Plant cells have cell walls and animal cells do not because the plant cell needs it for its activities.
Answer:
Paget's disease
Explanation:
It is a chronic condition of bones understood as a disorder of the normal bone remodeling and recycling processes.
Paget's disease results in irregular thickening of bone tissue due to new bone tissue gradually replaces old bone tissue.
Paget's disease commonly affects pelvis, skull spine and legs, causing pain and deformity in them.
It also produces broken bones, hearing loss pinched nerves in the spine due to this disease increases with age.
Answer:
<u>In the mitochondrial matrix</u>
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Explanation:
The mitochondria is an organelle within the cytoplasm of the cell. It consists of an outer membrane, inner membrane, and matrix containing a gel-like substance. During aerobic respiration in mitochondria, cells break down sugars in the form of glucose into 
(carbon dioxide) and 
(water) to obtain energy in the form of ATP or adenosine triphosphate.
aerobic respiration:
C6H12O6+ 6 O2 → 6 CO2 + 6 H2O + ≅38 ATP
(glucose) (oxygen) (carbon dioxide) + (water)
The Kreb's cycle involves several enzymatic reactions, where pyruvate derivatives obtained from glycolysis, are reduced and oxidized to harvest energy as ATP.
All of the above is the answer
<span>If an animal learns to use a tool in one way and then is presented with a new situation in which it applies the tool, the animal is demonstrating
a. imprinting.
b. operant conditioning.
c. classical conditioning.
d. insight learning.</span>
