BIOLOGY COLLEGE

In the practice of ________, scabs from smallpox victims were used to immunize susceptible individuals against smallpox.

Answers

Answer 1
Answer:

Answer: Variolation

Explanation:

Variolation can be defined as the condition in which the inocolutaion of the individuals with the infectious materials, scabs or pulses from the smallpox victim.

This was introduced by the route of nasal passage or injected intravenously. The infection that developed because of this was less than normal and it provided protein against more serious disease.

Hence, the correct answer is Variolation.

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Why are the oldest fossils found in the oldest rock layers?
UESTION 15 Functions of the stomach include all of the following, except initiation of protein digestion. mechanical breakdown of food. denaturation of proteins. storage of ingested food. absorption of triglycerides.

Biology questions please help

Answers

1. The molecule above that question is a nucleic acid
2. The molecule above that question is a lipid, or a fatty acid specifically
3. The reaction taking place is a dehydration synthesis

Hippies were young Americans who lived the counterculture lifestyle

Answers

Answer:

true

Explanation:

i took the quiz and got the question correct. please like and rate my answer

1. Phagocytosis is a complex process that can be affected by many different things. State a hypothesis as to something that you believe might affect phagocytosis in Tetrahymena. Be specific as to how you believe it might affect phagocytosis. 2. What are the independent and dependent variables of your hypothesis?
Independent: ____________
Dependent:___________
3. What is a negative control you should use to rule out alternative explanations for a positive result?
4. In Parts 2 and 4, you measured the diameter of the micronucleus using fluorescence microscopy and electron microscopy. How do the measurements compare? Which of the two types of microscopy above do you believe was most accurate? Why?

Answers

Phagocytosis queries are given detailed in the following way

Explanation:

1.Phagocytosis is a process wherein a cell binds to the item it wants to engulf on the cell surface and draws the item inward while engulfing around it.Phagocytosis differs from other methods of endocytosis because it is very specific and depends on the cell being able to bind to the item it wants to engulf by way of cell surface receptors. Phagocytosis won’t happen unless the cell is in physical contact with the particle it wants to engulf.

2.A hypothesis states a presumed relationship between two variables in a way that can be tested with empirical data. ... The cause is called the independent variable; and the effect is called the dependent variable.

Independent and Dependent Variable Examples. In a study to determine whether how long a student sleeps affects test scores, the independent variable is the length of time spent sleeping while the dependent variable is the test score. You want to compare brands of paper towels, to see which holds the most liquid.

3.A negative control is a control group in an experiment that uses a treatment that isn't expected to produce results. A positive control is a control group in an experiment that uses a treatment that is known to produce results.

A negative control is part of a well-designed scientific experiment. The negative control group is a group in which no response is expected. It is the opposite of the positive control, in which a known response is expected.

These two controls, when both are successful, are usually sufficient to eliminate most potential confounding variables: it means that the experiment produces a negative result when a negative result is expected, and a positive result when a positive result is expected.

4.Electron microscopes differ from light microscopes in that they produce an image of a specimen by using a beam of electrons rather than a beam of light. Electrons have much a shorter wavelength than visible light, and this allows electron microscopes to produce higher-resolution images than standard light microscopes.Microscopes are used to produce magnified images. ... light microscopes are used to study living cells and for regular use when relatively low magnification and resolution is enough. electron microscopes provide higher magnifications and higher resolution images but cannot be used to view living cells.

Fluorescence microscopy is used

Snake venom contains a mixture of enzymes, which include phospholipase that break down cell membranes, proteinases that destroy proteins, as well as amino acid oxidases and nucleotidases that break down the monomers for protein and DNA synthesis, which is why they can be so deadly. If you were bitten by a venomous snake you may be treated with an antivenom. In addition to antibodies that help your immune system recognize and fight the foreign molecules, what else does the antivenom most likely contain

Answers

Answer:

The correct answer is - Venom enzyme inhibitors.

Explanation:

The snake venoms are the complex mixtures of phospholipase A2s, disintegrins, serine proteases, C-lectins, and metalloproteases, and others. The snake venom phospholipase A2s (svPLA2s) enzymes found in most of the families of venomous snakes that cause anticoagulant effects, cardiotoxicity, neurotoxicity, and cytotoxicity, and other effects.

In antivenom, there are Venom enzyme inhibitors other than antibodies that help inneutralizing these enzymes by weakening or inhibiting these toxic actions.

Name a metal metalloid

Answers

Answer:

boron, silicon, germanium, arsenic, antimony, and tellurium.

8. In an attempt to breed winter barley that is resistant to barley mild mosaic virus, agricultural researchers cross a susceptible domesticated strain with a resistant wild strain. The F1 plants are all susceptible, but when the F1 plants are crossed with each other, some of the F2 individuals are resistant. Is the resistance allele recessive or dominant? How do you know?

Answers

Answer:

The resistance allele is recessive

Explanation:

According to Darwin's pea experiment, the recessive trait appeared after a few generations.

Here in this case too the resistant individuals appeared after the first generation. This also implies that the offspring of first generation must be carrier of this recessive trait.

Let the susceptible domesticated strain  trait be represented by "S"

and the recessive resistant wild  strain trait be represented by "s"

Then,

F1 generation

SS * ss

Ss, Ss, Ss, Ss ------ All are heterozygous susceptible individuals

F2 generation

Ss * Ss

SS, Ss, Ss, ss

ss shows reappearance of resistant wild  trait.

Hence, the resistance allele is recessive.
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