Science Grade 8 Unit 1 Pre test Pt 1

What is the mass being shown on the triple beam balance?

• (a) 200.0 grams

• (b) 260.5 grams

• (c) 260.0 grams

• (d) 265.0 grams

What is the length of the nail shown by Ruler A?

• (a) 4 cm

• (b) 4.5 cm

• (c) 4.4 cm

• (d) 4.2 cm

Convert

the following length measurement. 157mm

= ______m

• 1.57m

• (b)15.7m

• (c) 1570m

• (d) 0.157m

What is the maximum mass, in grams, that could be measured by this balance?

• (a) 110

• (b) 500

• (c) 610

• (d) 1510

Asexually produced offspring are genetically

• (a) identical to the parent

• (b) different from each other

• (c) different from the parent

• (d)

  formed by two parents

  
  

A new yeast cell is sometimes produced from a single parent by a process called budding. The process of budding is best described as

• (a) sexual reproduction, with genetically identical offspring

• (b) sexual reproduction, with genetically different offspring

• (c) asexual reproduction, with genetically identical offspring

• (d)

  asexual reproduction, with genetically different offspring

The vast variety of different traits found in humans results from

• (a) intensive training and education

• (b) exercise and conditioning

• (c) sexual reproduction and mutations

• (d) birth defects and recessive genes

The diagram shows the offspring of a white and a gray mouse. All of the offspring are gray.

Which is a correct gene combination for the parents shown in the diagram?

• (a) GG x GG

• (b) gg x GG

• (c) gg x gg

• (d)

  Gg x Gg

The diagram shows the offspring of a white and a gray mouse. All of the offspring are gray.

If two gray (Gg) mice mated, what percent of their offspring would have pure white fur?

• (a) 25%

• (b) 75%

• (c) 50%

• (d) 100%

The parent whose genes are aa

• (a) must be dominant

• (b) has a straight hairline

• (c) has a peaked hairline

• (d) may have AA offspring