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Jobisdone [24]
3 years ago
10

Analysis of the second swab has confirmed that the causative organism is Streptococcus pyogenes, a gram-positive organism. Imagi

ne that you are the technician looking at the Gram stain from Shelly's culture. What would you expect to see as you look through the microscope?
pink, rod-shaped organisms arranged in pairs

purple, spherical-shaped organisms arranged in grapelike clusters

pink, spherical-shaped organisms arranged in chainlike formations

purple, spherical-shaped organisms arranged in chainlike formations
Biology
1 answer:
sdas [7]3 years ago
6 0
<h2><em>Streptococcus pyogenes</em></h2>

Explanation:

On looking through the microscope we will see purple, spherical-shaped organisms arranged in chainlike formations.

The reasons are:

  • Streptococcus pyrogenes is a gram positive bacteria and hence it will take up Gram's stain and appear purple in color.
  • Streptococci are colonial bacteria that are spherical in structure arranged in chain like formations.

<em>Streptococcus pyogenes </em>usually inhabit the skin of humans and are causative organisms of several infections such as tonsilitis, pharyngitis cellulitis, dermal infections etc.

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LekaFEV [45]

Answer:

monkeys

Explanation:

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2 years ago
The amino acids in bacteria and plants can be classified in families based on the precursor molecule in the synthesis pathway of
raketka [301]

The given question is incomplete, the complete question is attached in the image format with the answer:

Answer:

1. aspartic acid :

asparagine

methionine

lysine

threonine

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glutamine

proline

arginine

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3. pyruvic acid :

alanine

valine

leucine

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4. chorismic acid :

phenylalanine

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3 0
2 years ago
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5 0
2 years ago
Read 2 more answers
All of the following are adaptations that organisms in rocky intertidal zones use to avoid predators EXCEPT _____________
Andrej [43]

Answer:

Release of large numbers of eggs/sperm into the water during reproduction cycles.

Explanation:

Adaptation may be defined as the change in the physical, physiological and chemical changes in the organisms that helps them to survive in their environment.

The organisms living in the rocky intertidal zone shows adaptations as they are more darker in color and has simple body organisation. The algae,crabs and snails live in the intertidal zone. They have small number of offspring that protect them from the predators.

Thus, the answer is release of large numbers of eggs/sperm into the water during reproduction cycles.

3 0
3 years ago
6. A scientist measures the circumference of acorns in a population of oak trees
melisa1 [442]

Answer:

6. 2 cm

8. Greater than 2 cm and less than 2 cm

Explanation:

Complete Question

6. A scientist measures the circumference of acorns in a population of oak trees and discovers that the most common circumference is 2 cm. What would you expect the most common circumference(s) to be after 10 generations of stabilizing selection?

-2 cm

-Greater than 2 cm or less than 2 cm

-Greater than 2 cm and less than 2 cm

-Can't tell from the information given

8. Refer to question 6, but this time answer what you would expect after 10

generations of directional selection.

-2 cm

-Greater than 2 cm or less than 2 cm

-Greater than 2 cm and less than 2 cm

-Can't tell from the information given

Solution -

6. In an stabilizing selection, the average trait of a given population is favored over extreme values. Hence, it can be said that one specific trait is over presented in a given population. For example – uniform human birth weight, number of eggs a bird lay etc.  

Here in this case if most common circumference is 2 cm , then the tree population will try to have this trait as a stabilizing trait.  

Thus, option A is correct

8. In a  directional selection, the genetic variation decreases as per the environmental change. And hence the average trait will not be selected. Instead traits either higher or lower the average values will be preferred.  

Thus, option C is correct

3 0
3 years ago
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