Hi,Find attached the completed work.The plagiarism report is also attached in the outline. It is 0%. Feel free to ask for any clarification or editing if need be.Looking forward to working with you in the future.Thank you.

Running head: ZOOLOGY

Zoology
Student’s Name
Professor’s Name
Course Title
Date

ZOOLOGY

2
Animal Life Histories

Pseudoceros (Platyhelminthes) refer flatworms usually found in the marine habitats all
under the phylum Platyhelminthes and under the Pseudocerotidae family. Physically, these
worms can be described as oval in shape with different shades of color like red, pink, purple for
example These types of worms lack the respiratory and skeletal systems and hence lack a body
cavity and can be referred to acoelomates in this regard. Due to their flat shape, their cells are
located near the surface of their bodies which essentially helps then in respiratory processes of
gaseous exchange and excretion of waste substances. They have only one opening, the mouth,
which serves both purposes of ingestion of food as well as excretion of waste products. These
organisms usually use the sense of smell through chemosensory detectors to identify their prey
and detect their food where they use the Pharynx to engulf through holding and entrapment and
also through the use of a mucous secretion and assimilate their prey. Under reproduction, they
reproduce by the means of ‘penis fencing’ whereby they stab each other on any parts of the body
which lead to the transfer of the spermatophore which later spread across the body and are
absorbed. After this process, fertilization takes place and oviposition occurs where a batch of
eggs are laid and the preceding ones being placed on top of each other they further take care of
the eggs by wrapping around them until they hatch. Under adaptation, the larvae of the
organisms develop an apical organ, a tuft of cilia which ensures that it is sensitive enough to the
surrounding. Usually, these larvae produce a trailing mucous secretion which helps them in filter
feeding while in adults, feeding is done through engulfing and folding as well as secretion of
mucus to trap their prey.
Micrura (Nemertea) in their feeding habits are hunters and scavengers and trap and
immobilize their prey by secretion of sticky toxic substances and in other cases coils around the

ZOOLOGY

3

prey and whole ingestion of the prey takes place after eversion of the proboscis. Additionally,
they may use stylet to inject toxins into the prey’s body weakening it and is thereafter swallowed
wholesomely under peristaltic body action and utilization of ciliary currents in the gut or the prey
may also be injected with digestive enzymes and suctorially ingested. In most cases, these
organisms feed on insects and their eggs, bivalves, and crustaceans. These organisms have
different reproduction process, but in the process that involves metamorphosis, gradual
development takes place where they form larvae known as Desor larvae which later undergoes
metamorphosis while still under the egg case. In the event of the reproduction process, the
gonads which are civilized appear as patches on the mesenchymal tissues, where they enlarge
and obtain a hollow shape and certain special cells produce the gametes and fill the cavity. They
later gather in a large number to produce the eggs through temporary pores or ruptures in the
wall of their body where some species have external fertilization on a mucous layer and others
exhibit internal fertilization where the sperm is released and moves into the ovaries of the mating
females. The younger ones usually locomotion is by the use of epithelial Celia while some others
secrete a layer of mucus and afterward use it to slide through while the adults swim and drift in
the water and can often be described as solitary when not in mating seasons.
Culiseta (Arthropoda) are types of mosquitoes found in different areas: temperate
terrestrial and fresh water area. Taking a consideration of Culiseta melanura in this case, in their
feeding habits, the male usually feed on nectar from flowers due to the undeveloped nature of
their mandibles to the capability of piercing the human skin while the females have developed
mandibles and feeds on blood in birds and rarely in mammal where they pierce the epidermis o
suck blood. Under their reproduction strategies, the eggs are usually laid on the water surface in
a crypt and usually require this water for survival and where deficiency will lead to drying out.

ZOOLOGY

4

The temperatures in the environment are a key determiner of the longevity period of hatching
where thereafter the larva is left to develop on its own. Later in...