Which statement about sex cells is correct? Sperm are male gametes
Sperm are female gametes
Ova are male gametes

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?