2. Which is the correct description regarding fertilization in plants?
(A) Fertilization involves multicellular organisms.
(B) Fertilization is initiated once pollens are on the stigma.
(C) Fertilization requires one fusion of cells.
(D) Fertilization does not require specific recognition of mother cells.
(E) Fertilization results in a change in ploidy.

78 According to the passage, who is NOT likely involved in the volunteer team? (A) University students. (B) Teachers at Liuqiu Junior High School. (C) Staff from a non-profit organization. (D) Tour managers from other countries.

79 According to the passage, when do sea turtles likely lay eggs? (A) At noon. (B) In the early afternoon. (C) At midnight. (D) At 10 in the morning.

80 According to the passage, how to keep the island green effectively? (A) Promote ecotourism. (B) Produce more debris to create the art wall. (C) Introduce more friends to visit this island. (D) Make food to feed sea turtles.

1. What is the correct sequence for the following structures in transmitting an electrical current of a typical motor neuron?1. cell body; 2. axon; 3. axon hillock; 4.dendrites; 5.synaptic terminals (A)4, 1, 3, 2, 5 (B) 5,4,1,3, 2 (C)4,3,1,2,5 (D)5,4,1,2,3 (E) 4,1, 2, 3, 5

3. A cell secretes a signal molecule that affects neighboring cells. What is the type of signaling?(A) Hormonal signaling. (B)Paracrine signaling. (C) Synaptic signaling. (D) Autocrine signaling. (E) Endocrine signaling.

4. What is the mechanism by which testosterone functions inside a cell? (A) It acts as a signal receptor that activates tyrosine kinases. (B) It binds with a receptor protein that enters the nucleus and activates the expression of specific genes. (C) It cooperates with a membrane receptor to response to drug treatment. (D) It acts as a steroid signal receptor that activates ion channel proteins in the plasma membrane. (E) It coordinates a phosphorylation cascade that reduces spermatogenesis.

5. Please identify which of the following structures is not haploid? (A)sporangium (B) archegonia (C) pollens (D) fungal hyphae (E) ovule

6. What is the correct order of plant evolution? (A) secondary cell wall → independent gametophytes → formation of protected embryo →double fertilization (B) secondary cell wall →multicellular gametophytes → double fertilization → formation of the protected embryo (C) independent gametophytes → secondary cell wall → formation of protected embryo →double fertilization (D)multicellulargameto phytes → secondary cell wall → double fertilization → formation of a protected embryo (E) multicellular gametophytes → formation of protected embryo→ secondary cell wall →double fertilization

7. Spermatogenesis and oogenesis are different in that (A) Spermatogenesis produces four sperm and oogenesis produces one egg. (B) Spermatogenesis produces four sperm and oogenesis produces two eggs. (C)Spermatogenesis produces four cells and oogenesis produces one haploid cell. (D) Oogenesis begins at the onset of puberty.(E) Spermatogenesis begins in the embryonic stage of development.

8. There is a mutated flower that only contains sepals and petals. According to ABC model for floral development, which type of identity genes is mutated? (A)onlyB(B) only C (C)Aand B(D)Band C (E) A and C