The answers that fit the given blanks above are EXTENSOR and FLEXOR, respectively. Extensor muscles are those muscles that contract once extended and flexor muscles are those muscles that contract once flexed. When you extend, you move the limb away from the trunk; and when you flex, you are moving it toward the trunk.
Answer:
Give at least 3 reasons why viruses are considered non-living and therefore NOT classified into the Linnaean system of life.
Viruses as we know that they are micro-organism but they are not produced from cell
Viruses does not grow rather undergo replication by multiplying into several number within minutes
also they rely on host energy as they could not produce energy needed for their usage.
Explanation:
Every living organism are made up of cells which makes it the fundamental unit of life where virus does not fall into such category, Growth is an essential characteristics of every living organisms, viruses only replicate rather they does not undergo growth.
Answer:
Option-B
Explanation:
Phototropism refers to the movement of plants in response to light. The mechanism of phototropism involves the photoreceptors which respond to a different wavelength of light: the phytochromes to red light, cryptochromes to blue light and the phototropin to the UV light.
Plants integrate the signals obtained from these receptors and then activates the gene which will be involved in the phototropism.
The gene could be the production of the auxin hormone and the PIN proteins which helps in the distribution of the auxin in the plants. Due to the production of this hormone and its distribution in the shoot, the grass tips bend towards the light.
Thus, Option-A is correct.
A) Thylakoid
B) Lumen
C) Granum
D) Stroma
