The release of sperms through the urethral opening into the vagina is called?
copulation
ejaculation
fertilization
spermatogenesis
urination
Correct answer is B
After semen is released into the vagina, sperm immediately separates from the remaining ejaculate and sperms begin moving into the cervix and up into the uterus for fertilization in the fallopian tubes. Sperm moves into the tubes within minutes after ejaculation in the vagina.
Which of these statements is NOT an idea contained in Lamarck’s theory of evolution?
acquired characters are inheritable
changes in the environment result in corresponding changes in the species
environmental changes cause the organism to acquire new structures as an adjustment to a new prevailing environment
organisms develop specialized characteristic by use and disuse of organs
organisms tend to an increase in number at an exponential rate
Correct answer is E
Lamarckism, also known as Lamarckian inheritance or neo-Lamarckism, is the notion that an organism can pass on to its offspring physical characteristics that the parent organism acquired through use or disuse during its lifetime. It is also called the inheritance of acquired characteristics.
Lianas is to a tropical rain forest as an extensive root system is to a/an ---------------- habitat
afroalpine
estuarine
freshwater
grassland
marine
Correct answer is D
No explanation has been provided for this answer.
Which material is NOT necessary for the manufacture of plant food?
carbon (iv) oxide
chlorophyll
oxygen
sunlight
water
Correct answer is C
No explanation has been provided for this answer.
Which of the following agricultural activities has the least harmful effect on the environment ?
applying fertilizers
practicing crop rotation
practicing monocropping
spraying herbicides
spraying pesticides
Correct answer is B
No explanation has been provided for this answer.