When does one species of an organism become two speices

Sunflower plants have smooth and fleshy stems. Based on these characteristics, which type of plant could it be? A.) Herbaceous B.) Woody C.) Monocot

Molecular biology of the cell

Which is a correct interpretation of the cladogram shown below? Amoeba Sponge Earthworm Trout Lizard Koala Dog Placental Hair Limbs Jaws Segmented Body Multicellular Unicellular Common Ancestor O A. Sponges evolved after amoeba. O B.

Which fossils do invertebrate paleontologists study?

A substance that moves across a cell membrane without using the cell's energy tends to move

A 14-month-old toddler is able to recognize the shapes of objects and fit smaller boxes into larger boxes. which type of cognitive development does this action indicate?

In humans, having wet earwax is a dominant trait. Having dry earwax is recessive. A Man has recessive allele and one dominant allele. What is his phenotype?

Chromosomes condense at the start of mitosis so that they can be more easily between the two nuclei

A brown dog is crossed with two different black dogs. The first cross produced only black dogs and the second cross produces equal numbers of black and brown dogs. What is the genotype of the brown dog? the first black dog? the second black dog?

The replacement stage of B by stage C and the replacement of stage C by stage D in a particular location is known as A exploitation B covercropping C ecological succession D punctuated equilibrium