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2 years ago

Which organisms are not necessary for secondary succession to begin?

Biology

2 answers:

Blababa [14]2 years ago

5 0

I believe plants would be the answer

Korvikt [17]2 years ago

4 0

The first inhabitants are lichens or plants.

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ASAP The levels of water and salt in the blood are controlled by the ________, which is controlled by the ________.

kap26 [50]

Answer:

the hormone that regulates the salt and water levels is aldosterone found on the adrenal gland that sits above the kidney

Explanation:

6 0

2 years ago

What is the name of the process where a material that is weak enough to flow will rises when it is hot and sinks when it is cool

aksik [14]

Answer:

Convection process

Explanation:

The process of convection is commonly takes place in the mantle portion of the earth and also at the atmosphere.

This process is usually defined as the process where the materials are heated at a high temperature, thereby making them less denser, and due to their low density they are gradually pushed upward into the upper zones. As the materials rises up, the density gradually increases due to the lowering of the temperature, and then the materials again sinks. This give rise to the formations of a circulating cell, which are commonly known as the convection cells.

7 0

3 years ago

An acute non-contagious respiratory tract infection that produces severe pneumonia-like symptoms caused by bacteria that thrive

Darina [25.2K]

Streptococcus infection carries all the symptoms mentioned.

<h3><u>Explanation</u>:</h3>

<em>Streptococcus pneumoniae</em> and <em>Diplococcus pneumoniae</em> are the organisms that gram positive bacteria. These bacteria enters the respiratory system from droplet method propagation which is through aerosol or water droplet inhalation which are infected with these bacteria. These bacteria leads to the severe antigen antibody reaction inside lungs which leads to high rate of mucous secretion. This leads to formation of pneumonia.

These bacteria are mainly seen in tropical countries with warm climate and humid environment. These bacteria doesn't spread through contagious methods like touching. But the protection must be taken as these patients cough can contain lakhs of these bacteria which are enough to infect a healthy individual.

6 0

2 years ago

Read 2 more answers

How many grams of the compound in the figure above are required to make 1 liter of a 0.5 M solution? (Note: The atomic masses, i

Dafna1 [17]

Answer:

This question is incomplete as there is no figure in the question but the compound in the figure is Ethanoic acid (CH3COOH). Hence, we can calculate the mass.

The answer is: 30grams

Explanation:

According to the question, the volume of the compound (CH3COOH) is 1litre while the molar concentration is 0.5M

Molarity or Molar concentration is calculated using the formula:

M= n/V

Where; M= Molarity (M) = 0.5M

n= number of moles (mol)

V= Volume (V) = 1L

Hence, number of moles (n) = M × V

n = 0.5 × 1

n = 0.5 moles.

To calculate the mass in grams of CH3COOH, we say;

Number of moles (n) × molar mass (MM)

Since atomic mass for (C= 12, H= 1 and O=16)

Molar mass of CH3COOH:

= 12 + 1(3) + 12 + 16 + 16 + 1

Molar mass of CH3COOH = 60g/mol

Mass (in grams) of CH3COOH = 0.5 moles × 60g/mol

Mass = 30grams.

Therefore, 30grams of CH3COOH compound are required to make 1 liter of a 0.5 M solution.

6 0

3 years ago

Some algae demonstrate the phenomenon of alternation of generations, in which a multicellular, diploid, spore-producing organism

Leto [7]

Answer:

Option c. Only the haploid organism may also reproduce asexually.

Explanation:

It is scientifically approved that algae and fungi are able to form true asexual spores. This process of spore formation involves mitosis and resultant spore is called mito-spore which develop into new offspring.

Reference: Smith, B. A., and DANIEL D. Burke. "Evidence for the presence of messenger ribonucleic acid in Allomyces macrogynus mitospores." Journal of bacteriology 138.2 (1979): 535-541.

3 0

3 years ago