About 3 million years ago, the Isthmus of Panama (a narrow strip of land connecting North and South America) formed, dividing marine organisms into Pacific and Caribbean populations. Researchers have examined species of snapping shrimp on both sides of the isthmus. Based on morphology, there appear to be seven pairs of species, with one species of each pair in the Pacific and the other in the Caribbean. Researchers reconstructed a phylogeny using mitochondrial DNA sequences and found that each of the species-pairs, separated by the isthmus, were indeed each other's closest relatives. The researchers also found that species from many pairs were not very interested in courting with each other under lab conditions, and any that did mate almost never produced fertile offspring. The species pairs on opposite sides of the isthmus are true species under which species concept(s)?

complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.

a. population growth is decreasing

-2

+4

-10

-3

-8

-3

so the population decreased by 24 because 3+3+8+10+2=26-2=24.

hoped i !

explanation:

yes, because even though a theory has a  lot of evidence to support it, it is not always true