The pictures show two different ferns that lived millions of years apart. The early fern is extinct, but is drawn based on fossil evidence. Scientific data reveals that the early
fern is an ancestor of the modern fern.
Early Fern
Modern Fern
Which statement best explains why the fern changed over time?
O Humans cut ferns to be decorations, causing each generation to be smaller in size.
O As the Sun aged, its energy output decreased and limited the size ferns could grow.
O As flowering plants emerged, less energy was left for ferns and the growth of ferns was stunted.
The changing environment caused unfit plants to die and better adapted plants were smaller in size.

Does mitochondria still meet the definition of a eukaryote why or why not?

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.