Northern snakehead fish are non-native to the US, but recently a fisherman caught the northern snakehead fish in a pond in Maryland. It is suspected that live fish were intentionally released to the pond. This fish is considered a delicacy in some cultures. Snakeheads are top predators, with 90% of their diet being other fishes. These snakeheads can breathe out of water and travel short distances (about 100 feet) across land. Females can lay more than 100,000 eggs per year. Juveniles have been identified in nearby rivers, such as the Potomac. Based on the information provided, what classification and description best details the impact of this species in Maryland freshwater ecosystems? A) Snakeheads are keystone species and will increase biodiversity.
B) Snakeheads are invasive species and will decrease biodiversity in local ponds.
C) Snakeheads are primary producers and will improve the water quality of local ponds.
D) Snakeheads are primary consumers and will decrease the producer biomass in local ponds.

Mouse liver cells were homogenized and the homogenate subjected to equilibrium density-gradient centrifugation with sucrose gradients. fractions obtained from these gradients were assayed for marker molecules (i. e., molecules that are limited to specific organelles). the results of these assays are shown in the figure. the marker molecules have the following functions: cytochrome oxidase is an enzyme involved in the process by which atp is formed in the complete aerobic degradation of glucose or fatty acids; ribosomal rna forms part of the protein-synthesizing ribosomes; catalase catalyzes decomposition of hydrogen peroxide; acid phosphatase hydrolysis monophosphoric esters at acid ph; cytidylyltransferase is involved in phospholipid biosynthesis; and amino acid permease aids in transport of amino acids across membranes. a) name the marker molecule and give the number of the fraction that is most enriched for each of the following cell components: lysosomes; peroxisomes; mitochondria; plasma membrane; rough endoplasmic reticulum; smooth endoplasmic reticulum.

Which is the correct formula for photosynthesis

This is the interaction of two organisms where one is and the other is neither nor harmed.