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otez555 [7]
3 years ago
10

Which continent or continents did the Homo ergaster occupy 1.6 million years ago?

Biology
1 answer:
nlexa [21]3 years ago
4 0
Homo ergasrer lived in Africa 1.6 million years ago
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Can someone please help me with this? Thanks so much!
Leona [35]

1. aabb, (made by ab x ab)

2. green and smooth

3. 3/16, (combinations would be AAbb, Aabb, and Aabb)

4. 1/16

5. 1/16 (only 1 AABB)

6. 4/16 (4 with AaBb)

5 0
3 years ago
Compared the endocrine system, the nervous system is __________.
velikii [3]
The nervous system can respond quickly to stimuli, through the use of action potentials and neurotransmitters. Responses to nervous system stimulation are typically quick but short lived. The endocrine system responds to stimulation by secreting hormones into the circulatory system that travel to the target tissue.
4 0
3 years ago
What is the correct structure for 7-bromo-5-octyn-3-one?
Ede4ka [16]
The correct structure is shown below,

According to rules the longest carbon chain is selected, and numbering is started from side nearer to carbonyl group. As the parent name goes to ketone, so among alkyne and halogen second priority is given to alkyne and 3rd to halogen

So, the name shoul carry following words,

3- one (for ketone)

5-yne (for Alkyne)

7-Bromo (for Halogen)

Result:
           So the structure is as follow,

4 0
3 years ago
In a famous experiment, Matthew Meselson and Franklin Stahl grew E. coli cells in a medium containing only the "heavy" isotope o
Alex777 [14]

Answer:

3rd generation = 2 Hybrid DNA molecules + 6 Light DNA

In Percentage 2÷8 × 100 = 25%

25% of the DNA are hybrid

Explanation:

Semi conservative model proposed by Watson and Crick states that one strand of the DNA comes from parent DNA which act as a template for the other newly formed strand.

First generation:

If cells containing 15 N DNA are transferred to a medium with only 14 N then in initial first generation two parent strands becomes separated and act as template for newly synthesized strands. this means that in first generation both DNA molecules are hybrid, one strand of 15 N DNA and other strand of 14 N DNA

Ist generation = 2 Hybrid DNA molecules

Second generation:

In Second generation these two hybrid molecules become unzip. Two strands are 15N and two strands are 14N. All these 4 strands act as template and 4 new strands are synthesized. The molecules of Hybrid DNA is still 2 with 2 molecules of Light DNA.

2nd generation = 2 Hybrid DNA molecules + 2 Light DNA

Third generation:

In Third generation these two hybrid molecules and two light DNA molecules become unzip. Two strands are of 15N and six strands are of 14N. All these 8 strands act as template and 8 new strands are synthesized. The molecules of Hybrid DNA is still 2 with 6 molecules of Light DNA.

3rd generation = 2 Hybrid DNA molecules + 6 Light DNA

In Percentage 2÷8 × 100 = 25%

25% of the DNA are hybrid

4 0
4 years ago
Which best describes the role of nitrogen in the human body?
Lesechka [4]

Answer:

C. Makes energy in cells

Explanation:

Nitrogen has the role of making energy in cells of the human body.

7 0
4 years ago
Read 2 more answers
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