Place the following statements that describe the 5 steps in an adaptive immune response in the order in which they occur. - Long lived-immune cells allow the second response to a given microbe to be stronger and faster than the first response - Adaptive immune cells are born in the bone marrow, then mature in either the bone marrow or the thymus - Adaptive immune cells use specific receptor proteins to bind to antigens very specifically - Intracellular signaling pathways are initiated, causing the adaptive immune cell to change cell division, gene expression, and protein translation - Adaptive immune cells kill invading microbes, either directly or indirectly

Complete the sentences by matching the names of trees to the appropriate blanks. to do this, drag the names on the left into the appropriate blanks in the sentences on the right. match the words in the left column to the appropriate blanks in the sentences on the right. terms may be used more than once. make certain you have filled every blank with a term before clicking submit. 1. deciduous trees lose their leaves seasonally and include trees such as maple and elm. 2. conifer leaves are generally thin and needle-like, while seeds are contained in cones. conifers include cedar and pine. 3. evergreens are plants that maintain their leaves in all seasons and include trees such as cedar, elm, and pine. 4. hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as maple, , and cedar. elm returned you filled in 2 of 10 blanks incorrectly. mango trees are tropical broad leaf plants that maintain their leaves all year long. no credit lost. try again.

Look at the photo of the leaf. which term best describes this leaf?

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels