What is responsible for identifying foreign invaders and remains in the system for a long period of time?

antigens

red blood cells

lymph nodes

axons

A student completed a lab report. Which correctly describes the difference between the "Question" and "Hypothesis" sections of her report?

The thickest sedimentary deposits are found? near land, around the equator or in the middle of the ocean

True or false absolute age examines the position of rocks in a sequence

What is true of intercellular signals that do not go through direct connection between cells such as plasmodesmata

Why don't ecosystems systems exist between fresh and salt water systems?

How does waste move from the kidney to the bladder in the human excretory systems

A plant uses energy from the Sun to make food. What kind of energy transformation is this? a. light energy to chemical energy b. chemical energy to light energy c. mechanical energy to chemical energy d. light energy to mechanical energy

The major body structures and organ systems form during which trimester

What is the main female sex hormone? is it d? testosterone adrenaline insulin estrogen

What kind of a Erosion involves dissolved particles