Answer:
The correct answer is -
A. 2.6 × 10^9 years.
B. two half-lives.
Explanation:
According to the question, the half-life of potassium-40 is, 1.3 × 10^9 years, which means it takes 1.3 billion years to decay or disintegrate half of the initial amount of the potassium.
The half-life of K-40 = 1.3 × 10^9
The number of half-life, => (1/2)^2 = 1/4 (25% =1/4)
n = 2
number of half life = two
the time it takes = n*half lifetime
= 2 *1.3 × 10^9
=2.6 × 10^9 years.
Answer:
It will decrease their ability to exchange air into and out of the lungs, decreasing gas exchange.
Explanation:
Muscular dystrophy is a rare genetic disease of the skeletal system which occurs early in childhood. Other symptom of muscular dystrophy include impaired learning,muscle stiffness and pain. The rib cage protects and houses the lungs. When the muscle of the rib cages gets impaired then it affects how gases are inhaled and exhaled.
1. With respect to oxygen requirements, an <u>aerobe </u>can use gaseous oxygen and possesses enzymes to process toxic oxygen products.
<h3>
What are enzymes?</h3>
Proteins called enzymes aid in accelerating our bodies' chemical reactions, or metabolism. Some compounds are created, while others are broken down. Enzymes are a component of all life. Enzymes are created by our bodies spontaneously.
2. Expanding on this classification, an <u>obligate </u>aerobe cannot grow without oxygen.
3. Still other organisms, called<u> facultative anaerobes</u>, metabolize by aerobic respiration but can adapt to anaerobic environments.
A facultative anaerobic organism is one that can switch from aerobic respiration to fermentation in the presence of oxygen to produce ATP.
For more information regarding enzymes, visit:
brainly.com/question/1596855
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The part of the neuron that carries impulses away from the cell body is the axon. Think Axon, Away.
1) occluding junctions
2) anchoring junctions
3) communicating junctions
Occluding junctions do not totally seal the space between cells and the resulting permeability varies greatly. I would say anchoring junctions are most likely with one of the other 2 junctions being least permeable.
