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bixtya [17]
3 years ago
15

Perry designed an experiment with a balloon and hose. The steps of the experiment are listed below.

Biology
1 answer:
fgiga [73]3 years ago
6 0

Answer:

expansion of the universe makes galaxies move farther apart

Explanation:

The universe becomes less dense as the universe expanses. Draw dots on a balloon and watch them as the balloon fills with air.

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Find the density of an object that has a mass of 22.3g and a volume of 136.7cm3.
andre [41]

Answer:

0.1631309437 g/cm^3

Explanation:

The formula for density is ρ=\frac{m}{V} (where m represents mass, and V represents volume).

With this formula, we can calculate the density of the object:

ρ = \frac{22.3g}{136.7cm^3}

=0.1631309437 g/cm^3

Hope this helps :)

8 0
3 years ago
Which of the following sequences represents the hierarchy
balandron [24]

Answer:

4) molecule, cell, organ system, population, ecosystem, biosphere

Explanation:

Various biomolecules such as carbohydrates, proteins, lipids, etc. together make the cells. Cells are the structural and functional units of life. A group of cells destined to perform specific functions makes tissues and various specific tissues together make an organ.

An organized group of tissues and organs that work cooperatively to perform a specialized set of functions is called an organ system. For example, the digestive system includes organs involved in the breakdown of nutrients.

A group of organisms of the same species that live in a defined geographic area at the same time make a population. Ecosystem refers to an interacting system including a biotic community and its nonliving, physical environment.  The biosphere includes all of the parts of Earth where life forms exist and include the atmosphere, the hydrosphere and the lithosphere.

7 0
3 years ago
What are the three effects or impacts of climate change ?
natali 33 [55]

Answer:

People, fossils fuels,land,living things

Explanation:

7 0
2 years ago
According to the all-or-nothing principle, Select one: a. the amount of time a neuron must "rest" in between firing episodes is
Brilliant_brown [7]

Answer:

<em>The correct option is d) once the electrical impulse reaches a certain level of intensity (its threshold), it fires and moves all the way down the axon without losing any intensity.</em>

Explanation:

In the field of biology, the all-or-nothing law can be described as a principle which focuses on the strength with which a nerve or muscle fibre responds to a particular stimulus, this strength being independent of the strength of the stimulus. The functioning of the impulse is just like the trigger of a gun. The more the force of a stimulus, the more will be the intensity of the nerve impulse.

4 0
2 years ago
Que animales no respiran por las branquias​
pantera1 [17]
Peces, algunos anfibios, moluscos, artrópodos, gusanos
5 0
3 years ago
Read 2 more answers
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