Answer:
We can determine the past arrangement of leaves on a bare twig by looking at the arrangement of axillary buds and leaf scars.
Explanation:
- The arrangement of leaves on a branch or stem is called phyllotaxy.
- Leaves are formed at stem nodes.
- They bear axillary bud on their axil.
- Axillary bud give rise to flowers and new branches.
- When leaves shred off we can determine their phyllotaxy by looking at the axillary buds on the nodes.
- When leaves fall off the stem, they leave scars at the nodes, these scars can also be considered to find out the attachment of leaves and phyllotaxy.
Common leaf arrangements are:
- Alternate.- When one leaf arises at each node and successive leaves develop on alternate sides .se.g. As seen in Barberry
- Opposite- When two leaves arise at one node and on the opposite side of the stem. E.g as seen in maple.
- Whorled.- When three or more leaves arise at a node forming a whorl.
Photosynthesis begin when chlorophyll absorbs light energy. Chlorophyll is found in the chloroplast. chlorophyll which are arranged in and around the photosystems is vital for photosynthesis since it absorb energy from light. This light is used by plant to manufacture their own food
Answer:
Hey there!
The paramecium receives water through a process known as osmosis, where the water outside the paramecium passes through the paramecium's cell membrane.
Let me know if this helps :)
