Which era is characterized by stromatolites as the most abundant fossil

Organisms that use energy from the sun to make their own food are called A) carnivores. B) consumers. C) omnivores. D) producers.

If a cell of an organism contains a nucleus, the organism is a

What are codons and anticodons?

The climate of a city situated high in the mountains of the middle latitudes would, according to Köppen, be classified as

Identify the nerve indicated by the arrow below that arises from the medial and lateral cords of the brachial plexus and provides sensory innervation to the skin of the lateral 2/3rds of the palm of the hand:

What are some facts abt Neptune & Uranus?

Which of these substances could be driven across a membrane by the resting membrane potential?

Norway rats have 42 chromosomes in their diploid cells. If a diploid rat cell enters meiosis, how many chromosomes and double-helical molecules of DNA will be present in each daughter cell at the end of meiosis II?

Which discovery is attributed to Phoebus Levene? A. extraction and observation of DNA B. identification of ribose and deoxyribose C. recognition of RNA as DNA's messenger D. construction of an accurate DNA model

A small population of chimpanzees lives in a habitat that undergoes no changes for a long period. how will genetic drift probably affect this population?