The phrase "are lacking in a" is correct and usable in written English.
It can be used to indicate that something is deficient or missing in a particular aspect or quality.
Example: "The students are lacking in a fundamental understanding of the subject matter."
Alternatives: "are deficient in a" or "are missing a".
Antra are lacking in a few insectivores (Hemicentetes, Euriculus) because the granulosa cells swell and multiply to form corpora lutea, masses of yellow tissue.
It's not that they are lacking in a technical way.
Analysis of the critical infrastructure development experiences of similar countries can help identify the critical infrastructure items that are lacking in a country of interest, mitigate the risks pertaining to policy implementation failures and provide useful planning information to policymakers.
More generally, he thinks (i) the Averroistic theses are lacking in a solid philosophical basis, since they can be maintained from the physical point of view only, according to which everything is considered qua affected by or connected with motion, but (ii) they are totally false from the metaphysical point of view, which is the most comprehensive of all.
Specifically, an EvoDifference profile identifies sequences present in a group of related genomes that are lacking in a single genome, and an EvoUnique profile highlights sequences that are either unique or uniquely shared by a subset of bacteria included in the analysis.
Yet there are exceptions: many ndh genes are lacking in a number of orchids [ 22].
Because ligands that selectively inhibit α3β2, α6/α3β2β3, and α3β4 nAChRs are lacking, in an earlier study we investigated the α4/7 conotoxin LvIA, which is the first α-conotoxin discovered from the carnivorous marine gastropod Conus lividus (Luo et al., 2014).
I've long felt that the Book Bench was lacking in a specific area: dog drawings.
But the likeliest culprit is quality, which many studio executives concede has been lacking in a lot of releases.
I am also finding that because I worked so many hours/jobs before, I am lacking in a social network.
If truly only one sort of life on Earth exists, then perspective is lacking in a most fundamental way.
