Please answer!! What is the system protects the body against infections?
a
Circulatory system
Respiratory system
b
С
Immune system
d
Digestive system

Climate warming trends allow plant and insect species to inhabit larger ranges. select the best answer from the choices provided

What is a limitation of using a chemical formula, such as c6h1206, to represent a compound? the chemical formula does not show the types of elements that make up the compound. the chemical formula does not show how the atoms are connected to one another the chemical formula does not show the number of atoms of each element in a molecule. the chemical formula does not show the chemical symbols of the elements in the compound

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs