When would exposure to a potentially harmful substance be most likely to damage many organs in a developing embryo?
(1)during the last three months of pregnancy
(2)during the early stages of pregnancy
(3)during the formation of the zygote
(4)during meiosis in both males and females

Ryan rears sheep for their wool. recently the quantity of wool that ryan gets has diminished. this is because the new sheep are not that wooly. ryan should add which nutrient to their feed so that the sheep becomes more wooly? a. cornb. ironc. cottonseedd. vitamin a

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

What percentage of light hits earth's surface directly?