Where is the options ???!!!
Answer:
Dissimilar organisms might have evolved from a distant, common ancestor.
Explanation:
First of all we should know species. Species is considered as a basic unit of taxonomic classification of an organism.
Initially, the scientists are agreed on this phenomenon that all distinct species are evolved gradually from common ancestor. Today, the species which are different from each other just like hummingbirds, humans and whales are from the same ancestor but with the time passage genetic mutation occurs and at the end dissimilar organisms we can see in our environment/surroundings.
Answer:
1. Reducing
2. External
Explanation:
The external urinary sphincter, also called as external urethral sphincter consists of skeletal muscles. During micturition reflex, the micturition center present in the brain serves to inhibit the somatic motor neurons by reducing their action potential. These somatic motor neurons innervate in the external urinary sphincter.
Inhibition of somatic motor neurons of the external urinary sphincter results in relaxation of the sphincter to facilitate the act of urination.
Answer:
Endoplasmic reticulum
Explanation:
The endoplasmic reticulum makes an extensive internal system of membranes in the eukaryotic cells. It makes a system of tubes and sacs that run throughout the cytoplasm. The ER is connected to the nuclear envelop also and serves in the transport of substances and proteins throughout the cells with the help of transport vesicles. For instance, the proteins formed on the surface of rough ER are packed in vesicles that bud off from the surface of rough ER and are carried to the Golgi apparatus for processing.
The advantage for the reduced gametophytes in seed plant is that they gain nutrients from the sporophytes
Gametophytes are microscopic and have capacity to develop from spores retained in the sporangia of parental sporophyte. This kind of arrangement protect developing gametophyte from environment stress which enable it to gain nutrient from sporophyte.
