1. Which is NOT a cell of the immune system?

A-T cells

B-B cells

C-White blood cells

D-Red blood cells

An advantage of gas exchange in fresh water, compared with gas exchange in air, is that: a. water usually contains a higher concentration of oxygen than air b. ventilation requires less energy in water c.

A woman has a rare eyelid abnormality called ptosis, which makes it impossible for her to open her eyes all the way. The condition is caused by a dominant allele. The woman's father had ptosis but her mother was normal.

What do humans release when they breath out

Which of the following is the first step toward proposing solutions effectively? Determine the desired outcome. Propose a possible solution. Act on a possible solution. Identify the unresolved problem or dilemma.

Which feature may form as slightly acidic surface water and groundwater dissolve carbonate rocks such as limestone? A. lakes B. caves C. mountains D. alluvial fans

What is the similarity between trenches and subduction zones?

Which of the following is NOT mentioned as an important role of soil? O Filtering water O Supporting organisms Filtering air O Providing nutrients to plants

What is the difference between a reactant and a product?

Choose the definition of: Vertebrates A. Having no backbone B. have a backbone C. having several backbones D. having lost a backbone

Describe the process digestion of mouth