Answer:
Evolutionary biology illustrates both the pattern and processes. The processes of evolution are natural selection and other mechanisms, which modifies the genetic structure of the populations. These processes result in evolutionary patterns, that is, the products generated by evolution with time.
Phylogeny refers to the evolutionary history of a species or a group of species. In order to redevelop phylogeny, the scientists use systematics, that is, an analytical method to categorize the diversity and finding the evolutionary associations between the extinct and the living species.
The evidence used to redevelop phylogenies can be attained from the fossil record and from the biochemical, morphological, and genetic similarities between the species. The scientists are functioning to develop a universal tree of all life, which will get refined with the gathering of new information.
Answer:
The freshwater is hypotonic to the fish
Explanation:
<em>A marine fish is adapted to living in water that is salty.</em>
<em>The fish will not survive because the freshwater would be hypotonic to the body of the fish and as such, excess water would enter its body which will lead to its death. The cells that make up the body of the fish will take-in excess water and lyse, leading to the death of the fish itself.</em>
Answer:
A worker bee defends the hive while the queen bee lays eggs
A prairie dog barks to alert family members when it spots a predator
Explanation:
Just like people, some animals live in communities, where each of them plays a certain role. For those animals, we can say that they live in a social hierarchy.
Examples that describe something like this are the second and fourth ones.
In a hive, there are different types of bees: workers, drones, and a queen. Each of them plays their role, which makes their hive function properly.
Prairie dogs are another example of species that live in large communities. Since they are small and have numerous predators, they rely on each other for protection. They do this by barking whenever they spot a predator, this way alerting other members of their community.
The rest of the statements simply tell about how some species live without mentioning their social life. This is why they are incorrect.
C. They are members of the same species but different genera.
Answer:
cognitive
Explanation:
The symptoms of depression are characterized into three broad groups
1. Cognitive – The common symptoms observed include constant negative thoughts, pessimism, feeling guilty for all bad happenings around them, thinking of ending their life
2. Behavioral – These include behavioral changes occurring in a person facing depression such as poor hygiene, inefficiency in work, constant crying, anti-social thoughts and behaviour and low energy
3. Emotional – Under this head a person feel sad, lonely, worthless and hopeless.
