Two students suggested that the wallflower cannot produce fruit unless pollination has taken place. Their
teacher showed them how to prevent bees reaching
the flowers by covering the flowers in a fine mesh bag,
and how to transfer pollen with a fine paintbrush.
a Describe how the students could carry out an
experiment to test their hypothesis
b Suggest how they could modify their experiment to
test whether self- or cross-pollination produced
more seeds in the wallflower
In your answer be sure to describe any controls which
they could include, and any steps they could take to
ensure that their results were valid

The answer is option e. it protects the heart and lungs.

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.

Where is the data? ? and graph