Seeds develop inside the ovary after fertilisation. Ovules develop into seeds and ovary matures to form a fruit. The seed contains an embryo... View Article
No, Ginkgo tree belongs to gymnosperms. Ginkgo biloba is the only living species of the division Ginkgophyta, rest all the species are extinct.... View Article
The human sperm contains two centrioles in the neck region. They are known as proximal centriole (PC), which is near the head region and distant... View Article
Lysosomes are membrane-bound vesicles, which are rich in hydrolysing enzymes. Lysosomal enzymes are packaged inside a vesicle in the Golgi... View Article
Smooth endoplasmic reticulum (SER) is the main site of lipid synthesis in the cell. It also contains certain detoxifying enzymes, which helps in... View Article
Harmful algal bloom is caused due to presence of abundant nutrients in water. These are mostly nitrates, urea and phosphates present in the... View Article
Ribosomes are made up of rRNA and proteins. rRNAs are transcribed in the nucleolus. Ribosomal proteins are synthesised in the cytoplasm and they... View Article
Mostly plant cells lack flagella. Some of the plants produce flagellated male gametes such as algae, bryophytes, pteridophytes, etc. Further... View Article
Gaseous exchange in insects takes place through a network of tubes called trachea. Air enters through tiny external openings on the body surface... View Article
Yes, eukaryotic cells have rough endoplasmic reticulum (RER). It has ribosomes on its surface, which are the site of protein synthesis. RER is... View Article
No, centrioles do not contain DNA. Centrioles contain RNA, which takes part in the aster formation during mitosis. Centrioles form spindle fibres... View Article
No, bacteria do not have ER or endoplasmic reticulum. The endoplasmic reticulum is a membrane-bound organelle present in the eukaryotic cell. In... View Article
No, ciliary muscles are involuntary. They are part of the ciliary body and are present between the sclera and the ligaments that suspend lens.... View Article
Tissues having ciliary epithelium are affected by primary ciliary dyskinesia such as lower and upper respiratory tract, fallopian tube, sperm... View Article
The ciliary muscle is present in the ciliary body of the eyes. It is present at the anterior part of the vascular choroid layer (middle layer) of... View Article
Cilia are the hair-like outgrowth present on the plasma membrane. Ciliary movement refers to the rhythmic movement of cilia, which causes... View Article
Primary ciliary dyskinesia is an autosomal recessive genetic disorder resulting in inefficient and uncoordinated movement of cilia and flagella.... View Article
Ciliary muscles are attached to the lens in the eyes by zonular fibres. They can change the shape of the lens by contracting and help us focus... View Article
When ciliary muscles contract, it makes the lens more spherical by releasing the tension on zonular fibres. Lens can now focus on near objects... View Article
Ciliary muscles are involved in the accommodation reflex. Ciliary muscles help in changing shape of the lens to focus on the near object. It also... View Article
