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kvv77 [185]
3 years ago
13

During phagocytosis of one cell to another, the larger cell engulfs the smaller cell by enclosing it in a part of its plasma mem

brane which then pinches off so the cell is then within the larger cell. Given this may have been the process that brought bacterial cells into the ancestors of eukaryotic cells as endosymbionts, what structural characteristics might be expected in mitochondria and chloroplasts?
Biology
1 answer:
sergey [27]3 years ago
3 0

Explanation:

Phagocytosis is the process by which cells ingest large particles, including other cells, by enclosing the particles in an extension of the cell membrane and budding off a new vesicle. During pinocytosis, cells take in molecules such as water from the extracellular fluid.

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During what stage of complete cellular respiration is most of the atp produced
Sveta_85 [38]
During the last and final stage where there is a possibility of 30-36 ATP production rate
6 0
3 years ago
How do positive and negative feedback loops differ?
Lesechka [4]

Answer:

Positive and negative feedback differs in that positive feedback loops increase the initial signal, while negative feedback loops decrease the original signal (option d).

Explanation:

Feedback is a process that, applied to biological systems, allows for the changes needed to maintain homeostasis.

  • Negative feedback loop occurs when a stimulus is presented, producing a change in the body, so the response is to stop the change that is occurring. It is the most frequent type of feedback and has the greatest impact on homeostasis.                                                                                                          An example of negative feedback is a decrease in body temperature through sweating.
  • Positive feedback loop occurs when the stimulus produces a change and promotes a response that reinforces that change.                                           The classic example of positive feedback is the secretion of oxytocin, promoted by uterine contractions, whose effect is to increase those contractions, allowing labor.

<em>In summary, </em><u><em>positive feedback loop acts by increasing an action or signal in the body, while the negative feedback loop reduces or stops the action or signal that occurs</em></u><em>.</em>

7 0
3 years ago
How many stages are in meiosis ii?
bekas [8.4K]
The end result is production of four haploid cells (n chromosomes, 23 in humans) from the two<span> haploid cells (with n chromosomes, each consisting of </span>two<span> sister chromatids) produced in </span>meiosis<span> I. The four main </span>steps of Meiosis II<span> are: Prophase </span>II<span>, Metaphase </span>II<span>, Anaphase </span>II<span>, and Telophase </span>II<span>.</span>
5 0
3 years ago
A plasmid _____________________________ . A. can confer antibiotic resistance to a bacterium. B. is a single-stranded circular D
hodyreva [135]

Answer:

The correct answer will be option A.

Explanation:

The bacteria organize its genetic material in the single circular chromosome suspended in the cytosol along with additional circular double-stranded DNA molecule called plasmid.

The plasmid is present as a separate structure in the cytoplasm which performs important functions during stressful conditions in the bacteria like providing antibiotic resistance to the bacteria, formation of filial factors during conjugation and many others.

The plasmid which confers resistant to the bacteria is known as the R-plasmid. The R-plasmid consists of r-determinants which confers antibiotic resistance to the bacteria and resistance transfer factor (RTF) which helps in plasmid transfer.

Thus, option A is the correct answer.

7 0
4 years ago
Why is cartilage a good tissue of choice for the respiratory structures of the larynx, trachea, and bronchi?
Brrunno [24]

Answer:

Cartilage is a type of connective tissue formed of two types of cells, chondrocytes and chondroblasts, and an abundant, highly specialized and vascular extracellular matrix. It is a good tissue of choice because it has the function of supporting soft tissue (tracheal rings, for example), lining the joint surfaces of bones, and promoting the formation and growth of long bones.

Hyaline cartilage is the most common cartilage in the human body. It has a cool translucent bluish-white color and is responsible for the formation of the temporary skeleton in fetal development until this skeleton is replaced by bone tissue. Found mainly supporting the nasal passages, the trachea, and the bronchi, at the ventral end of the ribs and covering the articular surfaces of the long bones.

6 0
3 years ago
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