If a strand of dna has the sequence aagctc, transcription will result in a or an _______

Which organisms are responsible for absorbing carbon from the atmosphere?

Serga [27]

The organisms which are responsible for absorbing carbon from the atmosphere is the trees and plants.

Plants are known as predominant photosynthetic eukaryotes which are mainly multicellular. They are found in the kingdom Plantae. Plants were treated as of the two kingdoms which included all living things that were not animals.

Fungi and algae were treated as plants. Green plants have cell walls which contain cellulose. They get their energy from the sun via the process of photosynthesis.

7 0

2 years ago

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One of your lab partners has followed the recommended procedure of running Gram-positive and Gram-negative control organisms on

andreyandreev [35.5K]

Answer:

Reduced in holding time of decolrization step and also used less Alcohol because decolrization step is important in Gram's staining.The decolorization step must be performed carefully. Otherwise over-decolorization may occur. This step is critical and must be timed correctly otherwise the CV stain will be removed from the Gram-positive cells. If the decolorizing agent is applied on the cell for too long time, the Gram-positive organisms to appear Gram-negative..

Explanation:

Gram' staining is a technique used in microbiology labs to differentiate between Gram's positive and negative

Gram-positive bacteria :Stain dark purple due to retaining the primary dye called CV in the cell wall.

:Gram-negative bacteria Stain red or pink due to retaining the counter staining dye called Safranin or neutral red.

There are four basic step in Gram" staining

1) Application of the Primary Stain to a Heat-Fixed Smear of Bacterial Culture

2)Addition of Gram's Iodine

3)Decolorization with 95% Ethyl Alcohol:Alcohol or acetone dissolves the lipid outer membrane of Gram-negative bacteria, thus leaving the peptidoglycan layer exposed and increases the porosity of the cell wall. The CV-I complex is then washed away from the thin peptidoglycan layer, leaving Gram-negative bacteria colorless.

On the other hand, alcohol has a dehydrating effect on the cell walls of Gram-positive bacteria that causes the pores of the cell wall to shrink. The CV-I complex gets tightly bound into the multi-layered, highly cross-linked Gram-positive cell wall thus staining the cells purple.

The decolorization step must be performed carefully. Otherwise over-decolorization may occur. This step is critical and must be timed correctly otherwise the CV stain will be removed from the Gram-positive cells. If the decolorizing agent is applied on the cell for too long time, the Gram-positive organisms to appear Gram-negative. Under-decolorization occurs when the alcohol is not left on long enough to wash out the CV-I complex from the Gram-negative cells, resulting in Gram-negative bacteria to appear Gram-positive.

7 0

2 years ago

You are called for a young man who was diving head first off a dock into a lake. Bystanders say he struck his head on the bottom

castortr0y [4]

Answer:

Answer is C. Damage to C3, C4 or C5.

Explanation:

C1 - C7 are used to represent the number of vertebrae found at the cervical region of the vertebrae canal or column. The vertebrae column comprises off various vertebrae that protect the spinal cord,which starts from the neck region to the tail region.

The C3, C4 and C5 are at the midsection of the cervical region of the spine , and they provide support for the neck and the head.

These vertebrae contain nerves which if affected will cause a serious pain. which can actually affect his breathing. Because, the spinal nerves around the spinal cord are linked to the brain.

7 0

3 years ago

When a drug enters the body via oral ingestion, smoking, snorting, or injection, the chemicals move through the bloodstream and

Anna007 [38]

Answer:

Blood Brain Barrier(BBB)

Explanation:

This is a biological interface of special endothelial cells of astrocytes, pericytes , capillaries, neurons and other structures, acting as a physical barrier or gate separating the Central Nervous system from the peripheral blood circulations. Thus it formed a tight junction serving as a physical barrier to selectively regulate the entrance of substances from the cerebral blood flow into the brain, therefore maintaining homeostasis of the brain.

From above any substances absorbed into the blood stream irrespective of the mode of entry are transported through the BBB, and are selectively regulated to enter the brain cells by the BBB's interactions with the blood vessels, hormones etc.

Basically it allows the passage of nutrients, a few drug, hormones and resists certain toxins and pathogens for the brain homeostasis.

5 0

3 years ago

Which of the following is NOT a characteristic of animals?

coldgirl [10]

Hmm, learning about this what a while back, but i would say (1)

4 0

2 years ago

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If a strand of dna has the sequence aagctc, transcription will result in a or an ________.