相关实验视频

Updated: Feb 12, 2026

Gamete Collection and In Vitro Fertilization of Astyanax mexicanus
10:52

Gamete Collection and In Vitro Fertilization of Astyanax mexicanus

Published on: May 25, 2019

10.5K

最近,剑尾的后代大小和受精后的营养供应在剑尾的最新演变

Cheyenne Y Payne1,2,3,4, Derek Ly5, Rebecca A Rodriguez-Soto1

  • 1Department of Biology, Stanford University, Stanford, CA, USA.

Proceedings. Biological sciences
|February 10, 2026
PubMed
概括

剑尾鱼 (Xiphophorus) 具有不同的繁殖策略. 马林奇 (Xiphophorus malinche) 进化出更大,更有弹性的后代,这表明它适应了恶劣的环境和独特的母体营养供应.

关键词:
混合化 混合化 混合化玛特罗托菲 (Matrotrophy) 是一种对母体的崇敬.后代的大小 后代的大小剑尾鱼是一种剑尾鱼.翻译学 翻译学 翻译学 翻译学

更多相关视频

Author Spotlight: Exploring the Long-Term Health Impacts of Intracytoplasmic Sperm Injection on Offspring06:11

Author Spotlight: Exploring the Long-Term Health Impacts of Intracytoplasmic Sperm Injection on Offspring

Published on: May 17, 2024

1.2K
Determining the Egg Fertilization Rate of Bemisia tabaci Using a Cytogenetic Technique05:24

Determining the Egg Fertilization Rate of Bemisia tabaci Using a Cytogenetic Technique

Published on: April 1, 2019

5.8K

相关概念视频

Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
9.2K
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

3.5K
Convergent Evolution01:54

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
33.1K
The Evidence for Evolution02:55

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
48.4K
Fertilization01:38

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
91.8K
Cell Size01:22

Cell Size

Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
132.0K