Answer: The earthworm contracts and extends in its movement, but the nematode moves side by side.
Explanation:
NOTE: By mode of location, we mean the way it moves.
The skin of a nematode is very unusual in that it secretes a thick outer cuticle which is both hard and flexible. And this cuticle makes it sustain a side by side mode of location. The closest thing a roundworm has to a skeleton is its cuticle and it uses it as a support and balance point for movement. Long muscles lie just underneath the epidermis and are all aligned longitudinally along the inside of the body, so the nematode can only bend its body from side to side, not contract or extend itself.
Whereas the earthworm extends and contracts as its mode of location.
An earthworm moves by using its two different sets of muscles: circular muscles for looping around each segment, and the longitudinal muscles for running along the length of the body.
The contraction of the circular muscles make the earthworm stretch becoming longer and thinner. The earthworm uses its longitudinal muscles to contract and thus becomes shorter and wider or it bends from one side to the other, pulling the body forward in the process. The earthworm withdraws the front setae and uses its rear setae to anchor itself at the back. Then the earthworm uses its circular muscles to lengthen and push itself forward again.
The answer is c............................................
This is true that mixed-phase clouds over the southern ocean as observed from satellite and surface-based lidar and radar.
A three-phase colloidal system made up of water vapor, ice particles, and coexisting supercooled liquid droplets is represented as mixed-phase clouds. At all latitudes, from the arctic regions to the tropics, mixed-phase clouds are common in the troposphere. Due to their extensive nature, mixed-phase processes are crucial to the radiative energy balance on both a regional and global scale, precipitation generation, cloud electrification, and the life cycle of clouds.
But despite decades of theoretical research and observation, our knowledge and understanding of mixed-phase cloud dynamics are still lacking. The representation of mixed-phase clouds in numerical weather and climate models is famously challenging, and it is still challenging to describe them in theoretical cloud physics.
To know more about mixed-phase cloud refer to: brainly.com/question/8050224
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Answer: It is the result of a mixture of radiation from many independent sources, such as stars and galaxies.
Microwave background radiation is a form of electromagnetic radiation that is present in the whole universe and completely fills it. In fact, it is the leftover radiation from the Big Bang that occurred 400,000 years before the events related to this cosmic radiation.
Its frequency belongs to the microwaves range and is one of the main demonstrations of the of the Big Bang theory model.
