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Lorico [155]
3 years ago
5

Suppose that you are staining an old culture (more than 24 hrs) of Gram-positive organisms. How will the age of the culture affe

ct the staining results? Why?
Biology
1 answer:
STatiana [176]3 years ago
7 0

Answer:

the old bacteria start to loose proteins of their membrane

Explanation:

In a healthy cell, the environmental surrounds it, will no cause lost of proteins, but as the cell get old, by natural means, the proteins  responsible to be stain using the violet color for stain, will be less, so in way you can confuse the result of gram positive into gram negative, even is a positive bacteria but with lack of proteins.  

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Like gymnosperms, many grasses and angiosperm trees are wind-pollinated. To conserve energy, these angiosperms do not produce co
lutik1710 [3]

Answer:

C. petals

Explanation:

A)fruits

B)sepals

C)petals

D)anthers

E)ovaries

<em>The part that will not be necessary in wind pollinated angiosperm is the petals .</em>

The petal is a part of flower that is usually colorful and primarily function by attaracting insect pollinators to the flower.

<u>Since wind pollinated angiosperms do not need to attract insect for pollination, they do not need the colorful petals. They rely on wind to carry their pollen from their anthers to their stigmas (pollination).</u>

Hence, the correct option is C.

6 0
3 years ago
A biologist is studying the possible role of earthworms on the fertility of farm soils. As part of this research, the number of
dimaraw [331]

Answer:

Taking more samples from different parts of an acre.

Explanation:

Validity and accuracy of the data is crucial for any serious research. In this particular case, the most accurate data would be obtained if earthworms would be counted on the whole acre. Of course, this would consume lot of time, people, money etc. That's why methods for estimation are used. Estimation best works with large number of samples. Since one acre equals over 4000 square meters, taking only five samples from such a big area is simply not enough for obtaining valid data.

One of the possible ways to improve estimation is to take more samples per acre while avoiding taking adjacent samples because it could be possible that number of earthworms in one part of an acre is increased (or decreased) for any reason, which would lead us to wrong conclusion.

8 0
4 years ago
Which of the following is not a component of a virus
xeze [42]
Tail section .......
6 0
3 years ago
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Smooth muscle cells are found in the walls of hollow organs

8 0
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5 short multiple-choice questions that I have been stuck on for half an hour now!! PLEASE HELP ME!!!!! :(
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