All ova contain sex chromosomes corresponding to:

X

Y

XX

XY

Which of the following correctly compares the structures of plant and animal cells? Both plant and animal cells have endoplasmic reticulum, where cellular respiration takes place.

As a college student, you are trying to be healthy and Calorie conscious by making yourself a lettuce and tomato sandwich for supper. After making the sandwich, you decide it needs something extra.

Kathleen, age 7, holds the small ball in both hands in front of her before swinging forward, then backward, with one hand and balancing on well-separated feet. as her arm swings forward and across her body, she rotates and leans into the throw.

Two atoms that differ only in the number of neutrons they contain are known as

Ocean waves are driven by drag between and the surface of the ocean.

When energy from the sun hits the air above land, the air warms and rises. Along a coastline, cooler air above the ocean flows toward the land to replace this rising air. Which of the following best describes these processes. F.

Consider a population of bacteria that came from a single ancestor. because bacteria reproduce asexually, there should be no variation in this population, but that violates the first postulate of natural selection.

Through what process do cells become specialized so they can perform specific functions within organisms?

How does a gradient of a river affect its flow

What is the main function of cuticle in plants? 1. It prevents water loss. 2. It absorbs sunlight. 3. It protects the plant from predators.