Which causes a drop in female hormone levels?

the onset of the menstrual flow

if an egg is released from the ovary

if the uterine wall thickens

if the egg is not fertilized

Viruses are essentially a strand of genetic material within a protective protein coating known as a

Why does the heart separate the oxygenated and deoxygenated blood?

Which beat describes how ocean currents are created

Which type of data is qualitative data?

Which legs for a frog are used for jumping?

In humans, an X-linked disorder called coloboma iridia (a fissure or cleft in the iris of the eye) is a recessive trait. A couple with normal eyes has a daughter with coloboma iridia.

When a whale carcass sinks to the ocean floor it creates an environment appropriate for succession to happen. How would you explain this phenomenon?

Which of the following is a true statement about sexual vs. asexual reproduction? a. in sexual reproduction, individuals transmit 50%of their genes to each of their offspring. b.

A pollutant that forms when another pollutant interacts with the atmosphere or sunlight is known as a? A. primary pollutant B. secondary pollutant C. tertiary pollutant D. chuck-norrisy pollutant

What animal is best adapted to the life in a savanna biome? A. Bison B. Caribou C. Llama D. Zebra