13. A typical pollen grain of a seed plant might contain
a male and female gametophytes.
b. a microspore mother cell.
C a generative cell and a tube cell.
d a mėgaspore and two sperm cells.

What is the difference between an igneous, sedimentary and metamorphic rock

Gregor mendel is best known for his work with pea plants and for uncover many of the mysteries of genetics. one of his major findings stated that there were specific, physical units of inheritance that are transmitted during reproduction. what is the the name given to these units of inheritance which can be found on chromosomes? a) centromeres b) cytoplasm c) genes d) nucleotides

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?