Which statement(s) correctly describe(s) the role of hormones in calcium metabolism? be aware that all statements may be correct. which statement(s) correctly describe(s) the role of hormones in calcium metabolism? be aware that all statements may be correct. intestinal absorption of calcium depends on the level of active vitamin a that we have in our body. parathyroid hormone and calcitonin stimulate calcium reabsorption by the kidneys. calcitonin is released when blood calcium levels are high and increases the activity of osteoclast cells in bone, releasing calcium from bone into the blood. parathyroid hormone is released when dietary calcium levels are low.

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.

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

Which of the following will a bacterium produce when a human gene is added to its genome? question 4 options: human carbohydrates a protein made up of both human and bacterial properties the human protein coded for by the human gene human plasmids that can be isolated from the bacterium