The mammalian vein which starts with and ends in a capillary network is the

A. pulmonary vein

B. mesenteric vein

C. renal vein

D. hepatic potal vein

In the transverse of a dicot sperm, the region lying between the endodermis and the vascular bundle is the

A. parenchyma

B. pericycle

C. phloem

D. hypodermis

The two normal types of sex chromosomes are

A. XXY and XYY

B. XX and XYY

C. XY and XXY

D. XXand XY

One advantage of variation in a species population is that individuals

A. with favoured traits become dominant

B. easily reach their reproductive age

C. are easily recognised by mates

D. are better adapted to changes

Mendel's second law of inheritance states that

A. alleles combine randomly

B. alleles segregates independently

C. alleles seperate predictably

D. chromosomes segregates independently

The intensity of competition among animals in a given area will increase with

A. an increase in the frequency of disease outbreaks

B. an increase in population size

C. a decrease in immigration rate

D. an increase in the emigration rate

The part of the mammalian skin involved in temperature regulation is the

A. sweat gland

B. hair papilla

C. hair follicle

D. sebaceous gland

The role of the Golgi complex in a eukaryotic cell is to

A. conduct irons in and out of the cells

B. transport genetic materials out of the cell

C. provide attachment for ribosomal granules

D. transport organic materials in and out of the cells

The dominant phase in the life cycle of a bryophyte is the

A. gametangium

B. sporophyte

C. gametophyte

D. prothallus

The evidence that supports the advancement of ferns over mosses is derive from

A. comparative anatomy

B. molecular records

C. biochemical similarities

D. physiological records