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Dmitrij [34]
3 years ago
15

What is the k-t extinction?

Biology
2 answers:
jolli1 [7]3 years ago
8 0
Sixty-five million years ago, more than three-fourths of all plant and animal species living on Earth becameextinct<span>. This event is known as the </span>K-T<span> mass </span>extinctionbecause it occurred at the boundary between theCretaceous<span> (K) and Tertiary (T) time periods. The most famous group of animals to perish was the dinosaurs.

Hope this helps :)</span>
Ede4ka [16]3 years ago
4 0
Lol you should make victoria brainliest what are you like 3 
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Protozoans are the only organisms that can convert nitrogen from the air into chemical compounds that plants can use.
tigry1 [53]

Answer: False

Explanation:

Protozoans are not the organism that fix nitrogen for the plants. The organism that fix nitrogen to convert it into a form which can be used by plants are known as diazotrophs.

These are bacteria and archae that fix nitrogen gas found in the atmosphere into more usable form such as ammonia.

These organism can grow without any external source of fixed nitrogen. Example: Rhizobia and azospirillium.

5 0
3 years ago
What are the phases of mitosis and meiosis and what do they do?
ehidna [41]
Prophase
Metaphase
Anaphase
Telophase

Meiosis is the process of cell division by which involving gametes. Cell division is just the same for sperm and egg cells, but they have distinguishable descriptions and labels in the process. Spermatogenesis is for the males’ sperm cells and oogenesis is the process for females’ egg cells. The cell division of meiosis involves the two phases, respectively meiosis I and meiosis II. Meiosis I like mitosis is the cell division that produces diploid cells<span>. These diploid cells are cells that contain a complete pair of chromosomes which is 46. The result is two diploid cells after the first meiosis. To provide clear explanation, in contrast haploid cells only contain 23 chromosomes and are created after meiosis II which is 4 in number. </span>
6 0
3 years ago
What are some possible consequences if transgenic salmon escape from their pens into the ocean population?
babunello [35]

Answer:

If the transgenic salmon escapes from their pens into the ocean population there are chances that they would compete with the wild salmons for food and space. They may also bring new diseases and changes to the food webs and ecosystem of the ocean.

Explanation:

A transgenic organism or genetically modified organism is the one that undergoes alternation through recombinant DNA technology.

No, I do not think that FDA should approve Aquabounty of growing and selling transgenic salmon since there is higher chance that they may interfere and disturb with the ecosystem and might also bring new diseases.

4 0
3 years ago
Your teacher assigns a STEM activity to the class. Each student must identify a current real-world issue that needs to be improv
vladimir2022 [97]

Answer: 4. Problem solver

Explanation: you're working to fix a known problem

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3 years ago
The cell cycle is a series of events that take place in a cell, leading to its growth, division and duplication. Cell division r
Crazy boy [7]
As ribosomes make their proteins, they may attach to the rough ER and insert the protein into the interior of the ER. The ER then begins folding the new proteins and transports them to areas in which chemical processing takes place
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3 years ago
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