What is this object: its composition includes rocks and some metal, its orbital period is 3-6 years

a. an asteroid

b. a comet

c. a planet

d. the sun

A biologist who studies the transmission of genes from one generation to the next is called

Both Gregor Mendel and Alfred Wegener proposed ideas that were not accepted completely by the scientific community during their lifetimes.

Which kingdom do viruses belong to?

Which of the following is true of a cell membranes

1. Which statement best describes Mendel's experiments? sc. 7. L. 16.1 A. He began with hybrid plants. B. He controlled pollination. C. He observed only one generation. D. He used plants that reproduce slowly.

Which layer of soil is least likely to be penetrated by plant roots? a. O (organic matter) b. A (topsoil) c. B (subsoil) d. C (parent rock)

Describe the differences between a chromosome and a DNA molecule.

What role does oxygen play in a plants life?

Which measures the mass of an object? A) a spring scale (in N) B) a height scale (in feet) C) a graduated cylinder (in mL) D) a triple beam balance (in grams)

In his study of pea plants, Gregor Mendel used which method to produce offspring? O cross-pollination, by using parents that had identical traits O cross-pollination, by using parents that had different traits O self-pollination, by using one parent