The atoms and molecules produced by the reaction are called products. This causes the atoms to be rearranged into new substances.
The answer:
An atom's ability to undergo chemical reactions is determined by its outermost electrons.
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:
e: pleiotropy
Explanation:
<em>Pleiotropy is a genetic term that describes a situation in which a single gene controls the expression of multiple traits. </em>
Depending on the underlining mechanism, there are different types of pleiotropy:
- gene pleiotropy: this occur when a protein representing a gene interacts with other proteins or catalyses multiple reactions
- developmental pleiotropy: this occur when mutation of a gene have multiple phenotypic effects
- selectional pleiotropy: This occur when the phenotypic expression of a single gene has multiple effects on fitness.
In this case, cystic fibrosis gene has multiple phenotypic effects which include its effects on the lungs, pancreas, digestive system and other organs.
<em>The correct option is e.</em>