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jeyben [28]
3 years ago
12

What technological advancement was necessary before scientists could begin to observe cells?

Biology
2 answers:
VLD [36.1K]3 years ago
5 0
Yeah thats correctomundo
Lady bird [3.3K]3 years ago
4 0
The microscope. Scientists were able to observe tiny parts of cells since they are not visible to the naked eye.
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irga5000 [103]

A) Some members of the Euglenoids lose their photosynthetic pigment when left in Dark : TRUE

B )The loss of photosynthetic pigment in Euglenids stored in the dark is permanent : False

<h3>What are Euglenas</h3>

Euglenas are unicellular organisms belonging to the kingdom Protista, when kept in the dark for too long Euglenoids begin to lose their chlorophyll. As it loses its chlorophyll it becomes unable to produce its own food and starts consuming bacterias within its habitat.

The loss of chlorophyll in Euglenids can be regained after it is been exposed to sunlight and allowed  to grow exponentially for several weeks.

Hence we can conclude that  Some members of the Euglenoids lose their photosynthetic pigment when left in Dark : TRUE  while The loss of photosynthetic pigment in Euglenids stored in the dark is permanent : False

Learn more about Euglenoids : brainly.com/question/1278307

8 0
3 years ago
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Answer:

Place a filter funnel on the top of a conical flask.

Roll the filter paper into a cone and place it on the flask.

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Wait till all the sand is left over in the filter paper and all the water has been separated.

(You could also heat the sand in a warm oven to remove any water remaining)

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3 years ago
Do antimicrobials affect bacteria or do bacteria affect antimicrobials?
Blababa [14]

Answer:Antibiotics disrupt essential processes or structures in the bacterial cell. This either kills the bacterium or slows down bacterial growth. Depending on these effects an antibiotic is said to be bactericidal or bacteriostatic.

6 0
3 years ago
Albinism is a recessive trait in humans that is controlled by a single gene. How many recessive alleles must a person have to ha
olga_2 [115]
Answer;
Two recessive alleles are the number of alleles that a person must have to have albinism.

Explanation;
When a trait is recessive, such as albinism, an individual must have two copies of a recessive allele to express that particular trait. Recessive alleles are denoted by a lowercase letter , such as b versus B. Only individuals with a bb genotye will express a recessive trait, hence, the offspring must receive one recessive trait from each parent to exhibit the recessive trait. 

6 0
3 years ago
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evablogger [386]

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