相关实验视频

Updated: May 28, 2025

In Situ Hybridization Techniques for Paraffin-Embedded Adult Coral Samples
07:24

In Situ Hybridization Techniques for Paraffin-Embedded Adult Coral Samples

Published on: August 31, 2018

7.0K

性系统的进化和在里奇亚的回归进化

Jonathan Levins1,2, Łukasz Paukszto3, Katarzyna Krawczyk3

  • 1School of Biological Sciences, Monash University, Melbourne, VIC, 3800, Australia.

The New phytologist
|February 10, 2025
PubMed
概括

这项研究揭示了里奇亚属,一种肝草,从单独的性别 (dioicy) 演变为组合的性别 (monoicy) 多次,并减少了生殖结构. 这种适应有助于在极端环境中生存.

关键词:
里奇亚里奇亚 (Riccia Riccia) 是一个古老的酒店.这是一个神圣的Couscous.肝脏是一种肝脏.这是一个单一的.回归进化的回归进化.性染色体的性别染色体性别的确定性 性别的确定性

更多相关视频

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton08:02

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton

Published on: May 7, 2016

9.7K
Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria07:25

Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria

Published on: July 20, 2017

11.5K

相关概念视频

Speciation Rates01:07

Speciation Rates

Overview
20.9K
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.
42.3K
Types of Selection01:46

Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
40.0K
Gene Evolution - Fast or Slow?02:05

Gene Evolution - Fast or Slow?

The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
7.0K
Natural Selection and Mating Preferences01:06

Natural Selection and Mating Preferences

The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
Females, due to their biological roles in conception, pregnancy, and nursing,...
89
What is Evolutionary History?02:35

What is Evolutionary History?

Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
36.1K