Answer;
B. Both primary and secondary succession involve ecosystems recovering from a disruptive event.
Explanation;
-Primary succession occurs following an opening of a pristine habitat, for example, a lava flow, an area left from retreated glacier, or abandoned strip mine. In contrast, secondary succession is a response to a disturbance, for example, forest fire, tsunami, flood, or an abandoned field.
-Primary succession begins in barren areas, such as on bare rock exposed by a retreating glacier. Secondary succession follows a major disturbance, such as a fire or a flood.
The nervous system plays an important role in body functioning. the receptors (skin ) transmit the messages from the sensory neurons to the spinal cord.. fro the required action is carried out through messages to the effector which goes through the mototr neurons
Answer:
Characteristics of Chordata. Animals in the phylum Chordata share four key features that appear at some stage during their development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post- tail (Figure 2). In some groups, some of these are present only during embryonic development.
Answer: Male red-winkled black birds defending limited nesting sites from other males.
Explanation: Intraspecific competition is defined as a competition between two individuals from the same species. There are two types of intraspecific competition which are interference intraspecific competition and exploitation intraspecific competition. For the purpose of the answer provided above, interference intraspecific competition is discussed.
In interference intraspecific competition, the species establish hierarchies through aggressive behavior in which one or more individuals within the population holds a dominant status over the others. These individuals limit or prevent access of more subordinate individuals to a resources through direct interactions.
Here, only those individuals who are dominant or holds territories will increase their production success. Example of this is in when two winkled black birds establishes a territory of nesting sites, thus limits the access of this nesting sites thereby defending the nesting sites from other males.
Yeah, probably because say a short wide beak allows the bird to crack nuts and a long skinny beak allows a bird to eat bugs out of trees and fruits then a beak somewhere in the middle of the two might allow them to eat both.
