Giúp tui vs cần gấp :
cho đoạn phân tử ARN có trình tự :
-A-A-U-X-U-G-X-G-U-A-
a, viết đoạn mạch đơn của phân tử ADN tổng hợp phân tử ARN trên
b, xác định cấu trúc của đoạn phân tử ADN có đoạn mạch đã tổng hợp

Rank the three variables in terms of how strongly they affect the "species" composition of the bacterial communities. place the variable with the weakest effect on the left and the variable with the strongest effect on the right.

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.