1. about 200 years ago, jan baptista van helmont did experiments on the nature of photosynthesis. he wanted to know where growing plants get the materials necessary for increases in size. he planted a tree seedling weighing 5 pounds in a barrel filled with 200 pounds of soil. he watered the tree regularly. five years passed. then van helmont weighed the tree and the soil. the tree weighed 169 pounds, 3 ounces. the soil weighed 199 pounds, 14 ounces. because the tree gained so much weight and the soil lost so little, he concluded the tree had gained all of its additional weight by absorbing water he had added to the barrel. given what you know about biological molecules, why was he misguided? knowing what you do about photosynthesis, what really happened?
2. while gazing into an aquarium, you observe bubbling from an aquatic plant. what is happening?

1. Carbon forms the bulk of the weight not water

2. Oxygen is produced by the aquarium plant and released which appears as bubbles during photosynthesis

Explanation:

1. He's misguided because he believes water contributed much to the weight.

In reality, carbon (not water) makes the bulk of the weight added

photosynthesis equation points that carbon is produced in the form of sugar

6CO2 + 6H2O + light Energy -> C6H12O6 + 6O2

2. During photosynthesis, in the chloroplast, the thylakoid produces oxygen which is seen as the bubbles

The bubbles are oxygen and are produced from the thylakoid membrane in the chloroplast through photosynthesis.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101