"what evidence exists that some of the asteroids were geologically active in the distant past"

1 answer:

4 0

The geological activity of a celestial body like a planet, satellite or asteroid can be determined by looking at the surface features like the presence of a valley like terrain or plains or basins created by the lava flow. The presence of heavy elements like uranium, lead, iron and gold on the surface also indicate that the body once spewed out lava since these are found within the internal core of the body. Ceres, an asteroid has these elements present on its surface which hints at the presence of an active geological process in the past.

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What Contains tube-like structures that carry water and nutrients

Zigmanuir [339]

I think the answer is the Endoplasmic Reticulum

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3 years ago

Considering the body’s organization from atoms to organ systems, in which level of organization are proteins like collagen? Desc

storchak [24]

Answer:

According to the levels of organization in the body, the level of organization in which proteins, like collagen, are found is the molecular level, allowing the structural support and the performance of other essential functions.

Explanation:

Proteins are biological macromolecules, polymers of units called amino acids. These molecules belong to the molecular level of organization in living organisms.

The level of organization where proteins are found allows them:

Form an essential part of cells.
Contribute to the construction of tissues and organs.
Participate in metabolic reactions, as enzymes.
Defense of the organism, in the form of antibodies.
Regulation of vital functions, forming hormones.

Other functions of proteins are to integrate the cell membranes and perform transport function, to form receptors and to be an energy reserve.

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3 years ago

If an object turns but maintains the same speed,has its acceleration changed?explain

Andreas93 [3]

Acceleration is defined as the rate of change of velocity
Since velocity is a vector, it has both speed and direction.
So, if the object is travelling in a straight line at a constant speed, then it will not be accelerating. Both Magnitude and direction are constant.
However, if the object is travelling in a circle at a constant speed, then it'll be accelerating. An Object going in a circle is constantly changing it's direction, which means velocity is changing, so there is an acceleration caused by a net force.
Hope this Helps :)

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3 years ago

The diploid number of chromosomes in humans (homo sapiens) is 46 and the diploid number of chromosomes in rice (oryza sativa) is

Mrac [35]

For humans, the diploid chromosome number equation is 2n = 46 because humans have two sets of 23 chromosomes The diploid chromosome number varies by organism and ranges from 10 to 50 chromosomes per cell.

<h3>What is Mitosis?</h3>

Mitosis is a type of cell division that occurs in somatic or body cells. In mitosis, and a cell undergoes division to produce two daughter cells each with the same number of chromosome as the parent cells.

Mitosis produces diploid cells and diploid cells are cells that have the same number of chromosomes as the parent cell.

Thus, The diploid chromosome number varies by organism and ranges from 10 to 50 chromosomes per cell.

To learn more about chromosomes click here:

brainly.com/question/296477

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2 years ago

What experimental technique or instrumentation was used to determine kinesin step size?

Keith_Richards [23]

Answer:

Optical trapping interferometry

Explanation:

Optical trap is a device which can measure forces or dielectric objects of magnitude of Pico newton or micron.

In this, a high focused light beam is used to view objects under the microscope. It is highly used in molecular and cell biology and biophysics

This methodology has been adapted to sort lipids at cell surface and in activation of kinase in the dendritic cells

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3 years ago