Answer:
Some individuals have genes that increase their chances for survival and reproduction. These individuals are more likely to reproduce and pass on their genes, causing their genes to become more common in the next generation.
Explanation:
The basic idea of natural selection is that environmental conditions determine how well the characteristics of organisms contribute to the survival and reproduction of the organism; organisms that do not have these traits may die before reproduction or be less fertile. As long as environmental conditions remain the same or close enough for these traits to remain adaptive, these traits will become more common in populations. The loss of an ecological niche of a species or overcrowding as a result of an increase in abundance can significantly alter the adaptive characteristics required for survival. In this case, and also in any environment where survival is determined more by ecology than secondary sex characteristics, ecological choice takes place.
Answer;
b. The cells appear well-defined, indicating the presence of cell walls.
Explanation;
Although, the overall function of the cell is the same, there are some important differences between animal and plant cells.
The first difference is that plant cells have an organelle called chloroplast. Chloroplasts contain a pigment called chlorophyll (which gives the plant its green color).
-Additionally, animal cells are smaller than plant cells and have a membrane around them that is flexible and allows molecules, gases and nutrients to pass into the cell. Plant cells are larger and in addition to a membrane they have a rigid cell wall. The cell wall does not let any material pass so instead the plants cells must have tiny openings between cells like doors between rooms in your house.
Answer:
one negative one positive feedback loop
They differ by the number of neutrons.
Mucus in our noses and respiratory tracts trap microbes and pathogens from entering our body. Wax also trap pathogens and other foreign particles from entering our ears. Non-specific defenses are surface coverage defenses. T-cells target specific pathogens, which is a type of specific defense acted upon by our immune system.