Cho các ý sau: (1) Cấu tạo theo nguyên tắc đa phân

(2) Đơn phân là glucozo

(3) Không tan trong nước

(4) Giữa các đơn phân là liên kết glicozit

(5) Là nguồn năng lượng dự trữ của tế bào

(6) Đều có cấu trúc mạch thẳng

Trong các ý trên, có mấy ý là đặc điểm chung của xenlulozo, tinh bột và glicogen?

A. 3 B. 4 C. 5 D. 6

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.