関連する実験動画

Updated: Jan 5, 2026

Cortisol Measurement in Koala Phascolarctos cinereus Fur
09:11

Cortisol Measurement in Koala Phascolarctos cinereus Fur

Published on: August 23, 2019

11.0K

コアラ を 救う ため の パイRNA

Astrid D Haase1, Todd S Macfarlan2

  • 1National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.

Cell
|October 19, 2019
PubMed
まとめ

コアラの生殖細胞は,PIWIと相互作用するRNA (piRNA) 反応を先天的に持っていて,ウイルスのRNAゲノムを標的と断片化する. この防御メカニズムは 適応免疫が発達するまで 生存を助長するかもしれません

さらに関連する動画

Author Spotlight: Developing Efficient Cryopreservation and Biobanking Technologies for Global Reef Restoration05:25

Author Spotlight: Developing Efficient Cryopreservation and Biobanking Technologies for Global Reef Restoration

Published on: June 7, 2024

1.3K
Field Collection and Laboratory Maintenance of Canopy-Forming Giant Kelp to Facilitate Restoration14:44

Field Collection and Laboratory Maintenance of Canopy-Forming Giant Kelp to Facilitate Restoration

Published on: June 7, 2024

2.2K

関連する概念動画

Conservation of Declining Populations02:07

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
12.5K
Keystone Species01:39

Keystone Species

Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...
24.1K
Conservation of Small Populations02:04

Conservation of Small Populations

Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
16.6K
Parental Care00:55

Parental Care

Many animals exhibit parental care behavior, including feeding, grooming, and protecting young offspring. Parental care is universal in mammals and birds, which often have young that are born relatively helpless. Several species of insects and fish, as well as some amphibians, also care for their young.
12.5K
Epiphytes, Parasites, and Carnivores02:40

Epiphytes, Parasites, and Carnivores

Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
16.5K
Altruism01:03

Altruism

Altruistic behaviors are “unselfish” behaviors—those that help another individual at the expense of the individual carrying out the behavior. Despite the negative consequences for the altruistic animal, these behaviors are thought to have evolved for several reasons.
42.2K