Several tomato plants are grown indoors next to a sunny window. the plants receive water and fertilizer and remain on the windowsill. over time the plant's stem bends toward the window. which characteristic of life is this an example of? a cellular organization b metabolism c homeostasis d response to environment

 option D. Response to environment.

Justification:

Organisms respond to their environment in a variety of ways.

The environment interacts with the organisms via stimulus and the response to such stimulus is named tropism.

The example of the question, the plant's stem bends toward the window, is called positive phototropism, which means that the plant growth response to light such that the stems bend toward light to permit the leaves to receive more light.

The plant's stems posses positive phototropism and negative gravitropism.

Gravitropism is the response of the plant growth to gravity.

Stems grow away from gravity meaning that this is negative gravitropism, but roots grow toward gravity which is positive gravitropism.

linda: 3 ; laura: 15

step-by-step explanation:

note that linda + laura's age is 18, and that linda is 12 years younger than her sister.

let "linda" = x , "laura" = y:

x + y = 18

x = y - 12

first, plug in y - 12 for x in the first equation:

(y - 12) + y = 18

simplify.

2y - 12 = 18

isolate the variable (y). note the equal sign, what you do to one side, you do to the other. do the opposite of pemdas. first add, then divide.

2y - 12 (+12) = 18 (+12)

2y = 18 + 12

2y = 30

(2y)/2 = (30)/2

y = 30/2

y = 15

next, plug in 15 for y in the second equation (the other equation would work too).

x = y - 12

x = (15) - 12

x = 3

linda's age is 3, laura's age is 15.

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