Name three cattle diseases and their causes?

Clostridial Disease, or "Blackleg"

BRSV (Bovine Respiratory Syncytial Virus)

BVD (Bovine Viral Diarrhea)

Explanation:

Clostridial Disease, or "Blackleg" :Infection occurs when animals ingest bacterial spores while grazing. The bacterial spores penetrate the intestine and are disseminated via the bloodstream to the skeletal muscle, where the spores remain dormant.

BRSV (Bovine Respiratory Syncytial Virus): It is a very serious respiratory disease which replicates in nasal epithelium and then disperses throughout the upper respiratory tract to the bronchial tree.

BVD (Bovine Viral Diarrhea): BVD is transmitted in a number of ways. Either through a congenital infection of the fetus or after birth

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.