Which of the following is true about the alpine biome? a. the alpine biome has four distinct seasons. b. it is characterized by the presence of coniferous trees. c. it is the largest biome in the world. d. it is located in mountain regions.

The correct answer is option D, It is located in mountain regions.

Alpine Biome is located in the mountainous regions across the world. Some common places of occurrence are the Andes, Alps, and Rocky Mountain and are usually located at an altitude between 10, 000 feets to snow line of mountain. The climate in alpine biome is very cold, icy, windy and snowy. They possess rich biodiversity due to their extreme weather conditions.

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miss jennifer is buying pencils in packs of 12, notebooks in packs of 16, and red pens in boxes of 20. she needs to have the same number of pencils, notebooks, and red pens. how many packs of each type should she buy?

answer mine : )

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.