Correct Answer: D) Association between two similar species

Explanation

Symbiosis is a close association between two different organisms that live together. The question is asking which statement is not true of symbiosis. Option A states that symbionts must be living, and this is true because symbiosis involves living organisms. Option B states that symbiosis is an association of 'give and take', and this is also true because both organisms in a symbiotic relationship benefit from each other. Option C states that the association may involve two plants, and this is also true because symbiotic relationships can occur between any two organisms, including plants. Option D, which is the correct answer, states that the association is between two similar species. This statement is not true because symbiotic relationships can occur between different species, not just similar ones. It is important to note that symbiosis can be beneficial, harmful, or neutral to both organisms involved. Examples of symbiotic relationships include mutualism, commensalism, and parasitism. Mutualism is a type of symbiotic relationship where both organisms benefit from each other, commensalism is where one organism benefits while the other is neither helped nor harmed, and parasitism is where one organism benefits at the expense of the other. In summary, the correct answer to this question is option D, which states that symbiosis occurs only between two similar species, which is not true. Symbiotic relationships can occur between different species and can be beneficial, harmful or neutral to both organisms involved.

Correct Answer: C. hexokinase

Correct Answer: A. Excretion

Correct Answer: C. they are large and nucleated

Correct Answer: A. umbilical cord

Correct Answer: A. variation

Correct Answer: B. 0.25

Explanation

The easiest way to solve this problem is to draw a punnet square. The genotypes of the parents are AO and AB. The potential genotypes of their children are AA, AO, BA, and BO. Only genotype BO will produce type B blood. BO is one out of four results of this punnet square, so the probability of this outcome is 1/4=0.25.

Correct Answer: C) Adenosine tri phosphate (ATP)

Explanation

In cellular respiration, energy is produced by breaking down glucose molecules in the presence of oxygen. This energy is needed by cells for various processes such as movement, growth, and repair. The question asks about the form in which this energy is stored.The options provided are: adenosine di phosphate (ADP), Adenosine mono phosphate (AMP), Adenosine tri phosphate (ATP), heat energy, and electrical energy. Of these options, the correct answer is Adenosine tri phosphate (ATP).ATP is a molecule that stores and transports energy within cells. It is composed of one adenosine molecule and three phosphate groups. When a phosphate group is removed from ATP, energy is released and the molecule becomes ADP. This process is used by cells to provide energy for various processes such as muscle contraction, protein synthesis, and nerve impulse transmission.It is important to note that ATP is not the only molecule involved in energy storage and transfer within cells, but it is the main molecule used for this purpose. Other molecules such as NADH and FADH2 also play important roles in cellular respiration.In summary, the correct answer to the question is Adenosine tri phosphate (ATP), which is the main molecule used for energy storage and transfer within cells.

Correct Answer: A. increases the surface area for absorption

Correct Answer: B. anemometer