Answer:
There are many leaf function but the main one is it produces food for the plant by photosynthesis.
Other function of leaves
• store food during germination
• protect vegetative and floral buds
• the leaves carry out the process of respiration in plants.
• leaf helps in transpiration by realeasing excess water.
Answer: The testing effect
Explanation:
The testing effect can be generally used to find out that long-term memory is generally increased when a bit of the (adapting)learning period is spend towards retrieving what is to be retained in the brain.
This effect is often referred as practice testing or retrieval practice. This is required to test what is retained in the brain which was studied over a long time back.
This effect is known as the testing effect.
Answer:
C. Joining of self-replication molecules into protocells.
Explanation:
For the origin of life, at least three conditions are needed.
- there must have been a supply of replicators, that is, self-replicating molecules.
- copying of these replicators must have been subject to error through mutation.
- the system of replicators must have required a continuous supply of free energy and partial isolation from the general environment.
The radiation received from the sun on the early earth must have fulfilled the requirement of mutation. The mutation is necessary for bringing variation in the genetic material thus driving evolution. To protect the self-replicating molecules from the external environment and to keep them together, the molecules must have been enclosed in a membrane barrier, which should be selectively semipermeable, to facilitate the exchange of molecules.
Answer:
agua, luz, CO2
Explanation:
(in english water, light, CO2)
DNA replication is the process by which two DNA molecules are produced from one parent DNA molecule. DNA replication is semi conservative, this implies that, each strand in the double helix DNA molecule act as a template for the synthesis of a new, complimentary DNA strand. Because semi conservative method has a DNA template that is already accurately formed, the probability of having errors in the newly formed strand is drastically reduced.
