Q12: Capillaries do not have a tunica media layer. This implies which of the following about capillaries? Capillaries cannot close their valves. Capillaries cannot dilate or contract. Capillaries do not have an outer layer of connective tissue. Capillaries do not contain an inner layer of endothelial tissue.

Capillaries cannot dilate or contract.

Explanation:

The Tunica media layer is mainly responsible for the contractility of blood vessels. Therefore, due to the absence of a tunica media layer in capillaries, these blood vessels are unable to contract or relax.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.