2. The learners then wanted to investigate whether exercise has an effect on heart rate. 2.1. Formulate a hypothesis for their investigation.

Consider the skeleton. which skeletal system is represented by the shaded portion of the skeleton? spongy skeleton compact skeleton axial skeleton appendicular skeleton

Many plants can reproduce asexually. which of these is an example of asexual reproduction in a plant? a. pine cones forming on a tree b. cross-pollination in a tomato c. roots sprouting from a potato d. night-blooming jasmine flowers

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion