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WINSTONCH [101]
3 years ago
12

Myofibrils are made primarily of

Biology
1 answer:
Nadusha1986 [10]3 years ago
5 0

Answer:

A) actin and myosin  is a correct answer.

Explanation:

  • Myofibrils are the contractile fiber and they are made of actin and myosin.
  • Myofibrils are made of thick myofilaments and thin myofilaments.
  • Thick myofilaments are made up of myosin whereas thin     myofilaments are composed of actin.
  • The functional unit of muscle is Myofibrils and contraction of muscle occurs due to myofibril, when the filaments actin and myosin interact with each other.

Thus Myofibrils are made primarily of (A) actin and myosin.

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A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 5 million years. How many years
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Answer:

20 million years

Explanation:

If we have a neutral mutation rate of one mutation per 5 million years, then the total of eight mutation between the two different species would be 20 million years. This is because both species will have 4 mutations in those 20 million years, so combined, both by 4, will have 8 mutations between them. So few mutations on so much time will result in two species that are very similar to each other even after 20 million years of evolution, even making them hardly distinguishable, especially if it comes to defining fossil records from them both. A nice example of this are the members of the felidae (cat) family, which are all very closely related, and are almost identical, thus making it extremely hard to distinguish two species of the same or similar size by their fossils.

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4 years ago
A test that combines radioactive chemicals and antibodies to detect minute quantities of substances in a patient's blood?
nirvana33 [79]

Radioimmunoassay (RIA) is a test that combines radioactive chemicals and antibodies to detect minute quantities of substances in a patient's blood.

In 1959, biophysicist Rosalyn Yalow and physician Solomon A. Berson developed a sensitive method for measuring very small amounts of a substance in the blood called radioimmunoassay (RIA).

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It is very sensitive that it can measure concentrations up to 0.001 μg/ml.

To know more about radioimmunoassay: brainly.com/question/25654772

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5 0
1 year ago
n a certain plant species, the allele for wrinkled seeds (W) is dominant to the allele for smooth seeds. What is the phenotype r
NeTakaya
Make a punnet square

W W
w Ww Ww

w Ww. Ww



All wrinkled seeds, no smooth seeds but they are all carriers for the smooth gene
5 0
4 years ago
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1. What did Linnaeus use to classify living things?
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Answer:

Perhaps the single greatest contribution Linnaeus made to science was his method of naming species. This method, called binomial nomenclature, gives each species a unique, two-word Latin name consisting of the genus name and the species name. An example is Homo sapiens, the two-word Latin name for humans.

Explanation:

Can I have brainliest

It is from Google

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olchik [2.2K]

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east west

Explanation:

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