Biology Past Questions And Answers
Which of the following levels of organisation in living things is in the correct sequence, starting from the most complex to me simplest?
- A. tissue ? cell ? organ ? system
- B. System ? organ ? tissue ? cell
- C. Cell ? tissue ? system ? organ
- D. Cell ? tissue ? organ ? system
When a mixture of a food substance and Benedict's solution was warmed, the solution changed from blue to brick-red. This indicates the presence of?
- A. reducing sugar
- B. fatty acid
- C. sucrose
- D. amino acid
Which of the following groups carry out similar functions in living things?
- A. Vertebral column, chitin, and guard cells
- B. Sclerenchyma, cartilage and chitin
- C. Tendon, chitin and neurone
- D. Collenchyma, Intercellular spaces and blood vessels
In grasshopper/cockroach digestion starts from the
- A. oesophagus
- B. crop
- C. gizzard
- D. mouth
In ferns, the sporophyte
- A. develops from a haploid zygote
- B. reproduce asexually to produce spores
- C. is haploid and dependant on gametophyte
- D. is diploid and independent of the gametophyte
Which of the following organs in mammals is not excretory in function?
- A. Liver
- B. Kidney
- C. Pancreas
- D. Lungs
Which of the following biomass could be characterized by very low rainfall,cold nights, hot days, and fast blooming plants?
- A. northern guinea savanna
- B. sounthern guinea savanna
- C. tropical desert
- D. montane forest
A homozygous tall, red flower plant was crossed with a homozygous dwarf, white flower plant. The F1 were selfed and 160 F2 plants were obtained.
a.(i) Name the type of genetic cross. [1 marks]
(ii) Stateonereason for the answer in 4(a)(i). [1 marks]
b.(i) What is evolution? [2 marks]
(ii) With the aid of a genetic diagram, state the phenotypic ratio of F2 generation. [13 marks]
(iii) Calculate the number of tall and white flowers that would be obtained in theF2generation. [3 marks]
View Discussion (0)WAEC 2019 THEORYA major difference between Arachnids and Annelids is that....
- A) In Annelids, body consists of dissimilar segments unlike in Arachnids
- B) In Annelids, body consists of similar segments unlike in Arachnids
- C) In Arachnids, the cephalothorax is not distinct unlike in Arachnids
- D) In Annelids, the cephalothorax is distinct unlike in arachnids
Secondary thickening in dicotyledonous stem is controlled by the
- A. xylem
- B. phloem
- C. cambium
- D. pericycle