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3 years ago

: The correct order of stages in primary succession of a volcanic island is

Biology

1 answer:

miskamm [114]3 years ago

8 0

Answer:

Volcanic rock-lichen-mosses-sea grasses

Explanation:

Lichens are complex living beings that form a symbiosis of an organism formed by a fungus and an algae or cyanobacterium. They're known for interacting with volcanic rocks. Moss is a cosmopolitan phylum of small, simple-organized, and non-vascular cryptogamous plants that typically grow in dense tufts, which are more common in humid and dark habitats. They're the ones to come after the lichens during primary succession of volcanic island environments. Marine angiosperms, also known as, sea grasses, are the flower-producing plants adapted to life in seawater that form marine meadows on the euphotic bottoms of the oceans. They install themselves on the coasts that are populated by mosses, therefore not being uncommon to see in volcanic islands.

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A. 4 examples of macronutrients B. 2 examples of micronutrients

vovikov84 [41]

Answer:
Macronutrients: water, fat, carbohydrates, protein
Micronutrients: minerals, vitamins

Explanation:
The six types of nutrients humans need are water, fat, carbohydrates, protein, minerals, and vitamins.

Macronutrients are nutrients we need in large amounts (macro- means big).
Micronutrients are nutrients we need in small amount (micro- means small).

Consider what you eat in a day, you (should) be getting all of these.

It's recommended you have about 8 cups of water a day, which is a large amount.
Fat and carbohydrates are used as sources of energy and are consumed in large amounts.
Proteins (meats, nuts) used to build muscle are also eaten in large amount.

Minerals and vitamins have recommended intakes of milligrams (mg) which is a very small amount. They are found in traces in our food. For example, you would not fill your entire palm with calcium and eat it. You only need small amounts of calcium (probably in your milk).

5 0

3 years ago

The shortest phase of the menstrual cycle is

Brrunno [24]

The Ovulatory Phase i should know

8 0

3 years ago

Which of the following has mechanical energy? Battery Burger bun Drawn bow Sunlight

Vladimir79 [104]

Drawn bow because the flexing of the bow and the increased tension in the bow string contain the energy expended by the archer’s muscles transferred to the bow. The energy is transmitted to the arrow when then it’s released. All this is mechanical energy.
The other items in the list have potential electrical energy (battery), locked energy in the nutrients released during digestion (bun), electromagnetic energy (sun).

7 0

3 years ago

Read 2 more answers

You know that (1) both

adoni [48]

Complete question

It has to be E. coli because it is positive for gapA
It can't be Salmonella, because it is negative for the invA marker but still makes people sick
It has to be used because it is positive for the apeE marker

Answer:

1. It can't be Salmonella, because it is negative for the invA marker but still makes people sick

A combination of positive results from the multiplex PCR inva, apee and gapa is used to definitively identify Salmonella.
Pathogenic, or disease causing Salmonella is definitely not present, as inva is required for it to be pathogenic. The test did not detect the inva sequence, thus it is truly negative for this particular pathogen.

2. It has to be E. coli because it is positive for gapA

E. coli may be present, as gapa was detected- a presumptive positive. However, this may need to be definitively determined through further methods of sample analysis, such as 2D-gel electrophoresis.
apee may belong to another type of bacteria present within the initial sample, or there may be sample contamination

Explanation:

Polymerase chain reactions, PCRs are a form of nucleic acid amplification testing NAAT that exploit the mechanism of transcription by using a thermostable DNA polymerase. These require a sample of genetic material such as RNA or DNA; specific regions of the gene sequence are targeted for replication by primers. In the presence of these specific gene sequences, the primers make billions of copies of the sequences.

However, if these gene sequences are absent, the primers are not capable of identifying and amplifying the sequence. This reaction is highly specific. Positives obtained have a high chance of being true positives and negatives have a high chance of being true negatives .

Pathogens or infectious agents that are capable of causing disease i.e. making people sick. Both E. coli and Salmonella are genuses of enteric bacteria capable of causing disease via fecal contamination. Common symptoms include

abdominal cramps
vomiting
fever
diarrhea

This test would include primers for the detection of each sequence: gapa, apee, inva. Salmonella's inva was not detected, thus it is not present.

Further steps may include a 2 D gel electrophoresis- here an electrical current is utilized to separate bands of DNA within the sample. This should correspond with an expected DNA size in base pairs or bp for E.coli- this should be determined by running the sample in the gel with a positive control, containing genetic material for E coli, and a negative control, of purified water to determine contamination.

7 0

4 years ago

What is an Igneous Rock?

juin [17]

Answer:

rock that forms when melted rock (magma, lava) cools and hardens

Explanation:

Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.

Brainliest plz

8 0

3 years ago