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Phantasy [73]
2 years ago
9

How do the human respiratory and circulatory systems compare with the plant vascular system

Biology
1 answer:
Talja [164]2 years ago
3 0
Both have a pump that pushes materials throughout the organism.
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The 3 nucleotide mRNA sequence coding for a specific amino acid is called<br> a
Sveta_85 [38]

Answer:

im not really sure but i think its a codon , a codon is formed when nitrogeneous bases code for one amino acid

5 0
3 years ago
In DNA replication, continuously synthesis occurs on the leading strand Multiple choice question. toward the origin of replicati
Tamiku [17]

Answer:

toward the origin of replication

Explanation:

A replication fork is a structure formed during DNA replication when specific enzymes (i.e., helicases) separate both DNA strands at the origin of replication. DNA is always synthesized in the 5' to 3' direction, thereby DNA can be synthesized continuously on the leading strand, because the growth of this strand proceeds in the same direction as the movement of the replication fork, while DNA synthesized in several short segments on the lagging strand which are called 'Okazaki fragments'. DNA polymerases are enzymes that can only add nucleotides to the 3' end of a DNA strand, thereby they require the synthesis of short stretches of RNA or 'RNA primers', which are necessary for DNA replication of the lagging strand.

5 0
3 years ago
2. Bone
rodikova [14]

Osteoporosis causes bone density to decrease due to decreased osteoblast activity, increased osteoclast activity, and external factors like long-term medication. Option B. All choices are potential causes.

<h3>What are the factors that promote osteoporosis?</h3>

Let us first review what the bone cells are and their functions,

• Osteoprogenitores → in charge of osteocytes production

• Osteocytes → maintain the matrix

• Osteoblasts → Synthesize and secrete osteoid matrix that will later calcify

• Osteoclasts → Phagocytic cells in charge of osseous resorption and bone modulation.

Osteoporosis is a no-symptoms disease -silent- that causes a decrease in the bone mineral and mass density and might change the bone structure.

Osteoporosis weakens the bone until it breaks. So this affection becomes evident when a fracture occurs.

Several factors lead to osteoporosis development. Among them, we can mention,

  • genetic factors,
  • habits factors (lifestyle),
  • hormonal alterations,
  • drugs/medication

The increased rate of bone resorption is the major mechanism by which osteoporosis occurs. It deteriorates bone structure and decreases bone density.

Bone resorption and deterioration might be caused by

  • a decrease in osteoblast activity, leading to the decrease in osteoid matrix formation and calcification,

  • an increase in osteoclast activity, enhancing the activity of these phagocytic cells.

Other external factors also increase the probability of developing osteoporosis. Some of them are,

  • long-term medications (for instance, those used in cancer treatment)
  • excessive alcohol consumption and smoking
  • sedentary lifestyle
  • poor diet

According to this framework, the potential causes of the Osteoporosis are Decreased osteoblast activity, Increased osteoclast activity, Secondary to external factors like drugs/cancers.

Hence, <u>option B is correct</u>, All choices are potential causes.

You can learn more about osteoporosis at

brainly.com/question/8806251

brainly.com/question/9389623

brainly.com/question/7246059

#SPJ1

3 0
2 years ago
How is a society likely to address the problem of overuse of wildlife resources?
morpeh [17]

Answer:

Loss of biodiversity.

Explanation:

The resources that are made available to the people must be used in such a way that it is available to everybody in the present time and a bit of it must also be saved for the future.

The resources such as medicines, wood logs and other resources that is obtained from the wildlife resources will be lost if not used in a sustainable way.

3 0
3 years ago
Explain why primary ecological succession usually takes hundreds or thousands of years.
krok68 [10]
Primary succession is much slower than secondary succession because it begins where there is no soil. It can take several hundred to several thousand years to produce fertile soil naturally. The first pioneer species to colonize the bare rock will probably be bacteria and lichens, which can live without the soil.
7 0
3 years ago
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