What do you think the term "ecological footprint" means?

Help me pls ASAP !!<br><br> What have experiments shown about the origin of life on Earth?

Snowcat [4.5K]

(1952) to be present on the early Earth and tested the chemical origin of life under those conditions.

5 0

3 years ago

Match the following items. 1. insertion inner, light-sensitive layer of the eye 2. sympathetic system point where a muscle is at

Sergeu [11.5K]

Answer:

1. Inner, light-sensitive layer of the eye. Retina

2. Point where a muscle is attached to the more movable part. Insertion

3. Outer, fibrous layer of the eye. Sclera

4. Translates sound vibrations into nervous impulse. Cochlea

5. Prepares the body for activity. Sympathetic system

6. Sense of balance. Semicircular canals

7. Coordinates our muscular movements. Cerebellum

8. Point where the muscle is attached to the less movable bone. Origin

9. Active when the body is resting. Parasympathetic system

10. In the brain stem, controls the activity of internal organs. Medulla oblongata

Explanation:

The retina is the internal layer of the eye. It receives the light from the exterior and transforms these stimuli into nervous stimuli, which travels to the brain to give an image.

The sclera is the outer layer of the eye. It protects the eye and keeps the eye's shape.

A muscle has an origin and an insertion. The first one is the part attached to the less movable bone and the second one to the more movable part. These two parts can be in different bones. When the muscle contracts, the bone attached to the insertion moves towards the origin of the muscle.

The cochlea and the semicircular canals are in the inner ear. The cochlea is the organ responsible for transforming the sound's vibrations into nerve impulses that will travel to the brain so that we can hear. In its interior, there are cells that have hairs, which move with the vibrations and transmit this message to the nervous system.

The semicircular canals are three and with liquid that moves as we move. The movement of this liquid moves hair cells that are in the canals. These hair cells inform our brain about our location in space and give us a sense of valance.

The cerebellum is part of the central nervous system. It involves the coordination of movements, learning new movements, and controlling them.

The sympathetic and parasympathetic nervous systems are part of the autonomic nervous system. The first one prepares our body for an emergency or an activity. It is the one that increases our respiratory frequency, our heart rate, dilates our pupils, makes us more alert, amongst other things. On the other hand, the parasympathetic system relaxes our body, slowing our heart rate, is involved in the digestion and the relaxation of our muscles. It activates, for example, after we eat.

The medulla oblongata is part of the brainstem. It controls involuntary actions such as heart rate, respiration, and vasoconstriction. As it controls these functions, it affects internal organs like the heart, lungs, arteries, etc.

5 0

3 years ago

Main features of Solar System, Main facts of solar system

iren [92.7K]

Answer:

The main features of the solar system:

The Sun is our nearest star.

The planets orbit the Sun.

The time taken to orbit the Sun increases with distance from the Sun.

Gravity keeps the planets in orbit around the Sun and the moons in orbit around their planets.

From the Sun, the order of the planets is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. You might need to be able to recall this in the exam.

The planets go around the Sun in slightly squashed circular elliptical orbits.

Pluto is classified as a dwarf planet or planetoid. It has a highly elliptical or eccentric orbit.

Main facts

The definition of a planet and a moon is fuzzy. ...

Comets and asteroids are leftovers. ...

The planets are all on the same “plane” and orbit in the same direction. ...

We're nowhere near the center of the galaxy. ...

But the Solar System is bigger than you think. ...

The Sun is hugely massive. ...

Explanation: (:

7 0

3 years ago

I have the sugar deoxyribose.<br><br> DNA only <br> RNA only<br> BOTH DNA and RNA

dsp73

Answer:

DNA only.

Explanation:

Both DNA and RNA are built with a sugar backbone, but whereas the sugar in DNA is called deoxyribose, the sugar in RNA is called simply ribose. The ‘deoxy’ prefix denotes that, whilst RNA has two hydroxyl (-OH) groups attached to its carbon backbone, DNA has only one, and has a lone hydrogen atom attached instead.

5 0

3 years ago

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Analyze the pyramid representing the energy flow through an ecosystem. Select the phrases that accurately describe the flow of e

saveliy_v [14]

In a typical energy pyramid, herbivores have more energy available to them than carnivores, tertiary consumers are fewer than secondary consumers, and soil organisms recycle nutrients.

<h3>Energy pyramid in the ecosystem</h3>

The producer forms the bases of the energy pyramid of any ecosystem. this is followed by the primary consumers, secondary consumers, tertiary consumers, and quaternary consumers respectively.

The population at each trophic level decreases as we move up, resulting in a form of a pyramid. Also, the amount of energy obtained at each trophic level decreases as we move upward.

Thus, one can effectively conclude that:

Herbivores have more energy available to them than carnivores.
There are fewer tertiary consumers than secondary consumers.
Soil organisms recycle nutrients but not energy back into the ecosystem.

More on the energy pyramid can be found here: brainly.com/question/2515928

#SPJ1

3 0

2 years ago