Biology Quiz Part 2

Rising levels of release hormone may inhibit. It’s further release from the sales that secreted it. This is an example of a hormone having.

• Exocrine function in a negative feedback system

• Autocrine function in a positive feedback system

• Paracrine function in a negative feedback system

• Autocrine function in a negative feedback system

If you were to discover a mutation that caused a female to produce eggs lacking bindin receptors on its vitelline envelope, what would you expect to see if you exposed these eggs to normal sperm

• Polyspermy

• the sperm taking longer to reach the underlying jelly coat

• inability of the normal sperm to fertilize the egg

• faster formation of the fertilization cone

Budding and regeneration share which of the following characteristics

• Both use meiosis to replace lost tissue

• both serve as a trigger for sexual phase of reproduction

• Both can lead to the production of a new individual through meiotic growth

• Both can lead to the production of a new individual through mitotic growth

In the early 1900s, oyster fishermen cut sea stars (starfish), which are predators of oysters, into pieces and threw them back into the sea. This practice led to an explosion in the sea star population because

• other sea stars ate the pieces and were able to increase their reproductive output

• each arm with a portion of the central disc regenerated into a new individual

• competition was removed from the stronger sea stars that were not caught, allowing them to increase their reproductive output

• each arm could form a new individual through budding

Suppose three female sharks are housed without males in a large tank for many years. One morning the caretakers find a single pup swimming with one of the females. They test the pup's DNA and find that it is the same as that of the adult female. The pup likely resulted from

• Budding

• Exual reproduction

• Sexual reproduction with delayed fertilization

• Parthenogenesis

During oogenesis, the first haploid cell with abundant cytoplasm that is produced is the

• First polar body

• second polar body

• Secondary oocyte

• primary oocyte

Which of the following statements about blocks to polyspermy is FALSE?

• The fast block causes release of the acrosomal enzymes

• The fast block results from a change in the electrical-charge difference across the plasma membrane of the egg

• The slow block creates a physical barrier that sperm cannot penetrate

• Blocks to polyspermy prevent more than one sperm from entering an egg

A simultaneous hermaphrodite

• has primary sex organs of both sexes at the same time

• functions as a male at one time in its life and as a female at another

• has gonads that alternate between being ovaries and testes

• Develops from unfertilized eggs

In humans, a primary oocyte is ______ and arrested in _____ of meiosis

• Diploid; prophase 2

• diploid; prophase 1

• haploid; prophase 1

• haploid; prophase 2

Which of the following about fertilization is FALSE?

• The acrosomal process is covered in bidin

• bidin attaches to receptors on the egg’s vitelline envelope

• enzymes from the egg’s cortical granules trigger the fast block to polyspermy

• None of the above