- Prokaryotes
- Eukaryotes
- Hormones
- Coenobium
- b
-
Prokaryotes are not bacteria.
A small group of algae cells (tiny water plants) living together
Hormones is a chemical message.
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The cleavage means:
- The structure of DNA
- Sequence of mitotic division
- Hollow sac having an opening
- Eukaryotes
- b
-
Cleavage means rapid repeated mitotic (cell) divisions of the zygote after fertilization.
The structure of DNA is not cleavage.
Eukaryotes is a type of organism.
The Cephalopods belong to the phylum:
- Platyhelminthes
- Nematode
- Porifera
- Mollucsa
- d
-
Cephalopods is like octopus, squid, cuttlefish.
The single cell formed after fertilization is called:
- An Embrye
- A Gamete
- A Foetus
- A Zygote
- d
-
After fertilization, when the male gamete (sperm) and female gamete (egg) fuse, they form a single cell called a zygote. This zygote is the first cell of a new organism and later develops into an embryo and then a foetus.
The organic molecules (non-protein) which bind to enzyme (protein) and serve as a career for chemical groups or electrons are:
- Enzymes
- Glycerols
- Coenzymes
- Polynucleotide
- c
-
Coenzymes are organic molecules that bind to enzymes and help in chemical reactions.
The primary biological importance of sexual reproduction is as organism is that it:
- Is necessary for the survival of the individual
- Cause new notations to occur in the offspring
- Promotes genetic variability among offspring
- Allows larger no of offspring to be produced
- c
The chromosome has different shapes, depending on the position of:
- Cytoplasm
- Centromere
- Atmosphere
- Cytoplasm
- b
-
Centromere means the middle pin of chromosome.
The shape of chromosome depends on the position of this pin.
If it is in the middle then chromosome looks like X-Shape and if it is near the end then chromosome looks like V or L shape.
All of the following are sexual parts of the life cycle of a moss, Except:
- The male gametangium
- The female gametangium
- Rhizoids
- Ovum
- c
-
Male Gametangium produces male sex cells.
Female Gametangium produces female sex cells.
Ovum is a female sex cell.
The hollow, filamentous appendages which help in conjugation in bacteria are:
- Flagella
- Cell wall
- Capsule
- Pilli
- d
-
Pili are tiny hair-like parts on bacteria. They help one bacterium connect with another to pass genetic material during conjugation.
White blood cells picked up foreign bodies from the blood stream and destroy the harmful bacteria which enter into our body. This is the best example of:
- Osmosis
- Exocytose
- Hydrolysis
- Phagocytosis
- d
-
White Blood Cells protect our body.
Osmosis is movement of water only.
Exocytose throw things out of the cells.
Hydrolysis means breaking of something by using water.