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IgorC [24]
3 years ago
6

Doctors sometimes use a vaccine to help prepare the body to defend itself against future infections. These vaccines most often c

ontain
Biology
2 answers:
kifflom [539]3 years ago
7 0
The answer is dead or weakened virus
lesya692 [45]3 years ago
4 0

Answer: weakened pathogens

Explanation:

Each vaccine contains a small amount of the disease germ (virus or bacteria) or parts of the germ.

A pathogen is a bacterium, virus, or other microorganism that can cause disease.

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Scientists once believed that modern-day reptiles were the only living descendants of dinosaurs, which were reptiles. Accumulati
Mrrafil [7]

This is the complete question

Scientists once believed that modern-day reptiles were the only living descendants of dinosaurs, which were reptiles. Accumulating fossil evidence has now suggested that the most recent dinosaurs gave rise to birds, making birds one of the closest living relatives of dinosaurs.

What statement provides the strongest evidence to support the claim that birds evolved from dinosaurs?

A. A fossilized rib cage of the semi-aquatic dinosaur Spinosaurus shows that it had lungs.

B. Fossils of the beaked dinosaur Ankylosaurus show that it had modified scales that produced hard, bony plates.

(C. Fossils of the winged dinosaur Archaeopteryx show that it had modified scales that produced feathers.) c is the right answer

D. A fossilized nest of the herbivorous dinosaur Brachiosaurus shows that it laid external eggs.

The correct answer is option C, that is, fossils of the winged dinosaur Archaeopteryx show that it had modified scales that produced feathers.  

<h3>What is Archaeopteryx?</h3>

Archaeopteryx is considered an intermediate fossil between the dinosaurs and modern birds.

With its amalgamation of reptilian and avian characteristics, it was long considered as the earliest known bird. It was found in 1860 in Germany, it is sometimes also called Urvogel, that is, the German term for a first bird or original bird.  

Thus, The correct answer is option C.

To learn more about Archaeopteryx click here:

brainly.com/question/17059171

#SPJ1

5 0
2 years ago
Why is a diet rich in protein very important to teens?
Anni [7]

I believe that the answer is that proteins help in the growth and development of the body.

Hope this helps! :)

5 0
3 years ago
Which conditions change igneous or sedimentary rock into metamorphic rock
Tpy6a [65]
Quite a bit of heat and pressure is needed to change an igneous/sedimentary rock to a metamorphic 


4 0
3 years ago
Scientists have discovered organisms that thrive in hot water that is 90°C (194°F) and do not need sunlight or oxygen to live. I
dimulka [17.4K]

Explanation:

your answer is Archaebacteria

7 0
3 years ago
Compare the stucture of a food web with a food chain
zvonat [6]

 food chain:The simplest representation of energy in a community. At the base is energy stored in plants, which are eaten by small organisms, which in turn are eaten by progressively larger organisms; the food chain is an oversimplification in that most animals do not eat only one type of organism.  

------------------  

food web:the interconnected feeding relationships in an ecosystem. These relationships can be complex; some organisms may feed on more than one trophic level, or changes may occur depending on a species' life history stages or the availability of food.

7 0
3 years ago
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