If the atomic number of an element is 80 and the atomic mass is 200.59, how many protons are there in the nucleus?

In what way does the presence of an atmosphere enhance conditions for life on Earth's surface? This is a Science

How would the human population be different if crossing over did not happer during meiosis?

In order to reproduce a virus must be

An ecosystem can be characterized as

Become the most important source of environmental change on earth? select one: a. climateb. energyc. human activityd. conservation biology

How does the Sun contribute to physical weathering? A. When water is heated, it expands, which causes rocks to break. B. Minerals in rocks heat and expand at different rates, which causes rocks to break. C.

A phylogenetic tree shows that birds and crocodiles share many features. A hypothesis based on this tree predicts that these features are present in a common ancestor. Which of these predicted traits is supported by fossil evidence?

Imagine that you are talking with one of your friends about your biology course. He states that the somatic nervous system is subdivided into sympathetic and parasympathetic components, and is responsible for involuntary responses.

In both American cotton (Gossypium hirsutum) and Egyptian cotton (G. barbadense) petal spot is a dominant character over no petal spot.

How is it possible for percolating groundwater to remove mineral material as well as deposit it?