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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:
DNA BASE PAIRS:
adenine & thymine
cytosine & guanine
those are the pairs that go together
Answer:
The correct answer is - B. disruptive selection.
Explanation:
Adaptive radiation is a type of genetic drift that relatively fast evolution of many species from a single common ancestor which means there is a big drift in a very small time.
Disruptive selection is a type of natural selection that shows phenotypes (individuals with groups of traits) of both extremes but has very few individuals in the middle. An example of this type is the evolution of mammals after the extinction of dinnosaurs.
Answer:
To keep the animal alive for example: the functions of lipids include storing energy, signaling, and acting as structural components of cell membranes.
Carbohydrates: One of the primary functions of carbohydrates is to provide your body with energy.
Explanation: