Nseb

The sugar glider and flying squirrel belong to two different groups of mammals, but they have both evolved bushy tails and flaps of skin that help them exploit their forest environments more efficiently. This pattern of evolution is an example of: 

(a) character displacement 

(b) adaptive radiation. 

(c) convergent evolution 

(d) divergent evolution

Which ofthe following is a mismatched pair? 

(a) Lady’s finger – Capsule 

(b) Banana – Berry 

(c) Date – Drupe 

(d) Maize – Caryopsis

The diagram below shows the concentration of hormones in circulating blood as percentage of their maximum possible concentration. Which phase of ovarian cycle of a mammal does it represent?

Which of the following assist in the locomotion of earthworm? 

i. Muscles in the body wall 

ii. Coelomic fluid 

iii. Septa 

iv. Setae 

(a) i, ii, iii and iv 

(b) Only i, ii and iv 

(c) Only ii, iii and iv 

(d) Only i and iv

A littoral gastropod will have thickest shell when it is located at the 

(a) high tide marks on a rock beach. 

(b) greatest depth in a sand beach. 

(c) low tide marks on a mud beach. 

(d) bottom of a rock pool

The X in the accompanying diagram is:

(a) amniotic egg 

(b) bipedal locomotion 

(c) diapsid skull 

(d) four chambered heart

A biologist was given two animal cell populations, X and Y. When he subjected them to culturing under similar conditions of availability of nutrients, growth factors and substratum he found the growth of sample X stopped after the available substratum was covered while the growth of sample Y continued so that multilayered mass was formed. The cells in sample X and Y respectively, are most likely to be: 

(a) epithelial cells and leucocytes 

(b) germinal cells and muscle cells 

(c) normal cells and cancer cells 

(d) diploid cells and polyploid cells

For various cellular processes, following molecules need to be transported from the site of synthesis to the site of activity. 

i. Nucleotides 

ii. tRNA 

iii. Histones 

iv. Deoxyribose sugar 

Which molecules from the above are transported from cytoplasm to nucleus? 

(a) i and ii 

(b) i and iii 

(c) ii and iv 

(d) i and iv

In the following diagram distribution of 4 species of plants (P, Q, Rand S) along length of a geographical unit has been depicted. Which among them would best represent vegetation across a cliff?

Which of the following statements about human disorders caused by different organelles is true? 

(a) Peroxisomal disorders are due to mutations in nuclear genes. 

(b) Mitochondrial disorders are always due to mutations in maternally inherited mitochondrial genes. 

(c) Person can suffer from lysosomal storage diseases even if lysosomal hydrolases are synthesized in sufficient quantities. 

(d) Inefficient recycling of long chain fatty acids is likely to be a result of mitochondrial disorder.