Â©2003 Why is there a decision to make about having mammograms to screen for breast cancer? A mammogram every two years to screen for breast cancer reduces the chance of dying from breast cancer among women aged 50 to 69 years. It is unclear if women aged 70 years and older get the same benefits. mammogram every two years to screen for breast cancer reduces the chance of dying from breast cancer among women aged 50 to 69 years. It is unclear if women aged 70 years and older get the same benefits.
Temperate grasslands are located north of the Tropic of Cancer (23.5 degrees North) and south of the Tropic of Capricorn (23.5 degrees South). The major temperate grasslands include the veldts of Africa, the pampas of South America, the steppes of Eurasia, and the plains of North America.
Not surprisingly, grass is basically the only thing that grows in Grasslands. Trees and large shrubs can't survive there. Temperate grasslands can be found in South Africa, Hungary, Argentina, Uruguay and central North America.Temperate grasslands have very cold winters and warm-to-hot summers.bout one quarter of the earth is covered by grasslands. This biome can be found on every continent except Antarctica. Grassland biomes are large areas of grasses, herbs and flowers. Trees have a hard time surviving in most grassland biomes cuz the soil is too fine and dry.