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liubo4ka [24]
2 years ago
15

5. Fish use ___gills________ to breathe underwater. (However, many species of lobe-finned fishes that evolved during the Devonia

n period also had _____lungs_______________.) 6. In fossils, what anatomical evidence indicates that gills were present
Biology
1 answer:
marusya05 [52]2 years ago
7 0

Answer:

During the Devonian period which occurs 375 million years ago, gills are present in the fossil of tetrapods.

Explanation:

Gills present in tetrapods which able the marine animals to breathe inside water but with the passage of time the sac which is present around the gills convert into lungs and these tetrapods are able to live on the land. Examples of tetrapods are frog, lion, birds and salamander etc.

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Which two factors contributed to creating a truly global culture? a decrease in population growth rate improvements in telecommu
lora16 [44]

Answer:

1. Improvements in telecommunication

2. Improvements in global travel

Explanation:

Global culture refers to <u>the transmission of beliefs, values, and ideas around the world that has a significant impact in the behavior of society</u>. This has been evolving through time, especially since the Industrial Revolution. Today, we are capable of communicating with other people as quickly and easy as ever in the history of humanity and this will keep evolving as technology evolves as well.

This evolution is due to science and technology, especially to the improvements in telecommunication, which <u>enables us to communicate with people from other countries through calls, social media messagings, e-mails, etc.</u>, and to the improvements in global travel, which is <u>much more accessible today than it was before, allowing individuals to move from one country to the other easily and constantly and improving socialization between people from different cultures and backgrounds.</u>

5 0
2 years ago
Read 2 more answers
Iodine is a yellowish solution. A starch solution is white. A starch solution turns purplish-black in the presence of iodine. If
cupoosta [38]

Answer:

The correct answer will be- the color change will be observed and the solution will turn purplish-black.

Explanation:

Iodine test is performed to test the presence of the carbohydrates mainly starch.

The iodine solution is chemically called potassium iodide which forms a yellow solution. The potassium iodide solution forms a complex with a starch solution which appears a purplish-black color which shows the presence of the carbohydrates.

In the given question, if we add the iodine solution to the beaker after a certain point of time then it will still form a complex with the starch and thus beaker solution will appear darker in color.

6 0
2 years ago
Vegetation type of drought-resistant grasses also refers to a very dry climate, characteristic of southern russia, ukraine, and
g100num [7]
The vegetation type is called STEPPE. Steppe refers to the vegetation type in which there are only grassland plains; no trees exist in this eco-region. The countries of the world where this type of vegetation can be found include Russia, Ukraine, Hungary, etc. The steppe biome is a cold, dry grassland that exist in all the continents of the world except in Australia and Antarctica. Humidity level is usually very low in this biome because they are usually located far away from the ocean.
6 0
2 years ago
3. In what possible scenario would the female birds evolve to having the singing trait? (5 points)
Iteru [2.4K]

The possible scenario for singing traits in female birds will be about 26% in Generation 4 species

Explanation:

Singing trait have been common among both male and female birds and it is an ancestral traits. However, singing has been more sex-specific with male birds. Reasons for which birds generally sing are:

  • To attract the mates
  • While making nests and laying eggs
  • For the young birds to recognize their parents

However, various studies prove that the singing trait in female birds is reducing with increase in non-singing female birds over the years due to evolutionary course.

5 0
2 years ago
Which of these is the dependent variable?
melisa1 [442]

Answer:

The answer is B.

Explanation:

The variable is dependent meaning it stands on its own. the sentence "I skipped dinner" is a stand alone sentence meaning its the answer

5 0
2 years ago
Read 2 more answers
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