Question

how are leaf and kidney bean plant different from wheat plant​

Answer 1

seed anatomy

seed germination

plant growth and development

plant reproduction

The flowering plants

Flowering plants can be divided into two groups on the basis of their seed structure.

Plants such as corn have one food storage unit in the seed called a cotyledon. These plants are therefore known as monocotyledonous plants or monocots.

Plants such as bean have two food storage units in the seed. These plants are therefore known as dicotyledonous plants or dicots

 

There are other differences between monocots and dicots. Monocots have parallel veins in the leaves. Dicots have a veination pattern resembling a net. Monocots generally grow from the base of the plant. Dicots generally grow from the tips of the branches and near the leaves. Refer to the table below.

PropertyMonocotsDicotsCotyledons in the seedOneTwoVeinationParallelNettedGrowth regionbase of stemshoot tips and leaf axils

The axil is the angle that the leaf makes with the stem. Growth from this position is the result of an axillary bud.



There are also microscopic differences between monocot and dicot plan

A bean seed is kidney-shaped with a protective layer on the outside called a test. Examination with a magnifier will show the other structures which include the hilum and the micropyle.



Inside the seed one can observe the two cotyledons which contain the embryonic plant between them. The following parts should be visible when the seed is split open.

cotyledons - there are two cotyledons in the bean seed

embryonic bean plant - the embryonic bean plant will develop into a new plant when the seed germinates

epicotyl - the embryonic first leaves of the bean plant, often called the seed leaves

hypocotyl - the embryonic first root of the bean plant



Materials

bean seeds (for examination--fresh string beans are good for examination purposes)

corn seeds (for comparison with bean seeds)

magnifiers

Science Journals

Procedure

1. Students take a bean seed and examine it with a magnifier. They draw the outside of the bean seed in their Science Journals and they label the parts.

2. Students carefully separate the been seed and open it like a book with the hilum serving as the hinge. Using a magnifier, they observe the internal parts of the bean seed. They draw and identify the parts of the bean seed in their Science Journals including

cotyledons

epicotyl - the embryonic leaves

hypocotyl - the embryonic root

In their Science Journals, students describe each part of the bean seed, what the name of the part is, where it is located and what its function is.

3. The place of the bean seed in the pod can be seen by opening a pod carefully. It is best to split the pod open along the thinner seam so as to leave the bean seeds still attached within.

Students open string bean pods for study although pea pods could be used as well. They observe the points at which the seeds are attached. Drawings and descriptions are written in their Science Journals.