Which best describes the sex chromosomes in humans? a. females have two y chromosomes. b. females have two x chromosomes. c. males have two y chromosomes. d. males have two x chromosomes.

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

Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled