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DerKrebs [107]
3 years ago
7

The Cretaceous-Tertiary extinction, the most famous of the Big Five, has been attributed to what major event(s) that triggered t

he extinction of the dinosaurs? an asteroid hitting the earth massive volcanoes erupting around the world rapid growth of forests on land surfaces falling sea levels increased competition from mammals
Biology
2 answers:
polet [3.4K]3 years ago
5 0

This question has a two part answer. The first part is that an asteroid hitting the earth and the second part is massive volcanoes erupting around the world.

inna [77]3 years ago
3 0

Answer:

The correct answers are "an asteroid hitting the earth" and "massive volcanoes erupting around the world"

Explanation:

The Cretaceous-Tertiary extinction was an event that take place approximately 66 millions years ago responsible of taking the life of about three-quarters of the plant and animal species on Earth. Two different events are the ones that contributed to this massive extinction: an asteroid hitting the earth and massive volcanoes erupting around the world. The asteroid was 10 to 15 km wide, impacted on Mexico's Yucatan Peninsula, and caused global environmental damage. This damage inlcude triggering the eruption of most active volcanos in the world.

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Some substances are transported within the cell or across membranes with membranous sacs what are these structures called?
Jet001 [13]

Answer:

Vesicle

Explanation:

A vesicle is a spherical organelle of a cell that looks like a sac. Vesicle can be used to move things inside cytosols such as enzyme, protein, or waste material. When vesicle carrying enzyme, its often called lysosomes. The vesicle can also dump material outside the cell by fusing with the cell membranes.

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3 years ago
I need help on those two questions
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4 0
3 years ago
Carbon chains are principal features of both carbohydrates and lipids.what is the primary difference between these two types of
solong [7]
While both carbohydrates and lipids are made up of carbon, hydrogen and oxygen there are several differences:

1. Carbohydrates are chains of 2 or more carbon atoms.  These can be very lengthy (like long cellulose chains of glucose units). They have many polar OH groups (e.g. glucose - C6H6O6). Most carbohydrates are hydrophilic and are soluble in water because of their polar OH groups. They are not necessarily sugars nor are they necessarily sweet. They are also important components of DNA, RNA and ATP.

2. Lipids are more diverse in their chemistry. They generally have a polar region at one end (this end attracts water) and a large non polar hydrocarbon region that repels water. Lipids don't dissolve in water and instead clump together with their hydrocarbon regions on the interior. Lipids include oils, fatty acids, waxes, steroids and hormones.
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3 years ago
The substance in red blood cells that carries oxygen is in medical terms?
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3 years ago
What is stem cell therapy?
Lemur [1.5K]

Answer:

Stem cell therapy is a non-invasive treatment that aims to replace damaged cells within the body. Mesenchymal stem cell therapy can be deployed systemically via IV or injected locally to target specific sites, depending on patient needs.

Explanation:

Stem cell therapy is a form of regenerative medicine designed to repair damaged cells within the body by reducing inflammation and modulating the immune system.  This phenomenon makes stem cell therapy a viable treatment option for a variety of medical conditions.  Stem cell therapies have been used to treat autoimmune, inflammatory, neurological, orthopedic conditions and traumatic injuries with studies conducted on use for Crohn's disease, Multiple Sclerosis, Lupus, COPD, Parkinson's, ALS, Stroke recovery and more.

3 0
2 years ago
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