A star's apparent brightness is dependent upon a) temperature. b) distance from Earth. c) size. d) all of the above.

1. Explain in detail malnutrition 2. Why do teenagers require more energy than the adults? 3. What is a balance diet?

A plant grows in soil contaminated with toxins. Through which structure word the toxins first enter the plant? A. Paramecium B. Chloroplasts C. Phloem D. Xylem

A biome is a broad category of ecological organization that includes all of the biotic and abiotic components of an entire climate region, such as a desert or a rainforest.

Why were both rows and columns used in the periodic table?

After birth, many mammals, such as humans, cats, and dogs, tend to suck things that touch the roof of their mouth. This is known as suckling and is

The type of liquid is the

Why is the cell called the basic living unit of all living matter?

True or False All algae have roots, stems, and leaves.

How would a houseplant respond to sunlight that comes from one direction? A. by curling its stem around its leaves B. by closing its leaves at night C. by growing roots downward through the soil D. by bending its stem toward the sun

Hershey and chase used a dna-based virus for their work. How might the results have been different if they had used an rna virus?