Which statement is an example of competition? a. egrets eat insects that are unearthed after livestock graze. b. wasps lay eggs inside hornworms so that after hatching the wasp larvae can feed on the hornworm. c. lions and hyenas, which both live in a savanna ecosystem, eat the same prey, antelope. d. otters contribute to a high level of diversity in their ecosystem as they eat urchins, allowing kelp to grow. e. ladybugs consume insects such as aphids, mealyworms, and spider mites

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer