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3 years ago

Which statement accurately describes the origin and expansion of the universe?

Biology

1 answer:

stira [4]3 years ago

3 0

ANSWER:

Cosmic background radiation is leftover thermal energy from the Big Bang best describes the origin and expansion of the universe.

EXPLANATION:

The "Big Bang Theory" is used to describe how the universe has begun.

The theory basically states that the "universe" began as a "single point" and then "expanded and stretched" and is expanding even today.

When the universe began, it was "hot tiny particles" mixed with heat and light and as it "expanded" and took up "more space", it cooled down and formed atoms.

The "best evidence of the big bang" is the radiation of cosmic background that was leftover when the first big bang explosion took place and began the universe.

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Cell Transport and Homeostasis essay

sergiy2304 [10]

Answer:

cell transport or membrane transport helps in the transport of solute molecules and ion across the plasma membrane and helps in maintaining homeostasis of these molecules in the biological system.

Explanation:

Homeostasis is very very important to maintain a steady body physiology and the maintenance of steady body physiology is highly significant because any type of disturbance in the homeostasis can leads various physiological abnormalities.

Various membrane transport process such as osmosis helps in the movement of water from high concentration region to the region of low water concentration until equilibrium is reached.Thus osmosis helps to maintain water homeostasis in our body.

By the same way glucose transporter maintain the homeostasis of glucose inside our body.

3 0

2 years ago

Name two conditions that must be met for a reliable Gram staining result.

Hatshy [7]

Answer:

The two important conditions that must be met before gram staining are-

1. The age of the culture should not exceed 24 hours.

2. Over heating, decolonization should be avoided.

Explanation:

Gram staining is a technique developed to distinguish the bacteria on the basis of the composition of the cell wall around the bacteria.

The gram stain is a sensitive technique so must be performed carefully. The precautions should be taken to avoid any error while gram staining that is-

1. Age of the culture- The culture should be freshly prepared just 18-24 hours before the experiment as above 24 hours bacteria lose their ability to retain the color so one would not be able to differentiate between the cultures.

2. While performing the experiment one should avoid overheating and decolorization with ethanol as both the factors lead to the loss of crystal violet stain from the cell and they take pinkish color after safranin staying.

4 0

3 years ago

Which adaptation makes bipedalism possible?

amid [387]

An adaptation that makes bipedalism possible is the need to get around. If your slithering on the ground, you could get diseases, or get hurt.

7 0

3 years ago

Read 2 more answers

How are increased CO2 levels and increased temperatures affecting plant growth in the two experiments shown?

wlad13 [49]

High CO2 levels cause plants to thicken their leave ,which could worsen climate change effect researchers says.

plant scientists observed that when CO2 levels increase in the atmosphere most plants do unusual , they thicker their leave

germination increase in high temperature up to the point

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2 years ago

How do you think the idea of sustainability influences the work of foresters?

Nady [450]

It’s funny because the concept of sustainability is thought to come from field of forestry. Around the year 1700, Carl von Carlowitz described the concept of sustainable forestry.

6 0

2 years ago