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Rainbow [258]
3 years ago
8

PLEASE HELP!!!

Biology
1 answer:
mars1129 [50]3 years ago
5 0

Answer:  B:17,190 years

Explanation: After 5730 years ( first half life) 70 /2 = 35 mg decays and 35 g remains left. After another 5730 years ( two half lives or 11460 years) 35 /2 = 17.5mg decays and 17.5 g remains left . After another 5730 years ( three half lives or 17190 years) 17.5 /2 = 8.75mg decays and 8.75g remains left.

i know this is off topic but, can you go to my quetions, to see if you can answer any?(or if you know anyone who can answer them)

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ziro4ka [17]

Answer:

Sperm cannot be delivered to the urethra.

Explanation:

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7 0
2 years ago
When traits are inherited separately it is called?​
harkovskaia [24]
Cross over? i have no idea lol
6 0
2 years ago
A team of scientists splices a human gene into bacterial plasmids. The human gene codes for insulin. Then the scientists use the
Inessa [10]

Answer: D. The genes for antibiotic resistance help the transformed bacteria survive in their environment.

Explanation:

First and foremost, we should note that plasmids used in the delivery of DNA typically consists of genes which helps in antibiotic resistance.

Based on the question given, we should note that the genes for antibiotic resistance help the transformed bacteria survive in their environment. This is because cells that have been treated with plasmid are able to survive and grow compared to those that have not been treated with plasmid which are eventually killed by the antibiotic.

8 0
2 years ago
You own a winery in Napa Valley. An assistant accidentally leaves the lid for a vat of wine slightly ajar. Would the yeast insid
anastassius [24]

<span>When the lid for a vat of wine is slightly open, the yeast inside can continue to perform alcoholic fermentation because the carbon dioxide produced by the yeast during fermentation will act as a blanket over the wine.  Nevertheless, the air around the fermenter must be still and enough carbon dioxide should be produced to continue alcoholic fermentation. However, at some point, carbon dioxide will fall and can no longer protect the wine. This is the right time to get your wine covered before it will be vulnerable to undesirable microorganisms. </span>

Therefore, open fermentation is good in the early stages of fermentation because yeast need oxygen to synthesize sterols and assimilate fatty acids to ensure the nutrients it needs to multiply and ferment the 70% of the sugar from the fruit. Furthermore, the yeast is responsible in decomposing sugar from the grapes into alcohol and carbon dioxide.

4 0
3 years ago
Which of these example of chemical change? Breaking glass melting ice on the windshield burning gasoline denting a bumper
mihalych1998 [28]
Your answer is burning gasoline. if you think about it, none of the rest of the answers really involve chemicals. ice isnt known as a chemical, and so isnt glass. and if your dent a bumper, it doesnt make sense to add it as a chemical change. so your answer is burning gasoline. hope this helps.
3 0
3 years ago
Read 2 more answers
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