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umka2103 [35]
3 years ago
14

Most species of cyanobacteria are enclosed in a _____.

Biology
2 answers:
tigry1 [53]3 years ago
8 0
Mucilaginous sheath is the correct answer
aliina [53]3 years ago
7 0

Answer: mucilaginous sheath

Explanation:

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All life on Earth started as unicelluar, prokaryotic organisms. Which of these structures was vital for organisms to develop in
lara [203]

Answer:

nucleus

Explanation:

Nucleus are the brain of the cells which control the behaviour, metabolism, and interaction with others.

7 0
3 years ago
PLEASE HELP ASAP I WILL GIVE BRAINLIEST!!!!!!!
viktelen [127]

Answer:

D

Explanation:

D the red and white alleles are expressed independently of each other. You know this because roan is when both red and white are present. So therefore, because of this, the cow can be red, white, or both depending on what alleles are present.

3 0
2 years ago
Area measuring 5 m² contains 50 earthworms what is the population density of the earth worms
Darina [25.2K]

The density of a population of living organisms is usually measured in individuals on one square km. In here we have 50 earthworms on an area of 5 square meters, thus we have 10 earthworms on every square meter. In order to get to the result we need to see first how many square meters there are in one square km. One square km has one thousand meters of length and one thousand meters of width so:

1,000 x 1,000 = 1,000,000 km²

Since we established that we have 10 earthworms on every one square meter, we just need to multiply the number of square meters with the amount of earthworms on every square meter:

1,000,000 x 10 = 10,000,000

So we have a density of 10 million earthworms per square km.

7 0
3 years ago
DNA compaction into chromosomes is dependent upon a family of proteins called histones. These essential DNA organization protein
irinina [24]

Answer:

Explanation:

The history protein H2A, H2B, H3 and H4 forms an octamer ( 2 each of the four histones) around which the DNA is wrapped. They help in packaging the DNA allowing for compaction of the DNA

Linker histone H1 and a length of DNA (linker DNA) links two nucleosomes together and they also play essential role in chromatin strucrure, stabilizing it and also modulating accessibility of the DNA to biological processes.

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Mention the name of four groups of important pathogenic E. coli? Can TBX medium be used to recover all types of nonpathogenic an
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<h3>What is Escherichia coli?</h3>

The pathogenic E. coli or Escherichia coli serotypes are grouped on the basis of their mechanism of causing symptoms in humans. The six groups of pathogenic E.coli are enteropathogenic, enterotoxigenic, verocytotoxigenic, enteroinvasive, enteroaggregative and diffusely adherent E. coli.

Luria broth (LB) is one of the most commonly used growth medium for E. coli. It promotes fast growth of the organism and also provides good plasmid yields, making it an excellent choice for most laboratory applications, especially the small-scale plasmid preps.

Learn more about E.coli here:

brainly.com/question/13553402

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