Answer:
<em>The correct option is C) T or t</em>
Explanation:
A heterogenous plant can be described as a heterozygous plant in which the alleles of a gene are different. For example, in the above question, the pea plant has one allele which is T and the other one which is t.
According to Mendel's law of segregation, the alleles assort independently at the time of gamete formation. Hence, there are equal chances that a gamete will carry T or t gene. Hence, the pollen grain will carry any one of the two alleles for the height gene.
The answer is the Plasma Membrane. The Plasma Membrane is a double-layered structure that surrounds the cell, and provides a shield between the cell and its environment.
<span>"A butterfly population includes both green and yellow butterflies, and a predator sees yellow more easily than it does green" would lead to evolution since the green ones would live on. </span>
Receptors that provide animals with information from the external environment are located in the:
- ears
- skin
- tongue
- eyes
- nose
These receptors are known as sensory receptors as they perceive the changes that occur in the external environment and transmit the information to the nervous system.
The name of these receptors located in the respective organ is as follows :
1. Ear - auditory receptor
2. Skin - mechano (cutaneous) receptors
3. tongue - taste receptors
4. eyes - Photoreceptors
5. nose - olfactory receptors
An example of how it detects the changes in the external environment can be understood as follows :
The substances that have odor produce chemicals known as odorants which bind to the olfactory receptors located in the nose which then produces electric signals which are transmitted via the nerves to the olfactory bulb in the brain and the smell is detected.