Answer:
a. commensalism is the correct answer.
Explanation:
By growing on the trunk or branch of a tree, a lichen gains height and exposure to sunlight for photosynthesis. The tree is not harmed by the lichen but does not benefit either. The relationship between the lichen and the tree is commensalism.
Commensalism is a relationship between two organisms where one organism gets benefits from other organisms without causing any harm or any damage from the relation as it one side symbiotic relation.
In this, we can see lichen is getting benefits from the tree.
for example, lichen is getting following benefits from the tree such as ( a lichen gains height and exposure to sunlight for photosynthesis.) and they are causing any harm to tree neither any benefits so this is a one-side symbiotic relation and thus the relationship is an example of commensalism.
<u>Answer:</u>
<em>C. many more generations can be studied using short-lived organisms</em>
<u>Explanation:</u>
<em>Fruit flies are organisms with a shorter lifespan.</em> Their average lifecycle takes about a week to develop from lava to an adult. This <em>characteristic of fruit flies are reason they are used for the genetic investigation. </em>
The <em>genetic characteristics of the organism</em> can be studied over a short time. The accuracy of the study can be increased as there will be more <em>data and statistics related to same experiment. </em>
<em>Long term effect as well as short term effect can be studied easily. </em>
Answer:
strato volcanoes also called composite volcanoes
D
Explanation:
they show interlayering of lava flow and pyroclastic materials which is why they are sometimes called composite volcanoes
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