Answer:
The wires used in lines are made up of metals such as copper, metals are used because they conduct heat and electricity.
Metals expand when there is increase in temperature and contract when the temperature lowers down, the wires get heated up due to high voltage of electricity that flows through it that increases the vibration of atoms in a metal and leads to rise of temperature. That is why the metala are not strung tightly.
why do we have so much dna?
Answer:
Of the trillions of cells that compose our body, from neurons that relay signals throughout the brain to immune cells that help defend our bodies from constant external assault, almost every one contains the same 3 billion DNA base pairs that make up the human genome – the entirety of our genetic material. It is remarkable that each of the over 200 cell types in the body interprets this identical information very differently in order to perform the functions necessary to keep us alive. This demonstrates that we need to look beyond the sequence of DNA itself in order to understand how an organism and its cells function.
Explanation:
please give me your answer
Answer:
August
Explanation:
in rainfall it had the highest number
High levels of salt (Na Cl-) can disrupt the tertiary structure of proteins. What effect do you think increasing concentrations of salt would have on lactase activity
Increasing concentrations of salt would disrupt lactase activity by disrupting its tertiary structure. This enzyme breaks down lactose.
What is an enzyme?An enzyme is a protein that acts to lower the activation energy of a given chemical reaction.
Lactase is an enzyme that acts to break down lactose (a disaccharide) into galactose and glucose.
Different conditions in the media (in this case, concentrations of salt) may disrupt enzyme activity by altering its tertiary 3D structure.
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a neuron consists of a large cell body with
A. Multiple dendrites and multiple axons
B. Multiple dendrites and one axon
C. one dendrite and one axon
D. one dendrite and multiple axons
Drag the tiles to the correct boxes to complete the pairs.
Organisms compete for limited resources at many levels. Match each scenario to the type of competition it exhibits.
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Intraspecific direct:
all the gray wolves feed on the same type of preytwo male deers fight over a mateInterspecific, indirect:
A robin and a blue jay try to eat the same wormthe rise in one species of bird limits the nesting space for other speciesTypes of competitionCompetition is a type of interaction in which two or more organisms of the same or different species compete over common limited resources.
When the competition involves organisms of the same species, the competition is said to be direct or intraspecific.
On the other hand, if the competition for resources involves organisms of different species, the competition is said to be indirect or interspecific.
Thus, all gray wolves feeding on the same type of prey and two male deers fighting over a mate are examples of direct or intraspecific competition. In the same vein, a robin and a blue jay trying to eat the same worm and the rise in one species of bird limiting the nesting space for other species are examples of indirect or interspecific competition.
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Which of these is an example of how the ocean plays an important role in climate change? ( 10 points)
Group of answer choices
Circulation in the ocean creates warm and cold currents that affect the air temperature.
Aquatic animals produce carbon dioxide during respiration which causes warming of ocean waters.
Aquatic plants release oxygen during photosynthesis which helps keep the climate cool.
Water vapor escapes from the ocean's surface during day time and reduces the effect of warming due to greenhouse gases.
This is Earth Science :)
Answer:
The first one Circulation in the ocean creates warm and cold currents that affect the air temperature.
Explanation:
Why DNA is absent in blood plasma?
Answer:
Why do blood cells not have DNA?
Because of the lack of nuclei and organelles, mature red blood cells do not contain DNA and cannot synthesize any RNA, and consequently cannot divide and have limited repair capabilities. The inability to carry out protein synthesis means that no virus can evolve to target mammalian red blood cells.
Explanation:
Blood plasma is a light amber-coloured liquid component of blood in which blood cells are absent but contains proteins and other constituents of whole blood in suspension. It makes up about 55% of the body's total blood volume. It is the intravascular part of extracellular fluid (all body fluid outside cells). It is mostly water (up to 95% by volume) and contains important dissolved proteins, hormones, carbon dioxide (plasma being the main medium for excretory product transportation), and oxygen. It plays a vital role in an intravascular osmotic effect that keeps electrolyte concentration balanced and protects the body from infection and other blood-related disorders.
Blood plasma is separated from the blood by spinning a tube of fresh blood containing an anticoagulant in a centrifuge until the blood cells fall to the bottom of the tube. The blood plasma is then poured or drawn off. For point-of-care testing applications, plasma can be extracted from whole blood via filtration or via agglutination to allow for rapid testing of specific biomarkers. Blood plasma has a density of approximately 1,025 kg/m3 (1.025 g/ml).
Blood serum is blood plasma without clotting factors.
Plasmapheresis is a medical therapy that involves blood plasma extraction, treatment, and reintegration.
Fresh frozen plasma is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system. It is of critical importance in the treatment of many types of trauma that result in blood loss and is therefore kept stocked universally in all medical facilities capable of treating trauma.
Mention four ways to keep your environment clean
Answer:
Recycle, Drive your car less, Save water, and Save Electricity
Explanation:
Salt marshes are
A) found in temperate intertidal zones
B) too salty (saline) for most species found in the intertidal zone
C) found where mangroves grow along shorelines
D) typically found on remote tropical islands
E) typically found wherever violent wave action scours a shoreline
Salt marshes are too salty for most of the species that are found in the intertidal zone is the correct statement.
What are salt marches?Salt marshes are coastal wetlands that are drained by salt water which is brought by the tides. They are marshy because the soil may be composed of deep mud and peat so we can conclude that Salt marshes are too salty for most species found in the intertidal zone.
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The correct option is "A" which is found in temperate intertidal zones.
What is a salt marsh?Salt marshes are coastal wetlands that are flooded and drained by salt water brought in by the tides. They are marshy because the soil may be composed of deep mud and peat.
Thus, the option is "A" which is found in temperate intertidal zones.
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The dense needles of Douglas fir trees can
prevent most light from reaching the forest
floor. This situation would have an immediate
effect on ?
The dense needle of Douglas fir trees preventing light from reaching the forest floor will have an immediate effect on the understory producers.
What are producers?Producers are green plants that are capable of utilizing solar radiation to fix carbon dioxide into carbohydrates.
A forest contains several layers of trees and may or may not have a herbaceous cover of herbaceous plants.
If the tree layers permit light to reach the floor of the forest, herbaceous ground cover may thrive. Otherwise, only a few, shade-tolerant herbs will grow on the ground layer.
In other words, if the dense needles of Douglas fir trees prevent most light from reaching the forest floor, it will have an immediate implication on the herbaceous ground cover of the forest.
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Which environmental change occurs most rapidly?
human population growth
forest succession
tornado
decomposition
Answer:
Tornado
Explanation:
I took the test :D
Answer:
c. tornado for K12
Question 14 of 25
The particles of a substance stay close together but slide past one another
as they move. When thermal energy is removed from the substance, the
particles are forced into fixed positions by their attraction to one another.
What change in state has occurred?
O A. Gas to solid
O B. Liquid to solid
O c. Solid to liquid
D. Gas to liquid
SUBMIT
Answer:
A is the answer
a because of there attraction force and they goes to fixed position
Answer: liquid to solid
Explanation:
With copd, there is a decreased air flow from the lungs. This could be caused by which of the following reasons? select all that apply.
The causes of COPD may be lifestyle choices such as smoking or respiratory infections.
What is COPD?Chronic obstructive pulmonary disorder, COPD is an irreversible respiratory disorder that is characterized by difficulty in breathing.
Symptoms of COPD include:
difficulty breathing,chronic cough, often,tiredness, etc.The causes of COPD include:
destruction of parts of the lungmucus blocking the airways,inflammation and swelling of the airway lining.infectionssmokingTherefore, the causes of COPD may be lifestyle choices or repiratiry infections.
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In which stage and location of aerobic cellular respiration is most of the energy extracted from glucose?
O stage 1 in the cytoplasm
Ostage 1 in the mitochondria
Ostage 2 in the cytoplasm
Ostage 2 in the mitochondria
Answer:
it should be d
Explanation:
tell me if i'm wrong.
Answer:
d
Explanation:
tell me if I’m wrong
What is the difference between facilitated diffusion and active
transport?
A. Facilitated diffusion uses ATP and moves substances with the
concentration gradient; active transport does not.
B. Active transport uses ATP and moves substances against the
concentration gradient; facilitated diffusion does not.
C. Active transport uses ATP and does not require a carrier protein;
facilitated diffusion does neither.
D. Facilitated diffusion uses ATP and requires a carrier protein; active
transport does not.
Answer:
B.) Active transport uses ATP and moves substances against the concentration gradient; facilitated diffusion does not.
Select the statements that correctly describe how a new DNA molecule reflects the original DNA molecule from which it was copied. Select the TWO answers that are correct.
a. DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original.
b. The nitrogenous bases in the new DNA molecule are A, T, G, and C, but the original molecule contains A, U, G, and C.
c. Each new DNA molecule contains an original strand and a newly synthesized strand.
d. The two DNA molecules are exact opposites of each other according to base pairs.
e. Base pairing rules duplicate the base pairs of the original molecule in the new molecule.
Answer:
a. DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original
c. Each new DNA molecule contains an original strand and a newly synthesized strand.
Explanation:
DNA replication is an important process every cell must undergo prior to division. DNA replication is the process whereby DNA content is doubled. It occurs as a result of an enzyme called DNA polymerase, which synthesizes nucleotides.
DNA replication follows the semi-conservative model which uses one original DNA strand to synthesize a new DNA strand. The double-stranded DNA is separated into two single strands which serve as template for new strands. Due to the action of DNA polymerase, DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original.
Also, each newly synthesized DNA molecule which is similar to one another contains an original strand (template) and a newly synthesized strand.
Demi is studying the amount of snowfall at the South Pole. She wants to describe it using cause and effect. How could she do that?
Answer:
She wants to describe it using cause and effect. How could she do that? She can't. Some things, like the amount of snowfall, do not have a cause; they just happen.
Answer: She cant
Explanation: She cant because the amount of snowfall dont have a cause for it. It is natural.
What is the function of a top predator in an ecosystem? (1 point)
O It increases the food for other predator species.
o It creates imbalance in the ecosystem.
o It helps increase the number of prey.
o It maintains other populations.
i need short note on energy giving foods
Explanation: Energy-giving foods are those which are having proteins and nutrients(i.e protective nutrient, energy-giving nutrient, and bodybuilding nutrient) and also give energy to our body are known as energy giving food. Eg: Milk, Rice, Bananas, Potatoes, Bread ETC.
martin divides a shape into 3 equal parts. what unit fraction can he write to represent 1 part
Answer:
1/3
Explanation:
1 shape split into 3 makes 1/3
What is the wave speed of a deep water wave if the wavelength is 48.2 meters?
The value of the frequency of the wave was assumed to be 50Hz and the speed was computed to be 2410 m/s
Wave and MotionGiven Data
Wavelength = 48.2 metersFrequency f = 50 Hz (Assumed value)We know that the relationship between speed, frequency and wavelength is given as
v = fλ
Substitute our values and solving for velocity(Speed) we have
v = 50*48.2
v = 2410 m/s
Hence the speed of the wave is 2410 m/s
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The black soil that the Nile left on the flooded Egyptian land was called __________.
A.
silt
B.
mud
C.
moss
D.
fertilizer
Answer:
A. Silt
Explanation:
Silt is generally considered the soft, nutrient rich soil carried downstream by a river. Mud is just any significantly wet dirt. Moss is a type of biological growth. Fertilizer is generally considered to be anything man-made which gives plants additional nutrients.
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A polypeptide is another name for the basic structure of a:.
A disadvantage of ________ reproduction is that offspring generally have more competition for resources, such as food and living space.
Answer: asexual
Explanation:
A disadvantage of asexual reproduction is that offspring generally have more competition for resources, such as food and living space
Answer:
Asexual
Explanation:
fats and oils are examples
A( carbohydrates
B( lipids
C( proteins
D( nucleic acids
Why the organisms are keystone species using species?
Answer:
In a marine ecosystem, or any type of ecosystem, a keystone species is an organism that helps hold the system together. Without its keystone species, ecosystems would look very different. Some ecosystems might not be able to adapt to environmental changes if their keystone species disappeared.
What role do animals have in the water cycle?
Answer: Animals release water vaper when they exhale.
Explanation: the water cycle shows a continuous movement of water within the Earth and atmosphere. Liquid water evaporates into water vapor, condenses to form clouds, and precipitate back to Earth as rain and snow.
In a condition known as pneumothorax, the integrity of the pleural cavity is lost, which leads to a collapsed lung. What is one explanation for why this occurs?.
Answer: It can happen when an open injury in your lung tissue causes air to leak into the pleural space. The resulting increased pressure on the outside of your lung causes it to collapse.
Explanation:
1. Which of the following is the process of reproducing or creating a new plant or
seedling?
A. scientific method B. plant propagation C. Gardening D. replanting
Answer:
plant propagation
Explanation:
Plant propagation is the process which grows new plants from a variety of sources: seeds, cuttings, and other plant parts. Plant propagation can also refer to the man-made or natural dispersal of seeds.
The most defining characteristic of ecdysozoans is:.
Answer:
The most distinguishing and prominent feature of Ecdysozoans is their cuticle: a tough, but flexible exoskeleton that protects these animals from water loss, predators, and other aspects of the external environment. All members of this superphylum periodically molt or shed their cuticle as they grow.
Explanation: