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ruslelena [56]
3 years ago
13

There are no billion-year-old main-sequence o- or b-type stars. a. True b. False

Biology
1 answer:
Nataly [62]3 years ago
7 0
True I’m pretty sure! Hope I helped
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Who was the individual whose three principles led to a better understanding of the
andreev551 [17]

Answer:

Nicholas Steno

Explanation:

Nicholas Steno who was a Catholic priest establish relationship between sedimentary rock layers otherwise called stratigraphy.

Stratigraphy is a branch of geology that deals with the study of rock layers. He established theoretical law of stratigraphy by introducing law of superimposition, principle of original horizontality and the principle of lateral continuity in 1669 work of fossilization of organic matter sediments.

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3 years ago
A 50-year-old male presents with hypotension, hypoxemia, and tracheal deviation to the left. tests reveal that the air pressure
Aneli [31]
<span>In this case, the nurse would believe that the patient was experiencing Tension pneumothorax. Tension pneumothorax is the build up of air over time in a pleura space. It is generally caused by a laceration in the lung which lets air pass into the pleura space but then get stuck there. It presents a pressure which makes ventilation difficult, it cause the same effects as a one way valve.</span>
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3 years ago
9. a) How does hydrogen bonding help the transport of water in plants?
grigory [225]

Answer:

Water has a high Cohesion because of Hydrogen bonding. This is important as transport of water in the Xylem in plants relies on water being pulled up. Cohesion also gives the water a high surface tension, allowing small organisms, such as Pond Skaters, to walk along it.

Explanation:

Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions.

Plants obtain the hydrogen they need from water molecules. Don't try to feed your plant hydrogen gas -- your plant wouldn't know what to do with it if you did. As long as they have water, plants can readily obtain all the hydrogen they need. :)

6 0
3 years ago
The major organs which control acids and bases in the body are:
sertanlavr [38]

Answer:

1. kidneys 2. Lungs 5. Pancreas

Explanation:

The body's balance between acidity and alkalinity in the human body is regarded as the acid-base balance which is measured on the basis of the pH and the concentration of carbon dioxide and bicarbonate in the blood. The organs that controls acid-base balance are lungs, kidneys and pancreas. Theses organs control blood pH by releasing carbon dioxide from the lungs because it is a waste product slightly acidic in nature and excreting excess of acids and bases from the body.

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3 years ago
What are some differences between the "Steady State" and "Big Bang" theories?
Alex17521 [72]

Answer:

The major difference between the Big Bang theory and the steady state model is that the the big bang theory comes with the belief and idea that all the matter were created as a result of one big bang explosive beginning.

The steady state model matter however talks about matter being created at a steady rate through a specified time. The model also talks about the process being continual and is still happening till today.

7 0
3 years ago
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