8. The cell wall<span> is the outer most covering of the </span>cell. ... The cell membrane<span> is present in almost all types of </span>cells<span>. The </span>cell wall<span> is present in bacteria, fungi, algae and plant </span>cell<span>.
9. </span><span>the spreading of something more widely.
10. </span><span>In </span>facilitated diffusion<span>, molecules only move with the aid of a protein in the membrane. In </span>simple diffusion<span>, molecules move down the concentration gradient but in </span>facilitated diffusion molecules move up the concentration gradient.
11. <span>a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one
12. </span>Differences<span>: </span>Passive Transport<span> (or Diffusion) moves ions from high concentration to low, using no metabolic energy. </span>Active Transport<span> moves ions from low concentration to high, using metabolic energy in the form of ATP. ... Both use ion channels to move ions across the cell membrane, in or out of the cell</span>
Answer:
The statement that is false is <u>metabolism is regulated largely by the nervous system.</u>
Explanation:
The metabolism reactions are controlled by the enzymes specific for each metabolic reactions. After a signal is generated, specific enzymes that detect the signal starts up the metabolic reactions.
When there is a need to stop a certain metabolic reaction, then the mechanism of feedback inhibition is used which stops the enzyme from carrying out any further reactions. Hence, the statement that metabolism is regulated largely by the nervous system is false.
Answer:
d. maintains all reactions in a pathway near the equilibrium of each.
Explanation:
In living organisms, control processes similar to the control processes used in technology take place in a purely formal way, one can look at living beings as cyber machines. Governance and regulation are fundamental principles of the organization of the living. According to the type of signal or transmission of information, four different types of biological control processes are distinguished:
- Neural
- Hormonal
- Differential gene expression in which substrate or substrate-like effectors are signaling agents.
- Feedback and forward control mechanisms in which the metabolites themselves act as direct signals to control their own degradation or their own synthesis.
Here's an idea:
"Do mice live longer when they are fed high-sugar diets." Collect two groups of young mice; one that will be fed low-sugar diets, and one will be fed high-sugar diets. Keep them on those respective diets for as long as they live. Research previous studies that have been done before and make a hypothesis as to what will happen in yours. Observe their health throughout the experiment. Make sure you count how long each mice lives. Determine an average count of years/months for both groups, and come to your conclusion.
No idea if this was the sort of answer you were looking for, but I hope this helps.
I found the missing part of this question.
Statisics on Human Population
<span><span>Year A.D. Number of People (in billions)
</span><span>1650 .50
</span><span>1750 .70
</span><span>1850 1.0
</span><span>1925 2.0
</span><span>1956 2.5
</span><span>1966 3.3
</span><span>1970 3.6
</span><span>1974 3.9
</span><span>1976 4.0
</span><span>1980 4.4
</span><span>1991 5.5
</span><span>2000 6.0
</span><span>2004 <span>6.4
</span></span></span>
The answer is it took 200 years more to double the population from 0.50 billion to 1.0 billion people. The year was 1850.
It was in 1925 when the population double again from 1.0 billion to 2.0 billion.
