In fact, all plants are products of evolution and different groups with distinctive characteristics evolved at different periods of time. Before these seed-bearing plants were completely established, the dominant vegetation consisted of the bryophytes and the ferns and allies which are both seedless and...
What are seed-bearing plants that produce flowers called? Plants that produce their gametes in flowers are called What will a fertilized egg develop into in seedless plants? What are the two types of seed-bearing plants? Do all seed-bearing plants produce seeds and pollens?
What are seedless nonvascular plants? Vascular and Nonvascular Plants Some plants, like trees, have two kinds of tissue, called xylem and phloem, that move water and nutrients throughout the plant. These are called vascular plants. Nonvascular plants don't have these specialized tissues to move ...
Horsetails (Pterophyta) are seedless vascular plants thought to be ancestors of modern trees, They grow as hollow, ridged stems. Their leaves are sheaths that encircle the shoots. They grow in moist rich soils, often found in soggy fields and at the edge of swamps. Some are evergreen, oth...
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且后文“Seedless plants usually have to be grown from cuttings, which involves more labor than planting seeds.可知,无籽植物需要投人更多的 劳动力,所以对农民而言是不利的,故 deficiency在此处的意思和 disadvantage 一致。故选B项。 反馈 收藏
The nonvascular seedless plants are the bryophytes (divisions Bryophyta, Hepatophyta, and Anthocerophyta) while the vascular seedless plants consist of the ferns and allies (divisions Psilotophyta, Lycopodophyta, Equisetophyta, and Pteridophyta). ...
Vascular plants have conducting, also referred to as vascular or liquefied, tissues that transport water, minerals, and photosynthetic materials throughout the plant’s roots, stems, and leaves. They differ from nonvascular plants, which do not have conducting tissues, and require water for ...
5. Plantsrespondtotheirenvironments. 6. Becauseplantsmaketheirownfood,theydonotcarryoncellularrespiration. Doyouagreeordisagree? Lesson1ReadingGuide-KC Howdoaplant’sstructuresensureitssurvival? Howarethedifferentplanttypesalikeanddifferent? PlantDiversity ...
fruit, the edible fleshy part is still the ovary of the plant. The absence of seeds generally is a result of breeding, and "seedless" fruits are able to mature without their flowers needing to be fertilized, which is what produces seeds in most plants, through a process called "...