Chromatin or chromosomes are duplicated during: g2 phase s phase prophase g1 phase

Ineed the answer asap. in order to be considered alive, an organism must simultaneously possess the characteristics of homeostasis, heredity, cells, reproduction, and

Number and variety of living organisms includes genetic, species, and ecological types

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?