Is this a question or a statement?
A controlled variable is a commonly used term in the field of scientific research, where finding evidence to support a theory is rarely straightforward. In the case of the natural sciences, some research features are constant, but the majority of these have inconsistencies. These inconsistencies are known as variables.
Answer:
1. P
2.P
3.R
4.R
.5.R
6.B
7.R
8..P
9.P
10..P
11.R
12.P
13.P
14.R
15.R
16.N
17.N
18.P
19.R
20.B
21. R
Explanation:
Photosynthesis is a process in which carbondioxide gas react with oxygen in the presence of solar radiation produces oxygen and glucose. oxygen is released in the atmosphere while glucose s stored in different part of plant body while on the other hand in respiration, glucose is broken down in the presence of oxygen produces carbondioxide, water and energy in the form of ATP.
Answer: no body cavity—acoelomates; body cavity not completely lined with mesoderm—pseudocoelomates; body cavity completely lined with mesoderm—coelomates
