相关实验视频
Updated: May 31, 2026
07:14
Evaluating Dryocosmus Kuriphilus-induced Damage on Castanea Sativa
Published on: August 30, 2018
7.2K
[关于斯泰拉克斯品种变化的研究]
Yi-Ming Ding1, Meng-Hua Wu2, Brand Eric3
1School of Chinese Materia Medica, Beijing University of Chinese Medicine Beijing 100029, China Institute of Ben Cao Gang Mu, Beijing University of Chinese Medicine Beijing 100029, China National Institutes for Food and Drug Control Beijing 102629, China.
概括
草是一种传统的中医药,其起源不明,并且经历了两次主要的植物性变化. 它的质量评估标准在整个历史中一直保持一致.
科学领域:
- 民族植物学 民族植物学
- 药理学是指药理学,即药理学是指药理学.
- 传统中国医学的历史 传统中国医学的历史
相关概念视频
01:39Epistasis
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
01:38Limits to Natural Selection
Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
02:16Light Acquisition
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
02:39Gene Flow
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
01:43Incomplete Dominance
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.