Answer:
e. cutin
Explanation:
Plant exhibit many variations to withstand the temperature variations, desiccation and increased UV exposure which are some of the factors associated with land habitat. Cutin is a waxy substance that is found in the outer walls of the epidermal cells of plants. Cuticle in plants serves to make the outer most covering of aerial parts of the leaves and non-woody stem of herbaceous plants. The cuticle is made of cutin.
Cutin serves to protect the plant’s aerial surfaces from excess water loss. It also filters the excess UV light and thereby protects the underlying plant parts. The thickness of the cuticle varies in different plants depending upon the environmental conditions. The leaves of plants adapted to hot, dry climates have thick cuticles. The thickness of the cutin layer also varies in different parts of a plant. For example, the upper epidermis of leaf generally has a thicker cuticle than the shaded and relatively cooler lower epidermis.
Answer:
Option B, Apply auxin directly to the lower part of the stem opposite from the direction you want the stem to bend.
Explanation:
Options for the question are
A) Apply auxin directly to the shoot tip on the side to which you want the tip to bend.
B) Apply auxin directly to the lower part of the stem opposite from the direction you want the stem to bend.
C) Inject compounds that block auxin receptors into the part of the stem opposite from the direction you want the stem to bend.
D) Plant the roots in two different pots, and apply auxin to the root bucket that is on the same side as the direction you want the plant to bend.
Solution
Auxin is responsible for stem elongation by inhibiting growth of lateral buds. The movement of auxin is opposite to the direction of elongation of cells. Generally, Auxin moves to the dark side which is opposite to the direction i.e the lighter side in which cell elongate . Due to this growth pattern, the stem tip gets curved towards the light.
Hence, option B is correct
<span>Prokaryotic cells and eukaryotic cells reproduce by mitotic cell division. Regardless of the type of cell, all cells must make a copy of their dna before they divide.</span>
He discovered the fundamental laws of inheritance through his work on pea plants believe it or not!
The causative agent of gonorrhea and one of the causative agents of meningitis is part of Diplococci subgroup of proteobacteria.
Diplococci
In essence, diplococci bacteria are paired, spherical, or rounded bacteria. Some bacteria may appear ovoid (elongated) or bean-shaped, unlike staphylococci bacteria, which form grape-like clusters and are genuinely round.
Numerous infections in humans can be brought on by both Gram-positive and Gram-negative bacteria. The shape of diplococci bacteria can be spherical or elongated, as was previously mentioned. Therefore, some species—such as those of the staphylococci bacteria—might not be perfectly round. Because of this, they are frequently referred to as having an ovococcoid shape. Several studies have suggested that this form is the result of two different peptidoglycan machineries. The cell division machinery is in charge of producing septal peptidoglycan, which leads to the formation of the cell wall, in coccoids (really round bacteria), such as Staphylococcus aureus and Micrococcus.
The causative agent of gonorrhea and one of the causative agents of meningitis is part of which subgroup of proteobacteria?
Learn more about diplococci here:
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