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Semenov [28]
2 years ago
15

Nucleic acids are composed of:

Biology
1 answer:
lozanna [386]2 years ago
6 0

Answer:

a phosphate group, a pentose sugar, a nitrogen base

Explanation:

nucleic acid is a polymeric macromolecule made up of repeated units of monomeric 'nucleotides' composed of a nitrogenous heterocyclic base which is either a purine or a pyrimidine, a pentose (five carbon) sugar (either ribose or 2′-deoxyribose), and one to three phosphate groups.

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Organisms may play only one role in an ecosystem true or false
anyanavicka [17]
This is false. Organisms may play several important roles in an ecosystem. Consider for example and ocean shore environment occupied by a particular species of crab. The crabs are scavengers and eat any organic matter they encounter. They therefore play an important role in the cycling of nutrients in the ecosystem. The crabs are however also an important source of food for a range of other species occupying the same habitat, including octopi, certain fishes and sea otters. Therefore, the crabs are an important part of the food web in the ecosystem. Many species similarly occupy multiple important roles in an ecosystem.
4 0
2 years ago
Is all the options increase, which ones would serve to remove CO2 from the atmosphere?​
levacccp [35]

Answer:

A. Photosynthesis

Explanation:

Photosynthesis is a process in plants produce food materials by absorbing carbondioxide from the atmosphere which decreases the concentration of carbondioxide in the atmosphere. In photosynthesis reaction, plant take water from the soil and carbondioxide from the atmosphere in the presence of sunlight produces glucose and oxygen. Glucose is stored in different parts of plant such as grains, stem and roots while oxygen is released in the atmosphere.

8 0
3 years ago
Jamal drew a flow chart to show how the carbon in his brain tissue originated as co2 in the atmosphere. interpret his model.
bezimeni [28]

We have heard about Respiration. In human beings, respiration is a cellular activity which takes place in the presence of oxygen and in result produces carbon dioxide. Jamal model is a clear manifestation of that process. Medulla is the region of a brain that controls the respiration activity. When we breathe we take in oxygen and the excess amount of carbon dioxide is removed from out body.

Brains cells have capability to detect the carbon concentration in blood and add excess amount of carbon from body to the air.  


8 0
2 years ago
#1. Which of the following structures would you expect to find in a single-celled organism? A. internal organs B. legs and feet
qwelly [4]
1. outer covering - none of the other answers can occur due to the absorbed solutions inability to reach the centre of the organism, smaller cells in greater numbers are more efficient as they can group together yet all absorb the right amounts of nutrients for its need. multi cellular organisms, such as humans can have the other answers in them as cells group together to make skin, muscles and organs. it also gives the organism to grow larger.

2. bacteria are single celled. bacteria reproduce through mitosis (cell division). bacteria break down decaying matter to obtain energy. every organism requires energy to live. Bacteria can move in order to reach their nutrient source.


6 0
3 years ago
I think it’s tree am I right?
astraxan [27]

Answer:

mm yes tre.........

Explanation:

7 0
2 years ago
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