The phrase "a weakly developed" is correct and usable in written English.
It can be used to describe something that is not fully formed or lacks strength in its development, such as an idea, argument, or character.
Example: "The plot of the story suffers from a weakly developed antagonist, making it difficult for readers to feel any tension."
Alternatives: "poorly developed" or "underdeveloped".
Conversely, the root systems of indigenous tree species generally consist of a well-developed but surficial lateral root network, confined largely to the top 50 60 cm of soil and, a weakly developed vertical root system (Phillips and Watson 1994).
This is due to specific properties: Since soil-inhabiting ectohydric moss species do not have real roots and a weakly developed cuticle, grow slow and show minimal morphological changes during lifetime, element concentrations measured in moss integrates fairly well dry, occult and wet atmospheric deposition.
The occlusal pattern is essentially pentalophodont, with four major cusps (metaconid, entoconid, protoconid, hypoconid) and a weakly developed hypoconulid.
Individuals in this sample exhibit, in addition to small body size, reduction of the absolute size of the face, distinct supraorbital tori (in some individuals), a weakly developed mental eminence, relatively large dental dimensions, and dental dysplasias and agenesis.
In the 2.0 2.8 Myr-old South African species Australopithecus africanus, tarsometatarsal immobility laterally [9], and a weakly developed navicular tuberosity medially [7] both suggest the presence of a stiff, arched foot, as does a slight plantar inclination to the cuboid facet on the StW 352 calcaneus (pers. obs).
Palomero Toluqueño is a landrace of the Central and Northern Highlands Group characterized by short plants with frequent tassel branches, small conically shaped ears, a weakly developed root system, and pubescent leaf sheaths often pigmented by anthocyanins.
The foreflippers are relatively short and squarish; in some ways they resemble otariid foreflippers, with longer first digits and shorter subsequent digits, each with a very weakly developed claw.
Pedons from both catenas are formed on colluvial deposits, gravelly and weakly developed, showing a sequence of O, A, C and C/R horizons.
Weakly developed A horizons capping each of the sediment units suggest that the landscape was sensitive to environmental change, from more arid conditions when the aeolian deposits accumulated to brief periods of landscape stability when topsoil development occurred.
There is a well-developed hypocone developed on a broad lingual cingulum, but a pericone, if present, was weakly developed (Fig. 6A B).
Their involvement in continuing redistribution of local sediments is reflected by a homogeneous silty-clayey and stone-free texture, varying profile depths, buried topsoils and weakly developed recent A horizons.
