Top videos | PlayTube - The Ultimate Video Sharing Platform

Home
Articles

Top videos

All Time

Today

This week

This month

This year

4 animales más lentos del mundo Alfredo Leon 36 Views • 5 years ago

Algunos animales simplemente no tienen prisa. Desde perezosos hasta caracoles, desde tortugas hasta babosas, estos son algunos de los animales más lentos del mundo. Mientras que los animales como el guepardo y el galgo muestran su velocidad elegante, estas criaturas se contentan con deambular y arrastrarse, moviéndose a veces solo unos pocos pies por minuto.

Conozca a algunos de los bichos más insensibles de la naturaleza.

Perezoso de tres dedos

Los perezosos pasan sus días en las copas de los árboles, apenas moviéndose. Culpe su letargo a su increíblemente bajo metabolismo. Ese metabolismo lento significa que solo necesitan unas pocas hojas y ramitas para la nutrición. Viajan a un ritmo vertiginoso de 6 a 8 pies por minuto, moviéndose tan lentamente que las algas crecen en sus abrigos.

Caracol de jardín

Cuando solo tienes un pie, es difícil moverte muy rápido. El caracol de jardín común tiene un órgano plano y musculoso que lo impulsa extremadamente lentamente a lo largo de su camino útil. Para ayudarlo a moverse, el caracol libera una corriente de moco para reducir la fricción, informa el zoológico de Dudley. Es por eso que siempre ves un rastro de limo en la estela de un caracol de jardín. La velocidad máxima de un caracol de jardín es de 1/2 pulgada (1.3 centímetros) por segundo, pero puede moverse tan lentamente como aproximadamente 1/10 de pulgada (.28 centímetros).

Estrella de mar

Las estrellas de mar, son duras en la parte superior con muchos pequeños pies de tubo ondulados en la parte inferior. Esos pequeños pies ayudan a las estrellas de mar a agarrar superficies y moverse. Pero no se mueven muy rápido.

Una estrella de mar girasol adulta puede moverse a un ritmo vertiginoso de un metro por minuto utilizando los 15 mil de sus útiles pies de tubo.

Tortuga gigante

Hay muchas subespecies de tortugas gigantes que viven en varias islas, pero la más famosa es la tortuga gigante de Galápagos. La especie de tortuga viva más grande, puede vivir durante 150 años o más.

Charles Darwin estudió las tortugas cuando estaba en Galápagos en 1835. Pensó que se movían relativamente rápido. "Uno grande, descubrí al caminar, caminó a una velocidad de 60 yardas en 10 minutos, "A este ritmo, el animal recorre cuatro millas en el día y tiene poco tiempo para descansar". Sin embargo, Stephen Blake, coordinador del Programa de Ecología del Movimiento de las Tortugas de Galápagos, le dice a la BBC que sus tortugas se mueven un máximo de dos kilómetros por hora, sugiriendo que "Darwin probablemente las estaba persiguiendo".

fuentes:
https://www.treehugger.com/

Heredity and Evolution | CBSE Class 10 Science Chapter 9 (Biology) | Toppr Study Rao1923 38 Views • 3 years ago

In today's video, Learn Heredity and Evolution from CBSE Class 10 Science chapter 9 (Biology). Let's watch this amazing topic for your effective Board Exam - Biology Preparation with proper explanation by your favorite teacher. In this session, you will find Tips, Tricks, and Strategies in detail to score full marks in class 10 biology - Heredity and Evolution. So, Don't Miss It!!

📚 To Ace your CBSE Preparations do not miss watching Class 10 One-Shot (Full Syllabus) : https://www.youtube.com/playli....st?list=PLKb9HOyS0VG

👉 Do watch the complete session to know about Heredity and Evolution, Don't forget to share this video with your friends and classmates.

🚀 𝐉𝐨𝐢𝐧 𝐓𝐄𝐋𝐄𝐆𝐑𝐀𝐌 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐮𝐩𝐝𝐚𝐭𝐞𝐬 𝐚𝐧𝐝 𝐧𝐨𝐭𝐞𝐬 - https://t.me/+l_oNpJ5oWCg0Zjk1 Don't Miss It!!

✴️✔️ Do 𝐒𝐔𝐁𝐒𝐂𝐑𝐈𝐁𝐄 to the channel for more updates and hit that like button! ❤️ for daily live classes: https://www.youtube.com/c/Topp....rStudy?sub_confirmat
(Turn on your notification 🔔 to get all updates before anyone!!)

#HeredityandEvolution #TopprStudy #CBSEClass10Science #Class10Biology #TopprClass10 #Class10Preparation

☑️ Check out the CBSE Class 10 "Term 2" - Preparation Playlist (PCM)::
📚 CBSE Class 10 - One Shot (Full Chapter) - https://www.youtube.com/playli....st?list=PLKb9HOyS0VG
📚 CBSE Class 10 Maths (One Shot) - https://www.youtube.com/playli....st?list=PLKb9HOyS0VG
📚 CBSE Class 10 Physics (One Shot) - https://www.youtube.com/playli....st?list=PLKb9HOyS0VG
📚 CBSE Class 10 Chemistry (One Shot) - https://www.youtube.com/playli....st?list=PLKb9HOyS0VG
📚 CBSE Class 10 Biology (One Shot) - https://www.youtube.com/playli....st?list=PLKb9HOyS0VG
📚 CBSE Class 10 SST (One Shot) - https://www.youtube.com/playli....st?list=PLKb9HOyS0VG
📚 CBSE 9 & 10 - Term 2 Preparation - https://www.youtube.com/playli....st?list=PLKb9HOyS0VG

HEREDITY
The most obvious outcome of the reproductive process still remains the generation of individuals of similar design. The rules of heredity determine the process by which traits and characteristics are reliably inherited. Let us take a closer look at these rules.

Inherited Traits
What exactly do we mean by similarities and differences? We know that a child bears all the basic features of a human being. However, it does not look exactly like its parents, and human populations show a great deal of variation.

EVOLUTION
We have noted that there is an inbuilt tendency to variation during reproduction, both because of errors in DNA copying, and as a result of ****ual reproduction. Let us now look at some consequences of this tendency.
Evolution is the sequence of gradual changes that take place in primitive organisms, over millions of years, in which new species are produced.

Gregor Mendel - The Father of Genetics
Acquiring characteristics or traits from one generation to the other is nothing but inheritance. Here, both parents contribute equally to the inheritance of traits.
It was Gregor Mendel, known as the Father of Genetics, who conducted immense research and studied this inheritance of traits.

Rules of Inheritance
Gregor Johann Mendel was a scientist who is recognized as the Father and Founder of genetics. Mendel conducted many experiments on the pea plant (Pisum sativum) between 1856 and 1863.
He studied the results of the experiments and deducted many observations. Thus, laws of inheritance or Mendel’s laws of inheritance came into existence.

All the above-mentioned topics are described in an interactive and efficient manner so that the students could easily understand them.

*** Top Apps from Toppr to drive Better Results:- Check Here::
📱 Toppr App link - https://play.google.com/store/....apps/details?id=hayg
✍🏿 Get your homework answers here (Toppr Answr) - https://play.google.com/store/....apps/details?id=com.
🔓 Unlock your doubts with Toppr Plus - https://play.google.com/store/....apps/details?id=hayg.plus

Welcome to Toppr Study!! The most leading “LIVE” youtube channel - We come up with innovative solutions which will help students (who are preparing for CBSE Class 10, CBSE Class 9) in multiple aspects of their educational journey.🎯 Every class is gonna be a fun-filled experience with the most passionate “Faculty Teachers” to make your learning super fun. Just give it a try, you won't regret it!!

📢 We the “TOPPR” is everything you need to bring yourself in "TOP"!!

🌍 To know more, visit our website: https://www.toppr.com/

☑️☑️ Like and Follow us on social media:
🔶 Instagram - https://www.instagram.com/mytoppr/
🔶 Facebook - https://www.facebook.com/BeingToppr/

Let us know your doubts regarding today's topic "Heredity and Evolution | CBSE Class 10 Science Chapter 9 (Biology) | Toppr Study" in the comment below 👇 we will respond to solve your doubts asap. See you guys in the ⏭️ next surprising session! Till then stay tuned...