How do scientists know that the first organisms were simple, unicellular organisms

if a somatic cell in a carrot has 18 chromosomes. how many chromosomes would normally be present in a gamete

Define the word equilibrium.

The appearance of living systems on Earth from non-living molecules is called Answer adaptation. natural selection. biological evolution. chemical evolution.

Which of the following is NOT necessary for an object to be considered "life"? A. Breathing B. Growth C. Homeostasis D. Reproduction

Describe how the specific gravity of the urine changed after drinking water, and explain the physiological mechanisms responsible for this change.

Compare and contrast punctuated equilibrium and gradualism as models for the rate of evolution

What would happen if meiosis did not occur

Question 1 Bernoulli's principle states that fluid velocity decreases when flow is restricted. 1) True 2) False

How many cells are produced in Mitosis

Which of the following shows the correct unit of weight listed from largest to smallest? A. Gram, microgram, milligram, kilogram B. Microgram, milligram, gram, kilogram C. Kilogram, gram, milligram, microgram D. Milligram, microgram, kilogram, gram