Which characteristic is shared by all arthropods. a. jointed legs b.endoskelent c. gills or d.calcified hard shell

The correct answer is A. Jointed legs

Explanation:

Arthropods are a type of animal mainly characterized by an exoskeleton or external skeleton and jointed appendages or legs, which means all arthropods have legs or similar structures that are divided into different sections known as podomeres. In the same way, the body of arthropods is composed of different segments. This category includes animals such as spiders, scorpions, bees, crabs, among others. Additionally, some but not all arthropods have other features such as shell or wings. According to this, the characteristic that is shared by all arthropods is jointed legs (option A).

Explanation:

1. Increasing the concentrations of reactants in a chemical reaction would affect a reaction positively by increasing the number of collisions within a particular period which in turn increases the rate of reaction.

2. The molecules gains energy,which enable them to move faster and collide with the right energy for a reaction to take place.

3. The average kinetic motion of molecules in a solution can be measured by measuring the temperature. Temperature is a measure of the average kinetic energy of molecules in a solution.