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KengaRu [80]
3 years ago
14

How do treatments for viral and bacterial illnesses affect healthy cells?

Biology
1 answer:
o-na [289]3 years ago
6 0
Antibiotics can kill both the healthy and infected cells making the immune system more weak
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What is secondary succession?
GuDViN [60]
Secondary succession is a process started by an event (example forest fire) that reduces an already established ecosystem
3 0
3 years ago
Why aren't there many large carnivores?
Anika [276]

Answer:

Technically, the largest ever marine predator known thus far - the blue whale - is, for now, alive and well, but I know what you mean. You’re not talking about filter-feeders, or fish-eaters, you mean macropredators.

The last truly enormous macropredator in our oceans was probably Carcharocles megalodon, which went extinct about 3.6 million years ago. Other recent examples include the terrifying sperm whale Livyatan melvillei (which disappeared 8.9 mya) and other megatoothed sharks like C. chubutensis.

So, why did the giants go away? The answer, in truth, is likely multi-faceted. Here are some major promising hypotheses, or at least contributing factors:

Whales have declined. Giant sea carnivores like C. megalodon and Livyatan relied on marine mammals - specifically baleen whales. During the Pliocene, the Americas connected and the Central American Seaway was closed. This seems to have triggered a significant decline in the diversity of tropical whales, and would thus limit food availability for huge, energy-hungry predators.

Things got too cold. The extinction of megalodon and other giant ocean predators roughly coincides with the trend of decreasing temperatures the Pliocene brought. Giant sharks in particular, not being fully warm-blooded, would suffer from this, and it would also mean a decline in food supply. You can even see a sudden cold snap just about when Carcharocles went extinct, 3.6 mya.

Smaller predators outcompeted them. The niche of Carcharocles and the macroraptorial sperm whales is arguably still filled today - by the killer whale. Many orca pods specialize in hunting whales or other marine mammals. However, killer whales and their ancestors were perhaps more opportunistic, fast, intelligent and indeed adaptable than the massive, solitary hunters.

Ironically, the largest ever marine predator owes its existence to the demise of the largest ever marine macropredators. Since the extinction of macroraptorial sperm whales and Carcharocles megalodon, baleen whales have been gradually increasing in size, for they no longer need to be as fast and agile. Because of this, we have the privilege of sharing our world with the largest animal known to have ever lived - the blue whale.

8 0
3 years ago
Definicion del nivel celular
olga2289 [7]

Answer:

Se llama el nivel celular que se compone de células. Mientras tanto, una célula es la unidad estructural y funcional más pequeña que puede reproducirse independientemente en un ser vivo. Las células suelen ser microscópicas.

Explanation:

6 0
3 years ago
Excisions performed within the Musculoskeletal system are categorized based on ____.
Yanka [14]

Answer:

Excision category (20150-20251) codes are for the biopsies of muscle and bone. The codes are divided based on the type of biopsy (muscle, bone), the depth of the biopsy (superficial, deep), and, in some codes, the method of obtaining the biopsy (e.g., percutaneous needle).

Explanation:

hope it will help you

7 0
2 years ago
What would happen if more forests are cut down?
Vikentia [17]

Answer:

Life could get harder

Explanation:

Forests are habitats for animals and also food for both humans and animals so if they were to get cut down it could take some time for everyone to find what they need and forests also produce oxygen as well so without enough forests or trees to produce oxygen bad things could happen.

4 0
3 years ago
Read 2 more answers
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