题目

Q7 What type of joint will give the greatest range (amount) of movement?
A Sliding
B Ball and socket
C Fixed
D Hinge
Q19 What is the function of root hairs?
A Anchor the root firmly in the soil
B Prevent heat loss from the root
C Absorb water from the soil
D Absorb carbon dioxide from the soil
Q22 In the kidney blood is filtered.What is the special term given to this process?
A Serial-filtration
B Ultra-filtration
C Reverse osmosis
D Active transport
Q23 If the fruit fly,Drosophila melanogaster,has a haploid number of four,how many chromosomes will be present in the non-gamete cells of the adult?
A 2
B 4
C 8
D 12
Q24 What is the role of phloem?
A Supporting the stem and branches of the plant
B Transport of dissolved minerals from the root
C Transport of sugars towards growing points
D Allowing water vapour to escape from leaves
Q25 A xerophyte is a plant that grows in very dry conditions

提问时间：2021-04-17

答案

D C C C C A C