C- the heart pumps the blood through the arteries and into the extended vascular system.
<span>The hypothesis was that the cause of stomach-ulcers
is Helicobacter pylori and not spicy food. Marshall and Warren were able to
prove that the main cause of peptic ulcers was the bacterium Helicobacter
pylori instead of the spicy foods and stress, which physicians believed were
the main causes of peptic ulcers at the time.</span>
Ferns developed after mosses appeared.
Answer:
Mitochondral
Explanation:
Mitochondria were made before ribosomes
The correct option is (b) RCHO
The general formula for an aldehyde is RCHO.
<h3>What is an aldehyde?</h3>
- An organic molecule with the functional group RCH=O is known as an aldehyde. The functional group alone (without the "R" side chain) can be categorized as a formyl group or as an aldehyde.
- Aldehydes are widespread and have significant functions in both the technological and biological worlds.
- Aldehydes have a carbon center attached to oxygen via a double bond, hydrogen via a single bond, and a third substituent—usually carbon or, in the case of formaldehyde, hydrogen—by a single bond. It's common to refer to the center carbon as being sp2-hybridized. Aldehydes belong to a polar category.
Learn more about the aldehyde with the help of the given link:
brainly.com/question/28259216
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