BIOLOGY MIDDLE SCHOOL

Three examples of bacteria billions of years ago

Answers

Answer 1
Answer:

three examples of bacteria billions of years ago are the coccus, bacillus, and spirochete

Answer 2
Answer:

Final answer:

Bacteria billions of years ago played a critical role in shaping the Earth's atmosphere and the development of life. Cyanobacteria, archaea, and stromatolites are examples of bacteria from that time.

Explanation:

Billions of years ago, bacteria played a crucial role in shaping the Earth's atmosphere and the development of life. Some examples of bacteria that existed back then include:

  1. Cyanobacteria: These ancient bacteria were the first organisms capable of photosynthesis, releasing oxygen as a byproduct and contributing to the oxygenation of our planet's atmosphere.
  2. Archea: Certain types of archaea bacteria, such as methanogens, were present and played a role in the early carbon cycle, producing methane gas.
  3. Stromatolites: These are fossilized bacterial mats found in ancient rocks, providing evidence of early bacterial life and their important role in Earth's history.

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Which fats should we limit our intake of? Why?

Answers

Saturated and trans fats are bad fats, and unsaturated fats are bad, but not as bad.

Choose all the answers that apply.In some flower species, pink flowers are recessive and yellow flowers are dominant. A pink flower:
has two recessive genes
has one dominant and one recessive gene
has two equally dominant color genes
has a phenotype of pp
has the same genotype as a yellow flower

Answers

Answer:

A and D are the correct answers.

Explanation:

A recessive gene can be defined as the one that can be masked by a dominant. In this case, the dominant gene causes the pink color.

The phenotype refers to the characteristics that can be seen by people, for example the shape, the color, among other things.

Due to this, options A and D are the answers.
The correct answer is 'has two recessive genes'. Since pink flowers are recessive, a pink flower must have two recessive genes in order for it to be pink. If there is even one dominant gene, the flower will be yellow. It is also true that the flower will have a phenotype of pp, since both genes are recessive and must be lowercase. Sorry; I didn't read the question carefully enough. : )

Hope this helps!

3. Most organisms benefit from trees because they produce what as a resultof photosynthesis?

A. oxygen
B. carbon
C. nitrogen
D. carbon dioxide

Answers

Answer:

B. Oxygen

Explanation:

Answer:

A. Oxygen

Explanation:

During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

Hope it helps :)

What is air currents caused by temperature differences

Answers

Air currents, or thermals, can be caused by differences in temperature, pressure, or impurity concentration. Temperature differences can cause air currents because warmer air is less dense than cooler air, causing the warmer air to appear "lighter."

Which of the following characteristics is common to organisms in Kingdom Eubacteria? A. live without oxygen B. live in less extreme environments than most archaebacteria C. live in the hottest and coldest places on Earth D. are multicellular

Answers

B. They live in less extreme environments as Archaebacteria

Archaebacteria live in harsh environments. , in the hottest and coldest placed on earth, plus Eubacteria are single cellled.

Eubacteria, unlike Archaea, generally live in less extreme environments. They are unicellular, prokaryotic, lack nuclei, and unlike many Archaea, cannot live without oxygen.

Organisms in the Kingdom Eubacteria, also known as the domain Bacteria, are unicellular prokaryotic organisms without nuclei.

Compared to organisms in the domain Archaea, which often thrive in extreme environments, organisms in Kingdom Eubacteria generally live in less extreme environments, making option 'B' the correct answer to your question.

They are found in variety of habitats and can adapt to a broad range of conditions, but they do not typically favor the same harsh, extreme environments that many Archaea do.

They also lack the adaptation to live without oxygen seen in some prokaryotes, like certain Archaea.

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The total number of atoms of each element is not changed during a chemical reaction.

Answers

That is definitely true. That's why in chemistry we spent a whole two weeks on balancing chemical equations
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