In South Africa, it's usually quite warm around the time of the Northern Hemisphere winter solstice and quite cool around the time of the summer solstice. a. Trueb. False

Which compound was abundant in Precambrian Earth's oceans, before complex life evolved on Earth? dissolved oxygen dissolved carbon dioxide dissolved methane dissolved ammonia

Cell theory was discovered and advanced because of the development of which instrument?

Plants have male and female gametes (sperm and ovaries) and can reproduce sexually. a. True b. False

Name the biome that has cold winters, warm summers, moderate seasonal precipitation, fertile soils and occasional wildfires.

The duck-billed platypus has 52 chromosomes in its body cells. When the platypus's body cells divide by mitosis, how many chromosomes will each daughter cell have?

Which of the following is a human - Made factor that can change climate? A. The solar cycle B. Respiration C. Industry D. Earthquakes

Why does the phylogenetic tree tell you about the evolutionary relationships of animals? A. animals are unrelated to one another. B. Animals have many different ancestors. C. Animals belong to serval different kingdoms. D.

How to increase sodium levels in elderly without causing water retention?

Polar molecules are nonpolar molecules are ---and

The electrons that chlorophyll loses to electron transport chain are replenished by