Label each example as either (PI) passive or (AI) active immunity:a. ____ Bill had chicken pox when he was five. He doesn’t catch it again, even when his nephew gets sick with the virus.
b. _ Billy Jr gets vaccinated with a live attenuated form of the chicken pox virus. He doesn’t get chicken pox after playing with his infected cousin.
c. _____ Bill’s 3 month old daughter is breast feeding. She does not get chicken pox after playing with her infected cousin.

Answers

Answer 1

Answer: First, let's distinguish active from passive immunity:
- Active immunity occurs in a direct exposure of individuals to live pathogens. The result is a development of a disease. After that, individuals acquire immunity to the disease.
- Passive immunity is induced by vaccines with antibodies for a disease, so the disease does not develop.

a. ACTIVE IMMUNITY - Bill had a disease, so it must be active immunity.
b. PASSIVE IMMUNITY - Bill got a vaccine and a disease did not develop, so it must be passive immunity.
c. PASSIVE IMMUNITY - Although, 3-month-old daughter did not get a vaccine, she has mother's antibodies from the milk so she will not develop a disease.

Answer 2

Answer:

Answer:

Active

Passive

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Which human activity has aggravated the ecological issue of global warming?rapid industrialization

measurement of carbon footprints

population migration

Answers

rapid industrialization im positivee

Answer:

rapid industrialization

Explanation:

I had this question asked on a test and got a 5/5

Which statement illustrates how human activities can most directly change the dynamic equilibrium of an ecosystem?Water pollution causes a decrease in fish populations in a river.
A hurricane causes a stream to overflow its banks.
Increased wind increases water evaporation from a plant.

Answers

The best answer would be the first statement. The first sentence which is 'water pollution causes a decrease in fish populations in a river.' illustrates how human activities can most directly change the dynamic equilibrium of an ecosystem.

Answer: Water pollution causes a decrease in fish populations in a river.

Explanation:

An ecosystem is a biotic community which includes abiotic (non-living) and biotic (living) components. The abiotic components includes water, sunlight, wind, soil and temperature whereas the biotic components includes the living beings such as plants, animals, microbes and other. The dynamic equilibrium of the ecosystem can be defined as the condition in which the abiotic factors of the ecosystem supports the life of the biotic factors without undergoing any drastic change which could negatively affect the population of living beings.

The river water is an abiotic factor which can be a habitat of large diversity of marine flora and fauna. The pollution of water could negative affect the population of the fish residing in the river. This will disturb the balance of ecosystem. As, in the ecosystem various species interact with one another to survive. Hence, the dynamic equilibrium will be changed.

Difference between autosomes and gametes

Answers

Answer:

An autosome corresponds to a somatic chromosome, which defines structural and functional characteristics in an individual, while the gamete is a cell containing autosomes, useful in sexual reproduction.

Explanation:

The somatic chromosomes are called autosomes, since they contain the genetic information necessary to define the structure and functions of a living being. In humans, there are 23 pairs of chromosomes, of which 22 pairs correspond to autosomes.

The gametes, or sex cells, are in charge of transmitting the genetic information from parents to offspring, and are formed by chromosomes. As gametes are haploid cells, they possess half of the chromosome load, that is, in the human being there are 22 autosomes.

Generally speaking, an autosome is a somatic chromosome, while a gamete is a cell containing autosomes.

A single atom of gold can be

Answers

neither a molecule or a compound xD

a molecule is usually reserved to represent the smallest particle of a compound.

Bacteria can thrive in many environments including hostile environments like hot springs, polar ice caps and salt flats. This is due to the ________ of bacteria.A. biochemical diversity
B. small sizes
C. varied shapes
D. methods of movement

Answers

Answer: The correct answer for the blank is A.biochemical diversity.

Bacteria can thrive in various environmental conditions such as hot springs, salt flat, polar ice caps because of their biochemical diversity.

For instance, the organisms belonging to the domain archaea ( such as methanogens) live in extremely harsh environmental conditions. They have ether linked lipids in their cell membrane ( unlike bacteria, which possess ester linked lipids) and do not have peptidoglycan in their cell membrane. This provides them an advantage to survive under harsh conditions.

i think its A because the small size , shape and the methods of movement have nothing to do with the environments it can survive in

Which of the following occurs during anaphase I of meiosis?(A) Formation of tetrads
(B) Separation of homologous chromosomes
(C) Crossing over
(D) Separation of sister chromatids, with one chromatid pulled toward each pole
(E) Assembly of chromosomes along the equatorial plane

Answers

Separation of sister chromatids (D)

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