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weeeeeb [17]
3 years ago
9

Through which microscope were cells first observed

Biology
1 answer:
julia-pushkina [17]3 years ago
3 0
It was the Gallian Microscope 
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8. You have been asked to develop a safety plan
Lelechka [254]

A Safety Data Sheet refers to a detailed information document prepared by a manufacturer of  hazardous chemicals. It describes the physical and chemical properties of the product.

<h3>What is Safety Data Sheet?</h3>
  • A Safety Data Sheet refers to a detailed information document prepared by a manufacturer or importer of  hazardous chemicals.
  • Describes the physical and chemical properties of the product.
  • A safety data sheet provides comprehensive information about a chemical, including its properties physical, health, and environmental hazards; and  protective measures or safety precautions to be followed in handling, storing, or transporting materials.
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To learn more about Safety Data Sheet from the given link :

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6 0
1 year ago
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Which is not a topic of biology?
andre [41]
A. the distribution of sand on an ocean floor
3 0
2 years ago
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A cross between two squash plants that produce yellow squash results in 124 offspring: 93 produce yellow squash and 31 produce g
iVinArrow [24]

Answer:

<h2>Both Yy</h2>

Explanation:

1. As  given here,

Total offspring are= 124;

that produce yellow squash= 93;

that  produce green squash= 31;

2. Let Y  for yellow producing squash and y for green squash;

Y is dominant over y.

3. Cross between two yellow squash producing plants

Genotype of parents = Yy and Yy

offspring = YY, Yy, Yy and yy,

as Y is dominant over y, so YY and Yy all produce yellow squash, and yy  produce green squash.

4. Their phenotypic ratio is 3:1 , as in question 93: 31

4 0
3 years ago
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Suppose that part of an amino acid sequence of a protein changed from tyrosine-proline-glycine-alanine to tyrosine-histidine-gly
stira [4]

Suppose that part of an amino acid sequence of a protein changed from tyrosine-proline-glycine-alanine to tyrosine-histidine-glycine-alanine. This change was most likely caused by a point mutation called a <u>substitution</u>.

<u>Explanation:</u>

Any protein is synthesized by joining a number of amino acids together. This amino acid is placed based on the sequences of the DNA , for every 3 sequence there is an amino acid that is synthesized and therefore it is called as a triplet codon, since there may be many sequence for a single amino acid we call it as degenerate codon.

7 0
3 years ago
What processes must a metamorphic rock go through to become an igneous rock
Damm [24]
Metamorphic rock can change into igneous or sedimentary rock. Igneous rock forms when magma cools and makes crystals. Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool. I hope my answer has come to your help. God bless and have a nice day ahead!
8 0
3 years ago
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