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Ronch [10]
3 years ago
6

Some rivers no longer reach the ocean because

Biology
1 answer:
diamong [38]3 years ago
4 0
Pretty sure the correct answer is D
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RNA synthesis is always 5' to 3' because: A. the unwinding of the double-stranded DNA can only move one direction B. the structu
avanturin [10]

Answer:

The correct answer is option E. "nucleotides can only be added to an available 3'-OH group on the transcript terminus".

Explanation:

RNA synthesis is catalyzed by an enzyme called RNA polymerase. RNA polymerase always catalyze the synthesis of new RNA from 5' to 3' because nucleotides can only be added to an available 3'-OH group on the transcript terminus. This has been confirmed in labeling experiments with γ-32P substrates which establish the presence of a triphosphate moiety in transcripts with either pppG or pppA.

7 0
3 years ago
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A person infected with the human immunodeficiency virus may have any symptoms for a period of time. During this period, the viru
podryga [215]

Answer:

It effects the body by causing symptoms like muscle aches, low-grade fever, headaches, sometimes rashes, swelling of the lymph glands may also occur, and flu-like illness. These are symptoms after a few weeks of being infected.

5 0
3 years ago
Help i Will give brainliest needs to be submitted today
Valentin [98]
  1. Flowers are living plants that grow if they have water and sun                           2. without a lot of sun the flower will not be able to grow as tall and properly 3. flowers have a certain part that the bees collect to there hive in order to keep there colony growing                                                                  1. cones have a certain shape that make them easier to identify them from other parts of nature 2. Pine cones only come from pine trees, although all conifers produce cones. 3. Gymnosperms are a group of plants who have naked seeds, not enclosed in an ovary.                                      1. spores may consist of one or several cells (but do not contain an embryo) and are produced in large numbers 2. Some germinate rapidly, others 'rest', surviving unfavorable environmental conditions.                             3.Spores are formed by ferns, horsetails, mosses, fungi and bacteria.
6 0
3 years ago
What are the wavelike contractions of smooth muscle that move food down the esophagus called
stiks02 [169]

When you swallow food, it doesn't just drop down into your stomach. Muscles contract in a wave-like motion to move the food along through the esophagus. This muscle movement is called, peristalsis, or peristaltic waves. These peristaltic waves contract behind the food bolus pushing it along the digestive tract.

7 0
3 years ago
Producers are usually the first organisms listed in a food chain. They provide energy to the other organisms in the food chain.
Sliva [168]

Hi!

The answer is C. The Sun

The energy that producers get from the sun, along with water, allows them to begin photosynthesis, the process in which they make their food, because they are not able to absorb other forms of energy because they are plants.

I hope this helps!!

5 0
3 years ago
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