Correct Answer: D. detoxification

Correct Answer: C. heart

Correct Answer: C. R

Correct Answer: C) Chloroplast

Explanation

Plant cells and animal cells share many similarities in their structure, but there are some differences that set them apart. One of these differences is the presence of chloroplasts in plant cells. Chloroplasts are specialized organelles that are responsible for photosynthesis, the process by which plants make their own food using energy from the sun. Chloroplasts contain chlorophyll, a green pigment that gives plants their characteristic color. Animal cells do not have chloroplasts, which means they cannot carry out photosynthesis. Instead, animal cells rely on consuming other organisms or organic matter to obtain the nutrients they need to survive. Ribosomes, cell membranes, and mitochondria are all structures that are found in both plant and animal cells, so they do not differentiate the two cell types. In summary, the correct answer to this question is Option C: Chloroplasts, as they are unique to plant cells and not found in animal cells.

Correct Answer: A. possess exoskeletons

Correct Answer: A. Competition leads to the selection of individuals with favorable traits for survival and reproduction

Explanation

When individuals within a population compete for limited resources such as food, water, or mates, those individuals with favorable traits that enhance their ability to acquire resources are more likely to survive and reproduce.

Correct Answer: A. I and II only

Correct Answer: D. parasitism

Correct Answer: C) lipids and proteins

Explanation

The question is asking about what makes up the cell membranes. Cell membranes are important structures that surround and protect cells. They are made up of two main components - lipids and proteins. Lipids are a type of fat molecule that make up the majority of the cell membrane. Proteins are also an important component of the cell membrane and help to regulate what goes in and out of the cell. Option A, carbohydrates and lipids, is not correct because while carbohydrates may be present on the surface of the membrane, they are not a major component of the membrane itself. Option B, vitamins and proteins, is not correct because while proteins are an important component of the membrane, vitamins are not. Option C, lipids and proteins, is the correct answer. As mentioned earlier, lipids and proteins are the two main components of the cell membrane. Option D, water and sugar, is not correct because while water is present in the cell membrane, it is not a major component. Sugar is also not a major component of the cell membrane. Option E, starch cellulose, is not correct because while cellulose is a major component of plant cell walls, it is not a major component of the cell membrane. In summary, the cell membrane is made up of lipids and proteins. These two components work together to create a protective barrier around the cell that helps regulate what goes in and out of the cell.

Correct Answer: A) primary producers

Explanation

In this question, we are being asked to identify the component of an ecosystem with the greatest biomass. Biomass refers to the total mass of living organisms within a given area or ecosystem. The options given are primary producers, primary consumers, secondary consumers, and tertiary consumers. Primary producers are organisms that produce their own food through photosynthesis, while primary consumers feed on primary producers. Secondary consumers feed on primary consumers, and tertiary consumers feed on secondary consumers. The correct answer to this question is option A: primary producers. This is because primary producers form the base of the food chain and are therefore more numerous than the other trophic levels (primary, secondary, and tertiary consumers). They are also responsible for producing the energy that sustains all other organisms in the ecosystem. It is important to note that while primary producers have the greatest biomass, they may not have the greatest biodiversity or number of different species. This can vary depending on the specific ecosystem being studied. Understanding the different trophic levels and the flow of energy through an ecosystem is an important concept in biology. It helps us understand how different organisms interact with each other and their environment.