Answer:
Environmental factors can influence natural selection because they can increase or decrease the amount of genetic variation in a population.
Explanation:
Natural selection is a process that involves the survival of species through changes in the expression of their genes, making possible the process of adaptation to environmental changes. It is one of the explanations for the biological evolution of species.
The second premise, necessary for natural selection to be possible, implies the existence of a variability (genetics) of traits among individuals in a population.
The other premises of natural selection are the faculty of traits to be inheritable and that genetic variability should lead to reproductive success and survival.
- <em>The other options are not related to the process of natural selection, since it is not possible for natural selection to increase or decrease the number of chromosomes, in addition to the fact that genetic variability must be observed in a population, not in a single individual, to be considered natural selection </em>
Answer:
The main step to prepare herbarium sheet are:
Collection and pressing of specimens. Fresh materials are pressed in plant press in herbarium press. ...
Drying of specimens. ...
Mounting of specimens on herbarium sheets. ...
Labeling of specimens. ...
Answer:
Explanation:
Plant transport systems move energy from leaves and raw materials from roots to all their parts. The xylem (tissue) moves water and minerals obtained from the soil to all other parts of the plants.
Answer:
27 volts
Explanation:
According to Ohm's Law
V=IR
where V is voltage I is current and R is resistance
V=3*9
V=27 volts
The correct answer is Axial Position
Reason:
When axial groups lie on the opposite sides of the ring, they are capable of holding large molecule and are stable as there is less steric hindrance between those groups. Also the molecular distance between them is large.
