Question

1. through cell division, (mitosis / meiosis) creates new body cells, while (mitosis / meiosis) creates gametes, or sex cells, needed for sexual reproduction.

1. alexa steps on a sharp piece of glass while walking on the beach. from stimulus to reflex, trace the path of communication through the nervous system. number 1–3.

______ muscle cells automatically respond, and alexa pulls her foot away.

______ mechanoreceptors in the skin send the information to the brain.

______ neurons from the brain send the information to the muscle cells.

1. match each term with its description.

______ population a) all the species that live in an ecosystem

______ community b) the living and nonliving things that interact in an area

______ ecosystem c) the interactions of a species in an ecosystem

______ niche d) all of the individuals of one species in an ecosystem

______ habitat e) an organism’s natural environment

1. true or false? explain.

______ a tree is too small to be an ecosystem.

Explanation:

Step1: Identify cell division types

Mitosis makes body cells; meiosis makes gametes.

Step2: Order reflex arc steps

1. Receptors send signal to brain, 2. Brain sends signal to muscles, 3. Muscles respond.

Step3: Match ecology terms

Link each term to its definition.

Step4: Evaluate ecosystem statement

A tree has living/nonliving interacting parts.

Answer:

1. mitosis; meiosis
2. 3; 1; 2
3. population - D; community - A; ecosystem - B; niche - C; habitat - E
4. False. A tree contains living organisms (like insects, fungi, the tree itself) and nonliving components (moisture, nutrients in its bark/wood, air around it) that interact, so it qualifies as a small ecosystem.