Which is the following is an example of compartmentation at the intracellular level? a. regions of the brain are specialized for different functions. b. the walls of arteries consist of an outer connective tissue layer, a middle layer of smooth muscle and elastic fibers, and an inner endothelial lining. c. the heart is divided into four chambers, with two upper chambers that receive incoming blood and two lower, more muscular chambers that send blood out into the circulation. d. skeletal muscle cells have organelles called sarcoplasmic reticulum (sr) that contain large stores of calcium ions. e. the calcium is released during muscle contraction and then pumped back into the sr as the muscle relaxes.

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explanation:

the answer is admiramos

the rule for verbs is whoever you are referring to (in this case 'nosotros'), you need to change the ending of the word.

nosotros - amos

yo - o

tu - as

el, ella, usted - a

ellos, ellas, ustedes - an

(examples: nosotros bailamos (instead of bailar) or yo hablo (instead of habla)

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.