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3 years ago

Corals feed on eachother true or false

2 answers:

8 0

False. <span>Adult corals are sessile organisms, i.e. they don't move around. They are tiny organisms whose shells are what we generally see.</span>

Dennis_Churaev [7]3 years ago

8 0

Answer:

The given statement is false.

Explanation:

Corals obtain their food from the living algae present in their tissues or by catching and digesting prey. The majority of the reef-forming corals exhibit a specific association with tiny algae known as zooxanthellae. The algae thrive within the coral polyps, utilizing sunlight to produce sugar for energy.

This energy is mediated towards the polyp, offering much-required nutrition. In return, the coral polyps offer the algae with a protective home and carbon dioxide. Corals also consume tiny floating species known as zooplankton.

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While he was studying, Matthew was suddenly overwhelmed by feelings of intense apprehension. For several minutes he felt so agit

Usimov [2.4K]

Matthew was suffering an anxiety attack, this is proven with his feelings of being "overwhelmed.. feelings of intense apprehension". He was experiencing shortness of breath due to how he was feeling.

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3 years ago

Before being transported, vladek translates a package for another prisoner. this prisoner is now jewish. what other reasons coul

weqwewe [10]

If they are Jewish and they attempt to stand up to the nazi

5 0

3 years ago

A) How does HIV bind to a host cell?

Taya2010 [7]

1. The correct answer is: The viral envelope proteins interact with CD4 and a co-receptor on the cell membrane.

Binding and entering the host cell are the first steps of the HIV virus infection. So, these steps play a major role in determining the ability of HIV to degrade the human immune system. Binding of HIV to CD4+ T lymphocytes (express chemokine receptors CCR5 and CXCR4 called co-receptors) triggers the fusion of the viral and host cell membranes, initiating infection (viral core gets into the cytoplasm).

Attachment of the virion can be:

• Nonspecific-envelop protein of the virus (Env) binds to cell-surface heparan sulfate proteoglycans

• Specific-Env binds to integrin.

2. The correct answer is: Activation of the host cell by cytokines, growth factors, or antigens.

After the viral capsid enters the cell, single-stranded RNA genome is released from the attached viral proteins and copied it into a complementary DNA (cDNA) molecule thanks to an enzyme called reverse transcriptase. Next step is the integration of the viral DNA into the host cell's genome. This process is done by another viral enzyme called integrase. The integrated DNA is transcribed into RNA and then translated into proteins that will help the package of new viruse particles.

3. The answer is: false

Reverse transcriptase is an enzyme that catalyzes the formation of DNA from an RNA template. Since the genome of the virus (HIV) is single stranded RNA, reverse transcriptase copies it into a complementary DNA (cDNA) molecule. Thanks to this enzyme, formed cDNA can be integrated into host’s genome. Because of this proprety, antiretroviral drugs used to treat HIV infection work as reverse-transcriptase inhibitors.

7 0

3 years ago

How many grams of CaCl2 are in 0.75M solution with a volume of 1L

grandymaker [24]

83.235 grams of CaCl2 is required to make 1 litre of 0.75M solution.

Explanation:

Molarity or molar concentration is the number of moles of solute that can be dissolved in 1 L of a solution.

let us find the number of moles

n=C*V Concentration is 0.75M

Volume is 1000ml.

n= 0.75*1

n= 0.75

This means there are 0.75 moles of CaCl2 in 1000 ml of solution of .75M.

Molar mass of CaCl2 is = 40.08+ 2(35.5)

= 110.98 gms

Thus 1 MOLE OF CaCl2 weighs 110.98

so 0.75 moles will weigh 110.98*0.75

= 83.235 grams of CaCl2 is required to make 1 litre of 0.75M solution.

4 0

3 years ago

The first stage of cellular respiration (Glycolysis) occurs in _________.

harina [27]

Answer: Option B. Cytoplasm

Explanation:

Cellular respiration is defined as the process in which sugar break down take place into as form and utilized by cell in the form of energy. In Cellular respiration food is utilized to create ATP and further used as energy source by using oxygen, and named aerobic respiration

There are four stages of cellular respiration includes first is glycolysis, second is pyruvate oxidation, third is citric acid cycle, and forth is oxidative phosphorylation.

Glycolysis is the first stage of cellular respiration which takes place in cytoplasm or cytosol.

In the process of Glycolysis six-carbon sugar undergo chemical changes and converted into two pyruvates, each containing three-carbon organic molecule. ATP and NADH are formed in this reaction.

Hence, the process take place in cytoplasm.

4 0

2 years ago