Biology 9th grade need help asap please
The sides or backbone of DNA is made up of what two molecules? (green in the diagram below)

Multiple choice answers
-Sugar-Nitrogen Base
-Sugar-Phosphate
-Phosphate-Nitrogen Base
-All sugar molecules

Answer:

The answer is a

Explanation:

the answer is a because as u add more ice to the icewater the water gradually increases in cold temputere and decrease in hot temperature.

Answer:

Explanation:

D. Both A and B

Answer: They are called Moraines

Explanation: A glacier is a large body of ice originating from land that constantly moves slowly over land. It occurs in almost all parts of the world and makes up about 3/4 of fresh water all over the world.

Glaciers constantly move on land and they do this under their own weight.

As a glacier moves across land, it pushes soil and rocks in front of it and to the sides of it.

The resulting hill formed as a result of this soil movement is called a Moraine.

A moraine is sometimes referred to as a glacial till. It is an accumulation of materials (usually soil and rock) left behind by a moving glacier.

Answer:

the sun

Explanation:

Answer:

Invertebrates can have bilateral or radial symmetry, or they can be asymmetrical. Bilateral symmetry means that the animal is arranged in the same way on both sides. Radial symmetry means the body parts are arranged in a circle around a central point.

Answer:

C

Explanation:

Answer:

Ion pumps can be distinguished from ion channels on the basis that ion pumps actively transport ions against a concentration gradient, while ion channels allow ions to passively flow down a concentration gradient.

Explanation:

Answer:

Several differences allow the human to walk erect on two legs with a striding gait rather than move in a knuckle-walking fashion like the gorilla. In the pelvis these differences include ...

Answer:

With no water supply, all vegetation would soon die out and the world would resemble a brownish dot, rather than a green and blue one. Clouds would cease to formulate and precipitation would stop as a necessary consequence, meaning that the weather would be dictated almost entirely by wind patterns.

are food will die then the animals will die then we would die and the earth wouldn't be green no more it will be brown and bry there will be no clouds ether or grass

Answer:

B.

Explanation:

When you touch something the sensory nerves carry it to the brain while your motor nerves tell you to touch it. So being carried to and from. I also got it right on the quiz.

Sensory nerves carry information to the CNS, and the motor nerves carry information away from the CNS. Therefore, the correct statement is option B.

The central nervous system (CNS) includes the brain and the spinal cord responsible for processing information received from peripheral nervous system (PNS) to generate appropriate responses. The brain is the most complex organ of the CNS, carries various functions, including sensation, perception, movement, etc.

Sensory nerves transmit information from sensory receptors, such as those in the skin, muscles, etc. to central nervous system (CNS) and sensory nerves are activated by various types of stimuli.

Motor nerves transmit signals from the CNS to muscles, and other effectors throughout the body. These signals are responsible for activation of muscle contractions, produce movements, and other responses.

Therefore, sensory and motor nerves both work together to perform physiological functions where sensory nerves carry information to the CNS, and the motor nerves carry information away from the CNS.

Learn more about the central nervous system here:

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Answer:

Air

Explanation:

Air.

Why? Because air has a much lower specific heat capacity (Heat capacity - Wikipedia) per unit mass than water. Also, air is dispersed as a gas so that in any given volume the mass of air that would fill it is only a fraction of the mass of water that would fill the same volume. Take these two factors into consideration and you see that the amount of energy it takes to raise the temperature of a volume of air by one degree is minuscule compared to the amount of energy it takes to heat the same volume of water by one degree.

The one thing that is more challenging about air is actually getting the energy into it. Water is densely packed, whereas air molecules are much more widely separated, so that presents a heat conductivity challenge. However, if we’re talking about equipment specialized for heating air (i.e. a fan forcing air over heated coils) versus equipment specialized for heating water (flat plate, coils, pumps or no pumps, whatever), energy added at the same rate to each will heat an equivalent volume of air to a greater extent (i.e. raising temperature more quickly) that it will water.

Answer:

1. carbon dioxide

2.atp

3. oxygen

4. glucose

Explanation:

Answer:

1. Aqueous humor.

2. Ciliary muscles.

3. Cone.

4. Cornea.

5. Iris.

6. Optic nerve.

7. Photoreceptor.

8. Retina.

9. Rod.

10. Sclera.

11. Vitreous humor.

Explanation:

A sensory system can be defined as components of the central nervous system (CNS) which comprises of the brain, neural tissues or pathways and sensory neurons responsible for sensory functions, perception and processing sensory informations such as sound, light, heat, etc.

Basically, the central nervous system (CNS) interprete the neural signals that are generated from stimuli that are detected by the sensory system. The five (5) main sense organs in the sensory system are: skin, tongue, ears, nose and the eyes.

An eye can be defined as a specialized organ of sight with the capability to receive visual images that are subsequently transduced into neural signals and relayed to the brain for processing and interpretation. Some of the components of the human eye matched with their description are;

1. Aqueous humor: a transparent liquid which is located between the cornea and iris.

2. Ciliary muscles: muscles attached to the lens to change its shape.

3. Cone: a photoreceptor cell which functions best in bright light. It detects color.

4. Cornea: the transparent portion of the sclera at the front of the eye.

5. Iris: a special part of the choroid layer composed of colorful tissue.

6. Optic nerve: the nerve connecting the eye to the brain.

7. Photoreceptor: specialized cells located in the retina that receive light images.

8. Retina: a delicate light-sensitive membrane covering the inside of the eyeball.

9. Rod: a photoreceptor cell which is sensitive to dim light, but detects no color.

10. Sclera: a fibrous material surrounding the eye to give it shape.

11. Vitreous humor: a transparent jellylike substance filling the eyeball.

Answer:

1. A transparent liquid which is located between the cornea and iris - aqueous humor

2. Muscles attached to the lens to change its shape - ciliary muscles

3. A photoreceptor cell which functions best in bright light, it detects color - cone

4. The transparent portion of the sclera at the front of the eye - cornea

5. A special part of the choroid layer composed of colorful tissue - iris

6. The nerve connecting the eye to the brain - optic nerve

7. Specialized cells located in the retina that receive light images - photoreceptor

8. A delicate light-sensitive membrane covering the inside of the eyeball - retina

9. A photoreceptor cell which is sensitive to dim light, but detects no color - rod

10. A fibrous material surrounding the eye to give it shape - sclera

11. A transparent jellylike substance filling the eyeball - vitreous humor

Answer:

1. A low- pressure weather system can cause a thunderstorm to develop.

2.Thunder is caused by lightning. When a lightning bolt travels from the cloud to the ground it creates a channel. Once the light is gone the air collapses back in and creates a sound wave that we hear as thunder.

3. One condition that is necessary for a thunderstorm include warm air and moisture.

4. The dangers of a blizzard include getting lost in the snow and freezing to death.

5. In my opinion, a hurricane would be the most difficult storm to face because hurricanes can severely impact your life due to their damage.  For example,winds can damage houses, trees, and any other property. Even if your home is safe, flooding aftermath can occur. When homes are destroyed, people may have to rebuild homes and towns.

Many key ecosystem services provided by biodiversity, such as nutrient cycling, carbon sequestration, pest regulation and pollination, sustain agricultural productivity. Promoting the healthy functioning of ecosystems ensures the resilience of agriculture as it intensifies to meet growing demands for food production.

Answer:

breathing treats that add moisture and medicine to the lungs

Explanation:

Answer:

The Sun causes tides just like the Moon does, although they are somewhat smaller. When the earth, Moon, and Sun line up—which happens at times of full Moon or new Moon—the lunar and solar tides reinforce each other, leading to more extreme tides, called spring tides.

Answer:

absorb heat from the sun

Explanation:

Greenhouse gases are specific type of gases that possess the ability to trap and emit heat/thermal energy in the atmosphere. They are able to do this because of their structure. Examples of greenhouse gases are carbon dioxide (CO2), methane (CH4), chlorofluorocarbon (CFC) etc and are mostly produced via anthropogenic activities.

Greenhouse gases are therefore, produced both artificially (by burning fossil fuels) and naturally and functions to absorb heat from the atmospheric surroundings.

Answer:

absorb heat from the sun

Explanation:

Greenhouse gases absorb heat from the sun.

Answer:

the answer is c

i did this test before in 8 grade

Answer: Enzymes

Explanation:

Enzymes are those proteins which participate in a chemical reaction without being consumed in the reaction. These enzymes work as a catalyst which speed up the rate of the chemical reaction. The enzyme is responsible for converting the substrate into a product. Pepsin is an enzyme present in the stomach it is activated by hydrochloric acid it is a peptic enzyme which converts proteins into peptones, trypsin and chymotrypsin are the enzymes secreted by the pancreas and it is responsible for digestion of proteins.

Answer:Mistletoe is a parasite – it steals water and nutrients from trees. Technically, it is a “hemiparasite”, which means that it can generate some of its own resources through photosynthesis – it just needs that energetic kick from the sun to fuel the biological siege and subsequent invasion of the tree

Explanation:

Answer:

metabolism is the process by which your body converts what you eat and drink into energy.

OR

Metabolism is the chemical reaction in body cells that change food into energy.

specific proteins in the body control the chemical reactions of Metabolism.

Answer:

True! :) Also, reminder drink some water and relax. <3

Explanation: