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WorksheetsMCAS Biology 7
Total questions: 9
Worksheet time: 15mins
An unfertilized egg cell has six chromosomes. After fertilization, how many chromosomes should the zygote have?
3
6
12
24
This organelle takes food and turns it into ENERGY (ATP) for plant and animal cells.
Chloroplast
Mitochondria
Lysosome
Ribosome
Besides nitrogen, the DNA base guanine is made of which of the following common elements?
Hydrogen, Sulfur and Zinc
Oxygen, Phosphorus, and Iron
Carbon, Hydrogen, and Oxygen
Sodium, Potassium, and Carbon
Scientists hypothesize that tiger frogs evolved from a recent common ancestor. Which of the following provides the best support for the scientists' hypothesis?
Tiger frogs have longer life spans
Tiger frogs have the same diet
Tiger frogs live near each other
Tiger frogs have similarities in their mitochondrial DNA that are not shared by other frog species.
Which of the following is the best example of homeostasis in the human body?
The secretions from oil glands in the skin decreases as a person ages
Opposite muscles are used to bend and extend a person's arm at the elbox joint
The villi of the small intestine increase the absorption of nutrients from the small intestine into the blood.
More growth hormone is released when the level of growth hormone in the body is too low.
The cladogram below shows how closely related these animal populations are. What populations have more recent common ancestor?
1 and 2
3 and 4
1 and 4
4 and 2
The cladogram below shows how closely related these animal populations are. Besides comparing anatomy, what evidence do scientists use to figure out relatedness?
compare DNA sequences
compare lipids
hair color
find out what they eat
