<span>These lobes are cut longitudinally. Ideally each section of a single
lobe contains practically all of the maturational steps in sperm development.
These sections are missing the initial stage, spermatogonia. These testis
consists of many lobes, the pointed ends open into the vas deferens, or sperm
ducts. Each lobe contains many cysts, separated from each other by connective
tissue partitions or septa. These cysts are composed of cells in the same stage
of development. At the blunt or apical end of the lobe there are many small
primordial germ cells, each known as a spermatogonium, and all undergoing
mitosis. This mitotic activity produces the cysts. From the blunt to the
pointed end the cysts show progressive stages of maturation. Differentiating
and mature spermatozoa can be seen where the lobe is to join the vas deferens.
These testis are from the lubber grasshopper, Rhomaleum</span>
Answer:
The balance of nature is a theory that proposes that ecological systems are usually in a stable equilibrium or homeostasis, which is to say that a small change will be corrected by some negative feedback that will bring the parameter back to its original "point of balance" with the rest of the system
Explanation:
You can tell tara that exposed newborns tend to <span>have lower Apgar scores.
Analgesia will reduce pain in the labor, but the pain is causing the release of many hormones that will assist in labor. The absence of those hormones can make the baby have lower Apgar scores after labor.</span>
Answer:
Explanation:
5 Reasons the World is Running Out of Freshwater
Increased Food Requirements of a Growing Population. ...
Increased Energy Requirements by a Growing Population. ...
Increased Frequency of Droughts. ...
Groundwater is Being Pumped at Unsustainable Rates. ...
Inadequate Water Infrastructure.