Cell membranes have each of the following functions except for giving the cell a rigid, inflexible shape. Thus, the correct option for this question is A.
A cell membrane may be defined as a type of biological membrane which separates the inner surroundings of the cell with respect to the outer environment. It is semi-permeable in nature. It performs numerous functions for increasing the survival of an organism.
Cell membranes generally protect the inner content of the cell along with various organelles from the outer environment. It also regulates the movement of materials in and out of the cell either by simple diffusion or by transporters. It allows the easy passage of water into the cell.
Therefore, cell membranes have each of the following functions except for giving the cell a rigid, inflexible shape. Thus, the correct option for this question is A.
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The mass extinction that led to the loss of 96% of marine life and 70% of terrestrial life was most likely due to a supernova, an asteroid impact or Volcanic Eruption.
An extinction event is defined as a widespread and rapid decrease in biodiversity on Earth. Those events are characterized by sharp changes in the diversity and abundance of multicellular organisms that occur when extinction rates increase relative to background extinction rates and species evolution rates.
This mass extinction which happened during the end of the Permian era. The extinction of 96 percent of all marine species and 70 percent of all terrestrial species resulted in catastrophic changes on Earth, which became almost devoid of all species.
The cause of this mass extinction is related to volcanic activity, supernova or asteroid impact which could have increased the average temperature of the Earth's surface.
Thus, the mass extinction that led to the loss of 96% of marine life and 70% of terrestrial life was most likely due to a supernova, an asteroid impact or Volcanic Eruption.
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Answer:
due to volcanic eruption
Answer: For building amino acids, proteins and nucleic acids.
Explanation:
Living cells requires nitrogen because they are major part of amino acids. They form the building block of protein and nucleic acids such as DNA which carry the genetic information and is passed from generations to generations. Plants and animal need nitrogen for growth and survival. The protein is use for building and repairing muscles and it is a necessity for growth.
Nitrogen is crucial for all cells as it forms the backbone of amino acids, proteins, and nucleic acids which perform essential roles in cell function.
All cells require nitrogen as an essential component for living organisms as it is an essential part of amino acids, proteins, and nucleic acids. Nitrogen forms the backbone of these molecules, which are fundamental structural and functional elements in cells. Amino acids are the building blocks of proteins, which perform many vital biological functions in cells. Similarly, nucleic acids, namely DNA and RNA, carry genetic information and are crucial in the synthesis of proteins. Without nitrogen, these molecules cannot exist and therefore, nitrogen is fundamental to all living organisms.
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What??????
Answer:
I think the answer is hypothesis
Answer:
yes we can add nutrition from healthy and nutritious foods .
hope it is helpful to you
Answer:
1) C. Blood pressure cuff, towels, bitten cookies
2) C. Vector
Explanation:
1) C. Fomities are things that tend to carry infections. Here C is the most plausible answer
2) C. Vector. You often hear this when we talk about diseases that can spread like when mosquitoes spread disease, they act as vector
Fomites are non-living objects that can carry and transmit disease. In your question, the correct answer for fomites would be option C. For the second question, an insect transmitting a disease agent is known as a vector. Option c is the correct answer.
The term fomites refers to inanimate objects that, when contaminated with or exposed to infectious agents (such as bacteria, viruses, fungi), can transfer disease to a new host. Option A. Door handle, soap dispenser, a dog infected with rabies virus is partly correct because while door handles and soap dispensers can be fomites, a dog cannot be as it is a living organism. Similarly, option B. Pencils, a mosquito, unwashed iceberg salad partly fits the definition, but again, a mosquito (a living organism) can't be a fomite, it acts as a vector. Finally, option C. Blood pressure cuff, towels, bitten cookies are all non-living objects and thus can be considered as fomites. This means the answer to your first question isn't D. All choices are correct, but rather it's C. Blood pressure cuff, towels, bitten cookies.
In your second question, an insect that transmits a causative agent from an infected organism to an uninfected one is called a vector. So, the answer is C. Vector.
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In population individuals where 149 have the A1A1 genotype, 18 have the A1A2 genotype, and 154 have the A2A2 genotype, so the allele frequency of A1 is 0.49.
The incidence of a gene variant within a population is represented by the allele frequency. Alleles are different versions of a gene that share the same genetic locus on a chromosome.
To determine the allele frequency of A1
There is the formula:
frequency of A1 = (2 x number of A1A1) + Number of A1A2/ 2 x population
so, A1A1 = 149
A1A2 = 18
Population = 149 + 18 + 154 = 321
The frequency of A1 = (2 x 149) + 18/ 2 x 321
hence the frequency of A1 = 0.49
Therefore, the allele frequency of A1 is 0.49.
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Answer:
A or b
Explanation: