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3 years ago

Photosynthetic cyanobacteria created what important component of the atmosphere?

Biology

1 answer:

horrorfan [7]3 years ago

7 0

C because oxygen was a byproduct of photosynthesis and proved to be EXTREMELY important in the atmosphere.

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From what kind of cross a mule is produced?

insens350 [35]

Answer:

Mule is produced from a hybrid cross.

Explanation:

A mule is the offspring which is produced by crossing or mating of male donkey with female horse.

Where the male donkey is called Jack and female horse is called mare.

The offspring produced as a result is Mule.

The gender of Mules may be male or female but consists of 63 chromosomes.

But such produced Mules are sterile.

4 0

2 years ago

Air that enters the pleural space during inspiration but is unable to exit during expiration creates a condition called

azamat

Air that enters the pleural space during inspiration but is unable to exit during expiration creates a condition called Pneumothorax.

<h3>What is Pneumothorax?</h3>

An abnormal buildup of air in the pleural space between the lung and the chest wall is known as a pneumothorax. Shortness of breath and quick, acute, one-sided chest discomfort are common symptoms . A tension pneumothorax happens when an area of injured tissue forms a one-way valve, increasing the amount of air in the gap between the chest wall and the lungs. As a result, there may be an oxygen deficiency that worsens with time and low blood pressure. Obstructive shock is a type of shock that results from this and can be lethal if left untreated. A pneumothorax can very infrequently affect both lungs. Although the term "collapsed lung" can also refer to atelectasis, it is frequently used to describe it.

Learn more about Pneumothorax with the help of the given link:

brainly.com/question/27974865

#SPJ4

4 0

1 year ago

I need help in biology questions please G10?

Svetlanka [38]

Answer:

ok where is it

we can help only if there is something attached

7 0

3 years ago

Read 2 more answers

When a living organism dies, it stops taking in new carbon. Thus, as the radioactive carbon-14 decays, the ratio of carbon-12 to

Alexxandr [17]

Answer: The fossil is 11459 years old.

Explanation:

Half-life of carbon-14 = 5700 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{5700\text{years}}$

$k=1.21\times 10^{-4}\text{years}^{-1}$

Now we have to calculate the age of the sample:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}\text{years}^{-1}
t = age of sample = ?
a = let initial amount of the reactant = 100 g
x = amount decayed = 75 g
a - x = amount left after decay process = 100 - 75 = 25 g Now put all the given values in above equation, we get
[tex]t==\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{25}$

$t=11459years$

The fossil is 11459 years old.

4 0

3 years ago

What are the 4 nitrogenous bases found in DNA and what are their appropriate pairings?

Debora [2.8K]

Answer:

DNA has four nucleobases: adenine, thymine, guanine, and cytosine. The nucleobases in a DNA strand have preferred partners to form hydrogen bonds with. Cytosine pairs with guanine, and adenine pairs with thymine. These are the base pairing rules that allow DNA replication and protein synthesis to happen.

Explanation:

hope this helps <3

3 0

2 years ago