1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
LekaFEV [45]
3 years ago
12

In ferns the spores develop on

Biology
1 answer:
Natalija [7]3 years ago
8 0
They develop on the undersides of leaves.
You might be interested in
How important is liquid water to our survival on planet earth
sammy [17]

Answer:

Very

Explanation:

If we did not have liquid water we would die lol

5 0
3 years ago
Read 2 more answers
Excercise have no positive effects on the nervous system true or fale
Oksana_A [137]
It’s false bc it has a variety of positive effects
6 0
3 years ago
Areas with more rainfall will have the same rate of soil formation as areas with less rainfall. Please select the best answer fr
andrey2020 [161]

Answer:

False

took the review on edg

3 0
2 years ago
Read 2 more answers
3. The human body has devised an excellent method to keep the body pH under control. a. What principle underlies the constant pH
kumpel [21]

The normal blood pH for adult humans is 7.40, and this pH value is vigorously defended at normal body temperature

Acid base Homeostasis is the method by which body keeps a constant ph
pH is kept under check via different systems
1. Chemical system :bicarbonate buffer system(explained below )
Respiratory component :
2. Respiratory Component: The second line of dense is rapid consisting of the control the carbonic acid concentration in the ECF by changing the rate and depth of breathing by hyperventilation or hypoventilation. This blows off or retains carbon dioxide (and thus carbonic acid) in the blood plasma as required

3.Metabolic component : third line of defense is slow, best measured by the base excess,eand mostly depends on the renal system which can add or remove bicarbonate ions to or from the ECF.Bicarbonate ions are derived from metabolic carbon dioxide which is enzymatically converted to carbonic acid in the renal tubular cells.There, carbonic acid spontaneously dissociates into hydrogen ions and bicarbonate ions.When the pH in the ECF falls, hydrogen ions are excreted into urine, while bicarbonate ions are secreted into blood plasma, causing the plasma pH to rise.The converse happens if the pH in the ECF tends to rise: bicarbonate ions are then excreted into the urine and hydrogen ions into the blood plasma.




Buffers usually consist of a weak acid and its conjugate base; this enables them to readily absorb excess H+ or OH–, keeping the system’s pH within a narrow range.

Maintaining a constant blood pH is critical to a person’s well-being. The buffer that maintains the pH of human blood involves carbonic acid (H2CO3), bicarbonate ion (HCO3–), and carbon dioxide (CO2). When bicarbonate ions combine with free hydrogen ions and become carbonic acid, hydrogen ions are removed, moderating pH changes. Similarly, excess carbonic acid can be converted into carbon dioxide gas and exhaled through the lungs; this prevents too many free hydrogen ions from building up in the blood and dangerously reducing its pH; likewise, if too much OH– is introduced into the system, carbonic acid will combine with it to create bicarbonate, lowering the pH.
Example: Antacids, which combat excess stomach acid, are another example of buffers.


ECF =Extra cellular fluid




5 0
2 years ago
Why is genetic variation important? Select all that apply:
Sladkaya [172]

Answer:

Genetic variation in a group of organisms enables some organisms to survive better than others in the environment in which they live. Organisms of even a small population can differ strikingly in terms of how well suited they are for life in a certain environment.

Explanation:

Genetic variations are important because a diverse gene pool is good for long-term survival of a species since the environment is always changing, so the diversity of DNA offers the most fit of the species a better chance of surviving because they are most adapted to the constantly changing environment.

7 0
1 year ago
Other questions:
  • Jill is 5 years old. She has been diagnosed with ADHD and shows signs of learning disabilities. Her doctor suggests that Jill's
    11·1 answer
  • Why do constellations in the night sky change seasonally? A. Earth rotates around its axis. B. Earth revolves around the sun. C.
    13·1 answer
  • About how many cells are in an adult human body
    14·2 answers
  • Provide an example of maintaining homeostasis at the system level.
    8·1 answer
  • Imagine you are listening to a speech by a member of the National Consumers’ League. Which issue do you think they are protestin
    12·2 answers
  • Which of the following might be an individual characteristic in an impression?
    5·2 answers
  • There is evidence from historical and genetic measures that supports the division of modern humans into subspecies. There is evi
    8·2 answers
  • Binomial nomenclature refers to the method of naming species
    6·1 answer
  • Which THREE characteristics do mechanical waves and electromagnetic waves share?
    15·2 answers
  • The following reaction is of photosynthesis:
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!