Does anyone know the full answers to these questions as there are very few answers in the book. CGP ADDITIONAL SCIENCE B2 Topic 1 revision summary

Final answer:

Protozoans can move using pseudopodia, cilia, and flagella, but not by budding. The correct answer is  d. budding.

Explanation:

You are absolutely correct, and I appreciate the clarification.

Protozoans employ various methods for movement, including pseudopodia, cilia, and flagella, with budding having no connection to their locomotion.

Pseudopodia are temporary extensions of the cell membrane utilized by organisms like Amoeba for both movement and prey capture.

Ciliates utilize numerous hair-like structures called cilia for propulsion, while flagella are whip-like structures used by certain protozoans like Euglena.

Importantly, budding is a distinct process related to asexual reproduction and not a means of protozoan locomotion.

Therefore, the  correct answer is  d. budding.

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Final Answer:

If an infectious disease can be transmitted directly from one person to another, it is a B) Communicable disease.

Explanation:

Communicable diseases are those that can be transmitted from one person to another, either directly or indirectly. These diseases are caused by infectious agents such as bacteria, viruses, or parasites. When an individual with a communicable disease comes into contact with a susceptible host, there is a potential for transmission.

The term "communicable" refers to the ability of the disease to be communicated or spread from one person to another through various means, including direct contact, respiratory droplets, bodily fluids, or other modes of transmission. Susceptible hosts are individuals who are at risk of contracting the disease when exposed to the infectious agent.

Options C and D, "Port of entry to a host" and "Port of exit from the reservoir," are related to the mechanisms of disease transmission but do not define the type of disease. The correct answer, in this case, is B) Communicable disease, as it directly addresses the nature of the disease that can be transmitted from person to person.

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Answer:

B) Communicable disease

Explanation:

A communicable disease is an illness cause by a pathogen (like bacteria, virus, or parasite) that can be spread from person to person through forms of transmission, such as direct contact, sneezing/coughing, or contaminated objects. Examples of communicable diseases include the common cold and COVID-19.

Answer: c. making hormones that regulate blood sugar levels

Pancreas are organs, plays important role in the digestion of food. The islet of Langerhans is a part of pancreas that has beta cells, which produces insulin. Insulin is a hormone which is released in response to assimilate food. Its primary function is to control, the sugar level in blood.

Answer:

Death of macrophages

Explanation:

• Pus is formed at a site of infection and consists of a protein-rich fluid which is often yellowish white in color.
• This is caused because the immune cells that reach the site of infection, die and build up in the area.
• These immune cells include neutrophils and macropahges.
• When there is an infection, these neutrophils and macrophages reach the site of injury as they are a part of the innate immune system to control the infection and then when they die and if not cleared from the site of the infection, then a build-up of pus occurs.

Answer:

Cell membrane.

Explanation:

The cell is the basic unit of the living organisms. The cell consists of the various cell organelles like nucleus, mitochondria and Golgi. The cell membrane covers the cell boundary.

The outer shell protects the egg and allows the exchange of moisture. The plasma membrane performs the similar functions ad allows the transport of some selected particles only.

Thus, the correct answer is option (A).