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Len [333]
3 years ago
11

Large complex cells with a nucleus

Biology
1 answer:
Ymorist [56]3 years ago
6 0
Eukaryotic cells are large complex cells with a nucleus

eukaryotic cells
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Mutations in two important cancer-critical genes, encoding p53 and Rb, respectively, are commonly found in cancers. What type of
yuradex [85]

Answer:

Germline mutations

Explanation:

Mutation in the cancer critical genes leads to the formation of stable mutant protein whose accumulation leads to the origin of cancer cells. Mutant p53 proteins not only lose their tumor suppressive activities (P53 gene is a tumor suppressive gene) but often gain additional oncogenic functions that allow for uncontrolled division of cells allowing increased growth and survival advantages. the same also goes for the retinoblastoma gene which is also a tumor suppressor gene that regulates cell division and other cellular activities. This mutations are usually inherited and can be transfered to their offspring.

4 0
3 years ago
Which animals are the oldest vertebrate fossils?
bezimeni [28]

Answer: Armored fish

Explanation:

The earliest known fossil vertebrates were heavily armored fish discovered fish in rocks from the Ordovician period.

The fossils shows the path from the early aquatic life to the vertebrates, vertebrates to mammals.

The fossils shows that it is vertebrate and are the oldest known fossil ever known. The fossils of the animals and plants helps to known the behavior of the past time and based on that research and study is done.

8 0
3 years ago
Following repolarization, the neuron may become slightly hyperpolarized before it re-establishes its resting membrane potential.
RoseWind [281]
<h2>Membrane potential </h2>

Explanation:

  • Membrane potential represents charge difference across the membrane, all biological cells are negative inside (cytoplasm) and positive outside (due to difference in ionic distribution)  
  • In a typical neuron cell membrane potential of cytoplasm is negative at rest (when no stimulus is applied) hence called resting membrane potential
  • Resting membrane potential of excitable cells is established by Na+ and K+pump
  • Repolarization starts with the efflux of K+ by the opening of voltage gated K+ channels
  • Voltage gated K+ channels starts to open when voltage gated Na+ channels becomes inactive
  • Hyperpolarization occurs due to excessive efflux of K+ by voltage gated K+ channels
  • Additional efflux of K+ occurs due to slow inactivation of voltage gated K+ channels
3 0
3 years ago
Living organisms contain many complicated molecules. Which of these is a reason that carbon is important in these molecules? A.
Alex17521 [72]
D....carbon can also form triple and quadruple bonds
7 0
3 years ago
Which of the following ecosystems would contain the GREATEST Biodiversity?
uysha [10]

Answer:

Explanation:

A rainforest ecosystem containing thousands of different species of plants, animals, and birds. The reason why is because it has the most diverse species of wildlife. There is alot of DIVERSITY in that ecosystem, therefore it contains the greatest biodiversity.

7 0
3 years ago
Read 2 more answers
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