow and anywhere
2. Describe the role of the following in maintaining a constant body temperature in humans:
(c) The thyroid gland:
Answer:
The thyroid produces hormones that are able to influence how much the blood vessels dilate. In turn, this affects how much heat can escape the body.
If the membrane was completely permeable,the concentration inside the cell would be about the same as the outside. Give reason?
If the cell membrane is permeable to some solute, this means the solute is free to move in or out of the cell, depending on its concentration gradient. The solute will move by diffusion from the area with high concentration to the area with low concentration. So if the concentration of this solute is higher outside of the cell compared to the inside, then it will move into the cell until its concentration is equal on both sides.
What are Exxon-Valdez and Deepwater Horizon?
A. The new desalination plants in California to fight the drought.
B. The source of massive oil spills.
C. Solar energy companies set to end reliance on oil.
Is there any type of ecological relationship between wolf and moose populations on Isle Royale? If not, explain why not. If so, what is the relationship?
USE CLAIM, EVIDENCE, AND REASONING
The Prey-Predator relationship is the type of ecological relationship between wolf and moose populations on Isle Royale.
What do you mean by Ecological relationship?The Ecological relationship may be defined as the interaction between the members of one species with respect to the members of the other in response to food, shelter, and space.
Moose are herbivores and the prey of wolfs. It is clearly seen in the graph that when the population of wolves increases, the number of moose decreases. It states that wolfs feed on moose.
Therefore, the Prey-Predator relationship is the type of ecological relationship between wolf and moose populations on Isle Royale.
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why farmers are manuring at the roots of the plant
Answer:healthy plants
Explanation:the farmers use raw manure on their fields because it is an excellent source of nitrogen (N), phosphorus (P) and potassium (K), which are all nutrients necessary for plants to grow and thrive.
Answer:
The reason why farmers put manure at the roots of the plants is because that is how most of the nutrition is taking up into the plant. Most of the minerals in the earth are absorbed into the plant for usage by the roots which is why the manure would be placed where the roots are. However, it's important to not put too much because that can actually cause the roots to get burned because there is too much minerals so it's important to keep a balance.
Which describes how viruses reproduce
when using a living host?
A. they cannot reproduce
B. slowly
C. with non-living material
D. quickly
Answer:
c.po
correct me if I'm wrong but Mao jdt aho NASA isip nho..tnx
Which statement best explains why DNA is replicated within the cell?
Explanation:
Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. The replication process relies on the fact that each strand of DNA can serve as a template for duplication.
How do you think water can become polluted?
Name the organelles.
Answer:
A: Nucleus
B: Cytoplasm
C: Vacuoles
D: Cell Membrane
E: Mitochondria
Explanation:
The statement : On Earth, objects that are heavier than air will always fall toward the ground is the____ of gravity.
A. law
B. conclusion
C. theory
D. hypothesis
Answer:
a the law of gravity
On Earth, objects that are heavier than air will always fall toward the ground is the law of gravity.
What is gravity?
Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
Newton’s law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them.it means object are heavier than air will always fall ground because of law of gravitation.
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What is the best part about biology
Answer:
it is life
Explanation:
it provides an in depth scientific understanding of how living and non-living organisms interact
Building proteins and DNA is the reason organisms need what substance?
Answer:
Nitrogen
Explanation:
All living organisms need nitrogen in order to build proteins and build DNA.
Some animals (most) get nitrogen by eating plants I believe.
explain in the different between barried method of contracetption and hormonal method contraception and given example for contraception method
A barrier method of contraception is a method that prevents the contact of sperm and ovum with the help of barriers. Examples include spermicidal creams, cervical caps, and condoms.
What do you mean by Contraception?Contraception may be defined as the method of restricting the number of children parents have. It is also comprehended as birth control or fertility control. It works in such a way that it prevents the process of successful fertilization.
Hormonal method contraception may be defined as those methods that alter the normal function and effectiveness of hormones like estrogen and progesterone. Examples include intrauterine devices, pills, injections, etc.
Therefore, the difference between the barrier method of contraception and the hormonal method of contraception is described above.
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