What is the second line of defense against pathogens

What is the frequency of a wave that has 640 crests pass in 8 seconds

Natural selection acts on populations through a specific trait. Which statement must be true about that trait? Question 6 options: The trait is passed on genetically to the next generation. The trait has little impact on survival.

What abiotic aspects of an ecosystem can be affected by biotic aspects? A) diseased plants from fungi B) extreme heat evaporating a stream C) heavy rain adding to soil erosion D) animals digging in the ground adding to soil erosion

Which one of the following describes the process of aerobic cellular respiration?

A person is contact paneling down river at average speed of 10 km an hour after 3.52 hours how far has she traveled

Which statement describes the reaction for cellular respiration? The equation is carbon dioxide + water → glucose + oxygen + water and energy is required in the form of light O The equation is glucose + oxygen carbon dioxide + water and energy is

When is energy needed to move substances across the cell membrane

Which term describes the highest pressure against the walls of the blood vessels?

How might more than one agent of physical weathering operate in the same place

What is the primary source of energy for food chains in an ecosystem? decomposers producers consumers the sun