Answer:
The officer that allows people in and out of the crime scene.
Explanation:
The cell membrane chooses what comes in and out of the cell, therefore the officer would be most similar to the job of the cell membrane.
Answer:
volume of 2% saline (V₁) = 0.25ml
volume of water = 4.75ml
Explanation:
The requirement in the question is to obtain 0.1% of NaCl from 2% NaCl, and the process is dilution. The general dilution equation is guven by:
C₁V₁ = C₂V₂
where:
C₁ = initial concentration = 2%
V₁ = initial volume = ?
C₂ = final concentration = 0.1%
V₂ = final volume = 5ml
C₁V₁ = C₂V₂
calculating for V₁
∴ V₁ = (C₂V₂) ÷ C₁
= (0.1% × 5) ÷ 2%
V₁ = 0.25ml
Now, let us calculate the volume of water needed:
V₁ + Volume of water = V₂ (volume of 0.1% NaCl)
0.25 + volume of water = 5
volume of water = 5 - 0.25
volume of water = 4.75ml
Answer:
The correct answer is "fruit; seed dispersal".
Explanation:
Fruits are plant adaptions that allow them to disperse their seeds by offering food to animals. In this case the plants have adapted to attach their seeds to the fur of animals instead of offering food. Therefore, the burrs are a type of fruit that is not eaten by animals, but the plants achieve its goal that is seed dispersal.
The answer is b- the crocodile heart has three chambers.
Answer: lower reproductive potential
Explanation: Evolutionary psychologists focused on what today is sociobiological approach to sexuality shaping the pattern of human sexuality. This considers that women's parental investment in reproduction is greater than men's, because human sperm is more abundant in quantity than eggs, and the fact that women must carry their young in the womb for several months as well as nurture them for a considerable time after birth. This tends to make women more selective in their choice of mates than men and is seen as a limiting factor in regards to sexuality compared to men.
According to social learning theory however, sexuality is a learned behaviour which arise from studying our environments. The attitudes of parents and grown ups in the society tend to shape our perspectives and expectations which expressing sexuality is a part of.
