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dalvyx [7]
3 years ago
15

The students are performing an experience that involves chemicals.

Biology
2 answers:
n200080 [17]3 years ago
4 0

Answer:

your answer will be D. wearing approiate labotary attire

Explanation:

The student clearly has no gloves on may hurt themselves doing the lab teacher should've had told the kids the rules and what to expect and what to do

Novosadov [1.4K]3 years ago
4 0

Answer:

The correct answer will be option-D.

Explanation:

A scientific experiment involving chemicals must be performed with precautions as chemicals can cause serious health problems like carcinogens causing cancer.

The laboratory attire of a lab includes a face mask to cover mouth, a pair of goggle to protect eyes, hand gloves to protect hand and a laboratory coat to protect body and clothes.

Since in the given question, the hand gloves and laboratory coat are missing, therefore, option-D will be considered the most valid answer.

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An electron microscope would be used for if
rewona [7]

Answer:

Electron microscope would be used for if,

C) details of cell structures needed to be distinguished.

Explanation:

  • The general principal of electron microscopy is analogous to light microscopy except that it uses electrons to analyse the specimen instead of light.
  • Electron microscopy focuses a beam of electron on the target sample and records the difference in absorption by different surfaces.
  • Electron microscopy is used to get the detailed structure of cells and surface features of various viruses and bacteria.
  • However, it is not possible to view living biological samples through electron microscope because high velocity electron have immense energy to kill living cells.
  • These samples are thus, fixed and then viewed.
6 0
3 years ago
Which of the following statements about drug resistance is FALSE?
ZanzabumX [31]

Answer:

The false statement is e. It is found only in gram-negative bacteria.

Explanation:

Drug resistance is a condition that is usually developed in bacteria because of the wrong use of medicines. This condition can cause a mutation and can be transferred with horizontal gene exchange, that does not require breed and it can happen between two grown bacteria. As it happens in all species of bacteria, therefore it's not only found in gram-negatives.

8 0
3 years ago
Please Help!!
NARA [144]
1) all of the above
2) rocketry
3) 1
4) not sure about this one because magnitude of one was the brightest then 2, then 3. 6 was the least brightest and 6+ or -1 or 0 or you could say, below 1 did not exist at that time..
6 0
3 years ago
Read 2 more answers
In a particular family, one parent has Type A blood, the other has Type B. They have four children. One has Type A, one has Type
AlladinOne [14]

Answer:

The correct answer is -

Parental genotypes: AO & BO

Children genotypes: AB, AO, BO, and OO

Explanation:

In the human blood group system, more than two types of alleles are present that lead to the existence of four blood groups in the human population.

Here, A and B alleles are co-dominant while the O allele is recessive to both A and B alleles in the ABO system.

The cross depicting the genotypes of children is

IA IO

IB    IAIB    IBIO

IO   IAIO   IOIO

In this cross, we get the same result as given in the question -

One parent has A and the other has B type blood while the children have all four types of blood groups One has Type A, one has Type B, one has Type AB, and the last has Type O. It is possible only when parents are heterozygous in their genotypes and not expressing codominance.

6 0
3 years ago
Which of the following is an advantage of sexual reproduction over asexual reproduction?
jekas [21]

Answer:

1. Leads to mixing of genetic materials hence variation within species

2. Leads to offspring with hybrid viguor that tend to show high and adaptability to environmental conditions.

3. Variations due to sexual reproduction leads to improvement of species hence evolutionary changes that may bring about specialisation

5 0
3 years ago
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