They will be heavier because when the
plants in the dark are growing fast to reach the light they are not
growing outwards and are not growing large roots.
plants grown in the light will grow more steadily and continuously so
that at the end of the experiment they will be taller and heavier than
the plants grown in the dark.
1932 Emerson and Arnold conclude that the products of photosynthesis are not determined by the amount of chlorophyll molecules capturing light, but by the number of enzyme molecules carrying out light independent reactions.
The knowledge gained from breaking down the photosynthetic process has been used to create solar panels, harnessing the suns energy and converting it into electricity.
1804-1988 Exchanges of gases in plants is discovered scientists build upon each others discoveries, eventually complete uncovering the process of photosynthesis The Chloroplast Diagram As you already know, the chloroplast is an organelle found only in plant cells.
This is shown by 3 statistics; Plants
in the light grew an average of 5.7cm taller than those grown in the
dark, only two thirds of the plants grown in the dark stayed alive for
the whole experiment whereas all of the plants grown in the light
stayed alive, and the dry weight of the plants grown in the light was
an average of 0.28 grams heavier than those grown in the dark.
Although some of
the plants grown in the dark were taller and weighed more than some
grown in the light, on average the plants grown with ample sunlight
By the 2nd week of the experiment
4 of the plants grown with light were over 20cm tall, a height which
none of the plants grown in the dark ever achieved.
It could be expected that plants kept in the dark
would shrink after some time as they would become increasingly weak
and begin to die, but for some of the plants grown in the light to
shrink, and by large amounts, is unexpected.
In the first
week of the experiment the plants in the dark grew more than those in
the light as they were growing to try and find the light they need for
Also, the plants
grown in the light will have a greener pigment than those grown in the
dark although this is not something being measured in this experiment.
In terms of
weight, pot 11, which was the shortest of the surviving plants in the
dark was the heaviest of those grown in the dark, but this may well be
due to extensive root growth rather than growth of stems and leaves.
Hedera helix has two different stages in its life cycle: juvenile and adult. In the juvenile stage, the ivy does most of its climbing. sprout out from leaf nodes and attach to vertical surfaces to begin the climbing process. Leaves in this stage of life are dark green, waxy, and leathery. They are also sharply lobed.
Nathaniel Hawthorne in The House of the Seven Gables describes Phoebe as 'an illuminating speck of light transforming the darkness of the house like the light of dawn'; (92)....
include using more plants in both the light and the dark, recording
growth everyday to compare the point at which plants in the light grow
faster and also I would lengthen the experiment to compare the
flowering and pea production of plants under different light
Dark reactions make use of these organic energy molecules (ATP and NADPH). This reaction cycle is also called Calvin Benison Cycle, and it occurs in the stroma. ATP provides the energy while NADPH provides the electrons required to fix the CO2 (carbon dioxide) into carbohydrates.