根据最后一段最后一句“The spines make the animal and people keep away from the fruit, so that the seeds can be spread in another place.”(刺会使动物和人远离水果,这样种子才能在另一个地方传播。)可知仙人掌的刺是用来保护水果的,故选A。
However, in the places where they live, there 7 (be) often little water. To live, cacti have 8 (they) special abilities(特殊能力). These abilities make them store(存储) water. In fact, the spines of cacti are their leaves. They keep cacti from 9 (annual) that eat plants. They ...
What is the life cycle of spore-bearing plants? What kinds of spores are produced by flowering plants? What are some examples of seed-bearing plants? What is an ovule in plants? What are the characteristics of seed-bearing plants?
What is the life cycle of flowering plants? Are herbaceous plants monocots? What type of ferns are perennials? What is double fertilization in angiosperms? What is a plant with spines in plant biology? What is seed dispersal in plant biology?
Succulent plants are plants that contain special tissues that can store water. These tissues may be in the leaves, stems, or roots. A well-known example of a succulent plant is the cactus. These plants are also called fat plants. The term fat plants probably originates because succulents ...
1. There are over 2.000 different types of cact in the world. 2. Some cacti are tall and green. and have spines. But others are much smaller and in many different colours and shapes. 3. Cacti usually live in dry areas. 4. Spines can protect acti from animals that cat plants. They ...
Jellyfish have no brains and no spines C. Scientists believe jellyfish glow for several reasons D. Bell-shaped bodies E. They look like plants because they attach to the ground and grow upwards F. Jellyfish are not really fish G. Tentacles 相关知识点: 试题来源: 解析 36.F 第一段...
With greyish brown, flecked bark, trees can become quite gnarled and twisted, especially when exposed, and the twigs often develop spines. This ‘crabbed’ appearance may have influenced its common name, ‘crab apple’. Erythronium –These are bulbous perennials with paired, ovate or broadly ...
What is a succulent plant ? Succulent (Latin: succos = juice, sap) plants from more than 60 families and 300 genera have evolved special water-storage tissues in thickened or swollen leaves, stems or roots as an adaptation to the arid climates of deserts
What are examples of analogous organs in plants? What are examples of herbaceous plants? What are examples of non-vascular plants? What is a plant with spines in plant biology? What is the relationship between plant anatomy and cytology?