BIOLOGY HIGH SCHOOL

Describe an early monotreme mammal.

Answers

Answer 1
Answer: Monotremes are egg-laying mammals. The young are not born, but hatched.

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The rocky material left behind by a retreating glacier forms what is called a moraine. When primary succession occurs on a moraine, which life-forms will help create the soil by breaking down bare rock?
Which would provide the body with the most energy?a. Carrying oxygen from the lungs to the cellsb. Breaking the bonds in a disaccharidec. Breaking a single carbon bondd. Creating bonds to make a simple sugar
Humans breathe through bronchi. What structure do insects have for breathing? A. gills B. tracheae C. skin D. lungs
What secies reproduce rapidly in a new habitat due to lack of parasites and predators that would control the population
You dilute your bacteriophage for plating 10^-6. You mix 0.1ml of the bacteriophage dilution with 0.3ml of bacteria and plate with top agar. The next day you count your plaques. You get 46 pfu at this dilution. What is the final concentration (pfu/ml) of the phage stock?

What is the pH range of highly acidic substances?

Answers

pH stands forthe power of hydrogen. pH that ranges form 1-6.9 are acid substances. At pH 1 -2.9, the substance is highly acidic. At pH 3 - 4, the substance is mildly acidic.At pH 4.1 – 6.9, the substance is weakly acidic. At pH 7, it is neutral. At pH7.1-14, it is basic. At pH 7.1 - 10.9, the substance is weakly basic. At pH 11- 13, the substance is mildly basic. At pH 13.1 – 14, the substance is highlybasic.
The pH is acids are 1-7, while 7 is neutral. 

The highly acidic substances are ranging between 1 and 3, while 1 is the MOST acidic. 

Assume that you transform bacteria with a plasmid containing an ampicillin-resistance gene. Instead of directly plating the transformed population as you did in this lab, you set up two liquid cultures of them, one that contains ampicillin and one that does not. You will then assay these cultures on plates at two different times: immediately after you set up the cultures, and then again after the bacteria have been in culture for an extended period. The assays will demonstrate the number of ampicillin-resistant vs. ampicillin-sensitive culture bacteria in each culture at each time. To perform each of the two assays, you prepare serial dilutions of the two cultures and plate them onto LB plates with and without ampicillin (the dilution) is simply to ensure that you will get some plates on which you can distinguish separate colonies).Describe what you expect to observe in the initial assay and in the second assay. What, if any, differences might you expect in terms of the ratios of ampicillin-resistant and nonresistant bacteria?

Answers

In the initial assay with ampicillin, there will still be, although in a smaller number, nonresistant bacteria that have survived incubation. After an extended period, ampicillin will kill all nonresistant bacteria and in the second assay, only ampicillin-resistant bacteria will survive.

Choose all the answers that apply. Which of the following minerals can be scratched with a fingernail? -talc
-diamond
-topaz
-quartz

Answers

Talc is the mineral which can be scratched with a fingernail and is therefore denoted as option A.

What is Talc?

This is a mineral which consists of elements such as the following listed below and is often used as lubricants.

  • Magnesium
  • Silicon
  • Oxygen etc.

Fingernail is stronger which is why it can be scratched by it unlike the other minerals mentioned in the options.

Read more about Talc here brainly.com/question/24082743

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the answer is Talc, it can be scrached with a finger nail, all the others are harder than a fingernail

In addition to their circular chromosome bacteria also have smaller rings of DNA calledA. RNA.
B. genes.
C. cells.
D. plasmids.

Answers

I would go with answer choice D. plasmids.

Select all that apply. What is the difference between DNA and RNA?
a.) DNA is a protein and RNA is a nucleic acid.
b.) DNA uses deoxyribose and RNA uses ribose.
c.) DNA has adenine and RNA has thymine.
d.) DNA has thymine and RNA has uracil.

Answers

B and D are the best answers

If a scientist is observing biotic and abiotic factors, which of the following level of organism must she be studying? A. An individual organism
B. A community
C. A population
D. An ecosystem

Answers

A because an ecosystem includes all the living and nonliving things within an area :)
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The function of the bacteria in the food web is to be the1. Decomposer 2. Invasive species 3. Apex predator