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OLEGan [10]
3 years ago
10

What are four eras in the history of life on Earth.

Biology
2 answers:
Brrunno [24]3 years ago
8 0
This is the answer ,refer the pic

Monica [59]3 years ago
7 0
Pre-Cambrian Era. Earth formed and became a planet 600-3,300 million years ago.
Paleozoic Era. Ancient life. Volcanoes and mount formed.
Mesozoic Era. Middle life (Industrial Ages, Evolution of human technology)
Cenozoic Era. Present life
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Ideas for question 6)? Thank you! This is regarding genes, DNA, stuff like that.
9966 [12]

Answer:

designer babies!

Explanation:

messing with genetics for preferred traits will inevitably be an expensive thing to do, so it could result in a generation of 'perfect' babies that we're genetically engineered, but that only the wealthy can afford to have. extremely unethical, even though it may start with good intentions (disease resistance, for example).

4 0
3 years ago
A pea plant is heterozygous for Tallness. What gametes will it produce?
Lyrx [107]
Answer: Tt

Why? Heterozygous mean two different genotypes, meaning you need both dominant and recessive. So Tt

Hope this helps :D
6 0
3 years ago
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Which situation would be most likely to cause a DNA mutation?​
Alexxx [7]

Answer:

Acquired (or somatic) mutations occur at some time during a person's life and are present only in certain cells, not in every cell in the body. These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if an error is made as DNA copies itself during cell division.

Explanation:

6 0
3 years ago
Which statement about phloem is true? *
Ivan

Answer:

2. It carries water from the roots to the leaves.

Explanation:

Phloem is the vascular tissue in charge of transporting and distributing organic nutrients.

4 0
3 years ago
Help me ALL of these, and you get brainiest! (:
Evgen [1.6K]

Answer:

1. Circulatory System

2. Respiratory System

3. Endocrine System

4. Nervous System

5. Urinary/ Excretory System

Explanation:

1. Circulatory System- The heart pumps blood and blood vessels such as arteries and veins, transports the blood to every part of our body providing organs and muscles with nourishment.

2. Respiratory System- This system maintains our breathing. It supplies the body with oxygen for cellular respiration.

3. Endocrine System- The glands of the endocrine system secrete chemicals called hormones that regulate most of the processes in our bodies like growth, reproduction, metabolism, etc...

4. Nervous System- The entire nervous system controls all of the other systems of the body and it also transmits information to the brain, such as pain and external sensations.

5. Urinary/Excretory System- This system is responsible for eliminating waste products of metabolism and other materials from the body that are of no use.

5 0
3 years ago
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