3.33 Biology Unit Test

Which sentence best describes a gene?

a gene is a segment of a DNA strand

Scorpions are born with fully developed bodies that have many special parts, such as the stinger on a scorpion's tail. Which process enables a scorpion zygote to develop into cells that ultimately form different body parts?

cell differentiation

Scorpions are born to live, two at a time, and they immediately crawl onto the mother's back for protection and care. They remain there for two weeks as they grow big enough to take care of themselves. As baby scorpions grow larger, which process occurs in their body cells?a

cells divide by mitosis

Which process takes place in meiosis but not in mitosis?

crossing-over

A farmer plants soybean seeds in a field and the soybean seeds sprout. When the first leaves of the soybean plants emerge, photosynthesis begins. Which chemical substance serves as food for the soybean plants?

glucose

The production of egg and sperm cells follow a certain sequence of events. Which of the following lists those events in the correct order?

meiosis, cell differentiation, mature gametes

Which compound is released by photosynthesis and is used in cellular respiration?

oxygen

A scorpion's cells undergo cellular respiration, just as a human's cells do. During cellular respiration, which process takes place?

oxygen is used and ATP is produced

Which process results in offspring that are genetically unique?

sexual reproduction

How does the number of chromosomes in a female scorpion's egg cells compare with the number of chromosomes in her body cells?

the egg cells have half as many chromosomes as the body cells

How are the chemical equations of photosynthesis and cellular respiration similar or different?

the two equations are opposite of each other

Which statement is true about chromosomes?

they are made up of DNA wrapped around proteins

In a cell that is undergoing mitosis, what first happens to the chromosomes after the nuclear envelope breaks down?

they line up at the equator of the cell

The skins cells of a scorpion organize together to form a hard, protective covering. Which term refers to a group of similar cells working together to preform a certain function?

tissue

A soybean plant uses cellular respiration to generate usable chemical energy, released within the cell as molecules of what substance?

ATP