What is an explanation of why producers are always found at the lowest trophic level?

Two genes determining a trait In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue pigment synthesis is inhibited by a dominant allele of gene D.

We are capable of making vitamin d within our bodies and do not necessarily have to consume it in our diet.

How can a scientist know if what he/she is looking at, under the microscope, is in fact a cell? What can mislead us to think we are looking at a cell but in fact we are looking at non-living structures of about the same size?

What kind of molecule carries the alleles from parent to offspring DNA tRNA protein mRNA

3. A distinctive characteristic of mammals that is not observed in other vertebrates is a. internal fertilization b. body hair C. the presence of a cloaca d. endothermy e. a vertebral column

What information can be inferred about genes that are located on different chromosomes? what information can be inferred about genes that are located on different chromosomes? these genes are always inherited together.

Bianca is very self-conscious about her weight. she indulges in strict dieting and often skips her meals. as a result, she was recently diagnosed with osteoporosis, an abnormal condition related to the thinning of bones.

All processes of moving materials across the plasma membrane are classified as either A) diffusion or osmosis B) passive or active transport C) phagocytosis or pinocytosis D) endocytosis or exocytosis

What three factors does a species diversity index take into account? a. Species richness, species diversity, and species productivity b. Species richness, species abundance, and species evenness c.

Wins or losses are the ultimate measure is competitive sports. True or false?