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taurus [48]
3 years ago
14

Sections of an mRNA molecule that are removed:

Biology
1 answer:
VMariaS [17]3 years ago
6 0

Answer:

Most pre-mRNA molecules have sections that are removed from the molecule, called introns, and sections that are linked or together to make the final mRNA, called exons.

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Which statement is not true?
iogann1982 [59]

Answer:

A. Specialized cells are made up of tissues

Explanation:

Cells make up tissues, tissues make up organs, organs make up organ systems and organ systems make up an organism.

All the other options are correct, but cells are not made up of tissues.

Hope this helps!

5 0
3 years ago
State the differences in compositionof blood between the aorta and main vein
Ad libitum [116K]

Answer:

The placenta is a unique vascular organ that receives blood supplies from both the maternal and the fetal systems and thus has two separate circulatory systems for blood: (1) the maternal-placental (uteroplacental) blood circulation, and (2) the fetal-placental (fetoplacental) blood circulation. The uteroplacental circulation starts with the maternal blood flow into the intervillous space through decidual spiral arteries. Exchange of oxygen and nutrients take place as the maternal blood flows around terminal villi in the intervillous space. The in-flowing maternal arterial blood pushes deoxygenated blood into the endometrial and then uterine veins back to the maternal circulation. The fetal-placental circulation allows the umbilical arteries

Explanation:

3 0
2 years ago
Read 2 more answers
The equation below represents a summary of a biological process.
sergejj [24]

Answer:

the answer is chloroplasts

Explanation:

5 0
2 years ago
When energy is released from sugar molecules,many by - products are formed.Which by - Product is expelled from the cell?
NikAS [45]

The right answer is CO2.

The degradation of glucose is either by respiration or by fermentation. In breathing we have a release of CO2.

Respiration refers to both gaseous exchange resulting from inhalation and expiration of the air (CO2 carbon dioxide release and oxygen O2 absorption) and cellular respiration that allows, by degrading glucose through oxygen , to obtain energy.

5 0
3 years ago
Read 2 more answers
Describe the relationship between biotic and abiotic factors in marine ecosystems.
inysia [295]
Biotic factors include plants, animals, microbes, etc. The important abiotic factors include the amount of sunlight in the ecosystem, the amount of oxygen and nutrients that is dissolved in the water, temperature, etc. Sunlight is one of the most important abiotic factors for marine ecosystems.
8 0
2 years ago
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