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3 years ago

Why is the skin a good defense for the immune system?

1 answer:

6 0

Because it's an outer layer protecting everything inside the body, and we are practically covered in it with few opportunities / holes where bacteria can enter to cause difference to the immune system.

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How does the Grand Canyon help us understand about how the Earth’s Surface Changes AND why there are different types of rocks?

mel-nik [20]

In the Grand Canyon, there are clear horizontal layers of different rocks that provide information about where, when, and how they were deposited, long before the canyon was even carved.

3 0

3 years ago

The organ above is responsible for filtering wastes from the digestion of proteins and cleaning the blood of excess salts. It is

wel

Answer:

The organ above is responsible for filtering wastes from the digestion of proteins and cleaning the blood of excess salts. It is found in the lower back. It is the kidney and is part of the excretory system.

Explanation:

Kidneys are a pair of a bean-shaped organ which are located in the back abdominal area, under the rib cage. The major function of kidneys is to filter waste from the blood. The waste materials from the food we consume is filtered by the kidneys. Other functions of the kidney include maintaining the fluid balance of the body.

The kidney is one of the major organ of the excretory system along with the ureters and urinary bladder.

5 0

3 years ago

Put these steps in the order in which they occur in light-dependent reactions. Electrons are transferred from photosystem II to

Tamiku [17]

Explanation:

Light energy is absorbed and transferred to the reaction center.
A water molecule is split.
Electrons are transferred from photosystem II to photosystem I.
ATP is synthesized from ADP and inorganic phosphate.

Further Explanation:

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

The chloroplast is a membrane bound organelle found in plants. It contains several invaginations of a plasma membrane called the thylakoid membrane. This contains chlorophyll pigments, in stacks called granum, while the internal spaces of the organelle are called the lumen. Liquid surrounds the granum, forming the stroma.

During the light reaction:

Light is absorbed by pigments in phosystem II (PSII). This energy is transferred among pigments til it gets to the reaction center, and is transferred to P680; this promotes an electron to a higher energy level where it then goes to an acceptor molecule.

Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II. Additionally, water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent.
the electron moves down an electron transport chain (ti PS I)where it experiences continuous energy loss. This energy fuels the pumping of H+ from the stroma to thykaloid, leading to the formation of a gradient. The H+ move along their gradient and cross through ATP synthase, into the the stroma.
ATP synthase converts ADP and Pi to the energy storage molecule ATP.
The electron gets to photosystem I where it goes to pigments at P700. It absorbs light energy, the electron is promoted to a higher energy level, and passed to an electron acceptor. This leaves a space for another electron which is then replaced by one from photosystem II.
in the ETC, the molecule NADP is reduced to NADPH by providing H+ ions. NADP and NADPH are integral to the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules.

Learn more about Photosynthesis at brainly.com/question/4216541

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

5 0

3 years ago

What is the main difference between renewable and nonrenewable resources

Julli [10]

The main difference of renewable and non-renewable resources lies in the capacity of the environment to replenish itself. Renewable resources are resources that can be easily replenished by the environment over a short period of time, while non-renewable resources take more time. 

Examples of renewable resources are solar energy, harnessing the sun's power that shines day to day. Wind energy that exists naturally is also a renewable source. Geothermal energy, heat coming from the center of the Earth, and Biofuels, fuels made from living organisms, are all renewable energy.

Non-renewable energy resources are the fuels we use in our cars, minerals from the soil, coal, among others are supplies that also come from Earth. These are all materials that might take a long time (probably millions of years) to be fully restored.

4 0

3 years ago

Read 2 more answers

Most of the worlds deserts are located at latitudes where

icang [17]

Most of the worlds deserts are located at latitudes where cold, dry air moving toward the poles descends.

E) cold, dry air moving toward the poles descends.

Explanation:

A large portion of the world's deserts are situated almost 30 degrees north scope and 30 degrees south scope, where the warmed tropical air starts to drop.

Hot deserts are essentially found around the Tropics of Cancer and Capricorn. As air moves inland, it gets drained of dampness and precipitation drops. So the majority of the world's deserts are situated at scopes where cool, dry air advancing toward the shafts slides.

4 0

3 years ago