Why is coal brittle and diamonds hard when both are forms of elemental carbon

Select the correct statement contrasting gametophytes and sporophytes. A) Sporophytes are vascular, whereas gametophytes are nonvascular. B) Sporophytes are diploid, whereas gametophytes are haploid. C) Sporophytes are larger than gametophytes.

How is a loss of biodiversity most likely to affect an ecosystem?

What kinds of daily activity can contribute pollution to Surface water runoff or to the ground water sources desene infiltration and recharge? Describe two activities and tell how these would contribute pollution to water resources so

The fertilized egg is totipotent, which means: it forms the membranes that surround and support the developing embryo. it can give rise to a complete organism. it can be removed and donated to a surrogate womb.

Harvesting a forest intermittently for lumber, as well as periodically clearing out underbrush and dead trees, is known as

What is a synonym for contention? A. Assertion B. Question C. Guess D. Thought

Which of the molecular below is the main source of energy that a cell uses to carry out its daily actions? A.) NADH B.) NAD+ C.) ATP D.) Glucose

It was a hot summer day. Mattie poured herself a glass of lemonade. The lemonade was warm, so Mattie put some ice in the glass. After 10 minutes, Mattie noticed that the ice was melting and the lemonade was cold.

Match the following items. 1. Rr ... homozygous definition 2. rr ... homozygous, recessive cell 3. identical alleles ... homozygous, dominant cell 4. unlike alleles ... heterozygous, dominant cell 5. RR ... heterozygous definition

Short hair is dominant to long hair in cats. What would be the genotype of a cat with long hair