1. which of the following accurately describes hiv? a. hiv leads to aids, when about one third of the individual's t cell count is lost. b. hiv can pass easily from one person to the next through casual contact. c. hiv is deadly, but doesn't target key cells in the immune system. d. hiv is able to hide from the immune system.

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

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.

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere