Adult black widow spiders have a shiny, black, rounded, circular abdomen and
are about 1/3 inch long (about 1-1/2 inches when their legs are spread).
Adult spiders have two reddish or yellowish triangles on their bottom which
looks like an hourglass marking, and their body color is dark colored usually
black or sometimes dark brown. They are usually recognized because of their
red or red-orange hourglass design on the bottom of their abdomen. This
pattern is changeable and may look like two separated spots. In some spiders
there is no pattern on the abdomen. The immature stages of both sexes of the
widow spiders have red or red-orange or yellow spots and strips on the top
of their abdomen. Females are colored gray or pale brown. Their color gets
darker as they get older. The hourglass pattern on the underside of the
abdomen forms throughout their development. Male widow spiders are smaller
about 1/4 inch long, and they're usually not black in overall color, instead
it looks like a light brown or gray. Male widows have an hourglass pattern
too. When they are full-grown they have large knob-like shapes called
pedipalps, which start from the head. But to females they still look the
same. Newly hatched spiderlings are white or a yellowish-white, eventually
turning blackish when they get older. Adolescents of both sexes look like
the male.
Black Widow spiders build loose and uneven mesh-type webs of rough silk in
dark places usually outdoors. And build their webs near the ground
(sometimes inside of houses) but mainly they build them outside. Black
Widows can be found near the ground in dark undisturbed areas. Nest sites
are near holes made by small animals, or around construction openings and
woodpiles. Also they can be found around low shrubs which are usual sites
for widow spiders. Black widows are also found inside in dark undisturbed
areas like behind furniture or under desks and in undisturbed basement areas
and crawl spaces of homes are areas where black widow nests are. They don't
produce a web like the weaving spiders do or the funnel pattern webs that the
funnel weaver spider's make.
The female lays eggs in silken cocoon sacs about 1/2-inch in width. The sack
is a pear shaped, and is a creamy yellow, light gray, or light brown in
color. They usually lay about 300 to 400 eggs per sac and have 4 to 9 egg
There is no doubt that arthropods are an extremely successful group of animals, with an estimated 5-10 million species worldwide[1], and this can be attributed to having an exoskeleton; it provides many benefits, such as protection from parasitism and other threats. However, one major disadvantage of having an exoskeleton is the limitations that an inelastic cuticle can place on growth. The exoskeleton provides protection, but when freshly moulted the animal is soft and vulnerable, as well as having limited mobility and use of appendages; many seek shelter before moulting[2]. There are similarities and differences between the moult cycles of all the arthropods, however only crustaceans and insects will be discussed here.
When the eggs are dropped into the water, the eggs will stay whole. If we were dropping from a higher distance they would break.
They found that their groupings of similar shaped pelvic girdles fell into the correct category, except at the family level.
it) and gaster (abdomen less the abdominal segments in the petiole). The petiole may be
grey color. Its head is flat and V-shaped. A ridge runs from the blowhole to the upper-lip. The
The monarch butterfly, as known as Danaus plexippus, is often called the milkweed butterfly because its larvae eat the milkweed plant. They are also sometimes called "royalty butterflies" because their family name comes from the daughter of Danaus, ruler of Argos. There are many other interesting facts about this butterfly including its anatomy and life cycle, where the butterfly lies on the food chain, the migration from Canada to Mexico, why the butterfly is being threatened, and lastly, what is being done to help the butterfly.
...ecial cells, the queen puts the eggs from which a new queen will emerge. After the larvae develop from the eggs, the cells are covered with wax.
...side begins to grow and develop at six weeks the baby is only five eights of an inch in measurement. As the months go on the baby goes thru many changes as well as the mother and her body. The mother may tend to get ill at times or may be fine during her pregnancy. There are also reports that the father may become ill at times as well along with the mother, this is common in men.
One of the largest issues in animal sexual reproduction is the conflict of interests between the female and the male of the species. For example, multiple mating has been shown to greatly increase the fertilization rate for the male, but recent studies have shown that multiple mating also benefits the female.
When the colony becomes well established, the queen begins to lay some eggs that develop into queens and males. It takes a few years before a colony becomes large enough to send out winged males and young queens to start new colonies. The cycle will now begin all over again. Nests come in all shapes and sizes. One tropical species built a nest that extended forty feet below the surface of the ground.
The reproductive system was mainly located towards the anal area and inferior to the stomach. The penis was located in the middle. It was white in color and looked like a mealworm. The seminal vesicles were located on both sides of the penis. They were grayish pink in color and looked like walnuts.
The female reproductive systems is made of 9 parts. The sex cell for the female reproductive system is called the egg or ovum. The egg spends it’s dormant life in the ovaries until it is released. The egg has 23 chromosomes within it. The ovaries have two goals: to create and house eggs and the release the female sex hormones, estrogen and progesterone. The fallopian tubes are what the egg travels through to reach the uterus. Fallopian tubes contain tiny hair-like structures called cilia; the cilia allows for mobility of the egg. The fallopian tube is roughly the size of 2 hairs, and is the site of where ectopic pregnancies happen. The process of the egg getting released from the ovaries through the fallopian tubes is called ovulation. Ovulation happens on the 14th day of the menstruation cycle The uterus is where the egg goes to after it travels through the fallopian tubes. The developing baby is held and nourished in the uterus. When the uterus is empty, it’s roughly the size of a fist but expands one an embryo starts to develop. The endometrium is the lining of the uterine wall. It’s used to protect the fetus. When the egg isn’t fertilized, menstruation ha...
Iron Spider will be able to do anything. He will be an indestructible superhero that