Answer:
Radioactive labeling is a procedure used to monitor the path followed by a chemical element within a biological system to demonstrate the source.
Hypothesis:
The free oxygen produced during photosynthesis comes from water.
Procedure.
Single-celled algae were placed in four petri dishes containing carbon dioxide, glucose dissolved in Water.
In each box the oxygen was radioactively marked.
1 petri dish with CO2 marked. Experimental groups
2 petri dish with H2O marked. Experimental groups
3 petri dish with Glucose marked. Experimental groups (control)
4 petri dish with CO2 + H2O + Glucose, all marked. (control).
Soil can cause a natural disaster by soil erosion
Answer:
Another type of evidence for evolution is the presence of structures in organisms that share the same basic form. For example, the bones in the appendages of a human, dog, bird, and whale all share the same overall construction ([Figure 2]). That similarity results from their origin in the appendages of a common ancestor.
Explanation:
Hope it helps :)
Pls mark brainliest :P
Answer:
i would just say the average amount of time it takes is about 5 mins and 30 secs. well it depends on the temperature of the water as well. if the water is cold it will boil faster (and its weird but true.). but yea maybe the time it took 7:05 it was luke warm water. i hope this helps.
Explanation:
i explained it? eh.
Meristems are cell divisions. Trees grow by the cell divisions
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