Genes" is the one among the following choices given in the question that we call these units of hereditary information today. The correct option among all the options that are given in the question is the first option. I hope that this is the answer that you were looking for and the answer has actually come to your desired help.
Among the listed plants above, the one that we can expect to grow lowest to the ground would be the hornworts. Hornworts are non-vascular plants which can be found both on water and land. Since these plants do not have a vascular system, it is hard for them to move water internally due to the force of gravity which explains why they cannot grow more above the ground.
Answer:
identify the variables
Explanation:
control:type of lemon used
dependent:whether apple slice turns brown at pH>2
independent:pH value