Plants have two main types of asexual reproduction:vegetative reproduction and apomixis. Vegetative reproduction results in new plant individuals without the production of seeds or spores. Many different types of roots exhibit vegetative reproduction. The corm is used by gladiolus and garlic. How importa...
Whether orange, pink or yellow, lilies (Lilium spp.) capture the eye with their vibrant colors and trumpet shapes. Their ability to reproduce through sexual and asexual means affords the gardener several ways to propagate them. Sexual reproduction is used to hybridize plants into new cultivars, w...
Viruses can infect every type of host cell, including those of plants, animals, fungi, protists, bacteria, and archaea. Most viruses will only be able to infect the cells of one or a few species of organisms. This is called the ...
also known as the caterpillar. This herbivorousinsecthas a long, segmented body with multiple pairs of legs, short antennae, 10 to 14 relatively basic eyes (which only see light and dark), and powerful mandibles to chew through plants. The sole purpose of the caterpillar is to eat and grow...
In plants, vegetative multiplication is by mitosis (asexual reproduction) Why mitosis happens? It is important for the formation of new cells and maintaining the ploidy of the cells as the resulting daughter cells have the same amount of genetic information in them. The purpose of mitosis iscell...
True fungi (Fungi) and fungus-like organisms (e.g. Mycetozoa, Oomycota) constitute the second largest group of organisms based on global richness estimates, with around 3 million predicted species. Compared to plants and animals, fungi have simple body p
摘要原文 ABSTRACT: From those of the mealybug family, the citrus mealybug, Planococcus citriRisso, 1813 (Hemiptera: Pseudococcidae) is frequently held responsible for various diseases occurring in vineyards. This is a first time report in Brazil, on the occurrence of a parasitoid controlling P....
Natural polyploidy has been known for a very long time in plants, but long considered virtually impossible in nature in animals because of the so-called “Müller's rule” (Müller, 1925), until a few researchers started surveying natural populations for ploidy. Numerous cases of allopolyploid ...
Recently, they have been cultivated commercially on a small scale by inoculating the roots of seedling host plants with their spores. 盘菌纲羊肚菌属 A stained thin section through the hymenial layer of a morel (Morchella), showing asci with ascospores. 子囊与子囊果 (a)An electron micrograph...
第二章 菌类 .细菌门 .粘菌门 .真菌门 • 1.细菌门(Bacteriophyta):单细胞,原核,细胞壁为肽 聚糖(peptidoglycan),以直接分裂的方式繁殖,无有性 生殖。 • 2.粘菌门(Myxomycota):裸露而多核的原生质团,其营养 体的构造、运动和摄取方式与原生动物中的变形虫相似。但 繁殖时产生具纤维素细胞壁的孢子。