Elizabeth was studying the history of the cell theory and the contributions of different scientists. She made this table to compare two of the scientists.

X
Y
observed objects using a microscope observed small organisms using his own version of a microscope
called what he observed "cells” called what he observed "animalcules”
Which pair of scientists should Elizabeth write instead of X and Y?

Schwann and Hooke
Hooke and Schleiden
Hooke and Leeuwenhoek
Virchow and Schwann

Hooke and Leeuwenhoek

Explanation:

Robert Hooke, an English scientist was the first person to see cells under the microscope and give them a name. He made this discovery in 1665 when he observed the bark of oak tree, and saw compartments which he called 'rooms'.

On the other hand, Antonie Van Leeuwenhoek observed living cells which he named 'animalcules'

Thus, X and Y should be Robert Hooke and Antonie Van Leeuwenhoek

Hooke and Leeuwenhoek

Explanation:

Robert Hooke, an English scientist was the first person to see cells under the microscope and give them a name. He made this discovery in 1665 when he observed the bark of oak tree, and saw compartments which he called 'rooms'.

On the other hand, Antonie Van Leeuwenhoek observed living cells which he named 'animalcules'

Thus, X and Y should be Robert Hooke and Antonie Van Leeuwenhoek

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

the overall balanced equation

6co2 + 6h2o > c6h12o6 + 6o2

sunlight energy

where: co2 = carbon dioxide

h2o = water

light energy is required

c6h12o6 = glucose

o2 = oxygen