option 2 seems appropriate for me!
Answer:
The right answer is "2.30 g/ml".
Explanation:
Given:
Volume,
= 17 ml
Mass,
= 39 g
Now,
The density will be:
= 
By substituting the values, we get
= 
= 
The "soil type" is an example of abiotic factor to an earthworm. Abiotic factors are the non-living factors which influence the earthworm present in soil. Thus, the correct option is A.
<h3>What is Abiotic factor?</h3>
Abiotic factors are the non-living components of the environment that affect living organisms and the functioning of the ecosystems as a whole.
Soil type is an abiotic factor for the earthworm present in it. The soil helps an earthworm to collect food and hence in increasing its population. Soil is made up of the rocks, minerals and other non-living particles.
Therefore, the correct option is A.
Learn more about Soil here:
brainly.com/question/224605
#SPJ1
Answer:
Option C
Explanation:
A control group with in an experiment is the subject which is not exposed to any treatment just in order to compare the result of treated group with non-treated group.
Here in this experiment, showers which are receiving water containing mildew represents the control group as the mildew growth on such showers will be compared with the treated group i.e the showers which are sprayed to reduce the growth of mildew.
Hence, Option C is correct
