Studying plant movement uncovered some specific behaviors such as irritability in plants as plants were observed to move in response to stimulus.
<h3>What are the characteristics of living things?</h3>
Living things are things that have life in them.
Plants and animals are living things.
The characteristics of living things include:
- movement
- respiration
- reproduction
- sensitivity or irritability
- excretion
- growth
- nutrition
Certain attributes of living things were not attributed to plants earlier such as sensitivity.
However, studying plant movement uncovered some specific behaviors such as irritability in plants as plants were observed to move in response to stimulus.
Learn more about plants at: brainly.com/question/3529377
Answer: A. Chemical signal
Explanation:
Chemical signal is the type of communication which coordinates actions between neighboring cells
.
This ability originated in single cells organisms and was essential for the evolution of multicellular organisms because after a cell receives a message, it is transferred across the plasma membrane and changes are brought about within the cell in response to this message.
Answer:
Enzymes help speed up chemical reactions in the human body. They bind to molecules and alter them in specific ways. They are essential for respiration, digesting food, muscle and nerve function, among thousands of other roles.
The hormone calcitonin, which is produced by the parafollicular or C cells of the thyroid, has the opposite effect on blood calcium levels as does PTH. I hope this helps! : )
The red blood cell does not have a nucleus. The lack of nucleus enables the rbc to have more room to contain hemoglobin which increases it's efficiency to carrying oxygen
