Answer: 6. Although most invertebrates have a nervous system, the complexity of the system varies from one organism to another.
Some invertebrates such as the hydra and starfish have a simplified system of nerves, which is called a nerve net. It consists of just nerves, capable of sense and touch only. Meanwhile, other invertebrates such as the planarian have a more developed nervous system, complete with a brain and nerve cord.
7. Radial symmetry and bilateral symmetry are two different types of biological symmetries found in organisms. ... The key difference between radial and bilateral symmetry is that radial symmetry generates identical body halves around the central axis whereas bilateral symmetry generates only two sides as left and right.
Explanation:
The answer is A.
Bc it’s raining and the temperature goes to freezing or below then the rain can turn into snow and typically temperature decreases naturally at night (or evening in this case)
Answer: 1: allergic disorders
2. Immunodeficiency disorders
3. Autoimmune disorders
4. Cancers
In the fields commonly considered sciences, a primary source is the first report of research, published as a journal article, a research report or conference proceeding, or if extensive, a book or book chapter. They include methodology, data and results, and discussion.
Fox, squirrel, and grasshopper.
If wrong I’m sorry