Answer:
Cross-pollination
Explanation:
cross-pollination is when pollen from one plant gets transported to another plant.
self-pollination is when pollen gets transported from the anther to the stigma of the same flower or a different flower on the same plant.
Answer:
In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size.
Explanation:
Answer:
The options
a. 3:4
b. 3:1
c. 4:3
d. 4:9
e. 1:3
The CORRECT ANSWER IS e.
e. 1:3
Explanation:
Compound A (green) , GENE A is transformed to Compound B (blue)
Compound B (blue) , GENE B is transformed to Compound C (red)
After gene A as transformed the compund A to compound B, gene B can can transform the compound B to C. Therefore, once gene A is forming blue colour from green, gene B as the capability to form red colour from the blue one.
Lets cross AaBb X AaBb (the product of the cross is shown in the attached image. )
we will have the following genotypes:
AABB-1
AABb- 2
AaBB-2
AaBb-4
We obtain a functional copy of A and B gene from the cross. Thus, the transformation of colour will proceed from green to red and they will form red colour, giving us 9 red colour.
AA bb -1
Aa bb -2
The functional B gene is absent in these organism while the funtional A gene can be seen, thus only blue colour will be formed or 3 individual will give the blue colour.
aa BB -1
aa Bb -2
aa bb-1
these set of individual will not give or form any colour as they do not possess the functional A gene which is a requirement for starting the cascade of transforming the compounds.
Therefore, the blue to red offspring will be
3:9 or 1:3
The CORRECT ANSWER is e.
* Channel proteins- these are proteins with a hydrophilic pore where specific ions are able to pass through the membrane. Each channel protein is specific to an ion. This is the only way ions can travel through the membrane. They are trans membrane proteins.
* Carrier proteins- these are proteins which allow larger or polar molecules through the membrane. They are trans membrane proteins.
Carrier proteins essentially “carry" signals that are not soluble in aqueous solution through the blood stream to their target cells. Carrier proteins for hydrophilic signals prevent degradation of the signal. Channel proteins are embedded in cell membranes. They often are receptors (though not always), and when activated, allow specific ions to pass through the membrane.
A channel protein is a special arrangement of amino acids which embeds in the cell membrane, providing a hydrophilic passageway for water and small, polar ions. Like all transport proteins, each channel protein has a size and shape which excludes all but the most specific molecules
The carrier protein facilitate diffusion of molecules across the cell membrane. The protein is imbedded in the cell membrane and covers the entire membrane. This is important because the carrier must transport the molecule in and out of the cell.
