In people who stand for long periods, blood tends to pool in the lower limbs and this may result in varicose veins. what causes the varicose veins?

Which environmental factor could lead to a decrease in genetic variation in a population of tuna? an increase in food availability an increase in pollution a decrease in tuna fishing a decrease in tuna predators

Which statement most accurately describes the interactions among ER, ribosomes, and Golgi bodies in exporting protein from the cell? A. Ribosomes make proteins that travel through the Golgi bodies to the ER, which exports them. B.

A disease caused the population of small planktivorous fish in the region to sharply decline. How will this situation affect the competition for food in the region? Consider direct and indirect effects.

Objects viewed through a single concave lens

A wolf's diploid number of chromosomes is 78. How would the number of chromosomes in the wolf's body cells compare to the number of chromosomes in its gametes? Its body cells and gametes would both have 39 chromosomes.

Which would BEST allow a species to survive environment changes

You discover a very slow-growing plant that has extremely tiny leaves that are covered in a thick layer of wax and succulent stems. in which biome did you most likely discover this plant?

Any change in the normal nucleotide sequence that codes for an amino acid is called a

What are the 3 functions of the membrane proteins?

Which could be classified as part of an ecosystem but not part of a community trees, grasses, bacteria, minerals