Fill in the Blanks Animal reproduction gaps1Online version Fill in the gaps with the given words. by Gabriel Pérez Comendador 1 water body copulation female sperm male fertilizes ova hermaphrodites sexually external ova male internal female sperm Most animals reproduce . Individuals can be either or . Males have testicles , which produce . Females have internal ovaries , which produce . In some animal species , an animal can be both and . They have both testicles and ovaries . These animals are called . There are two types of fertilization : and . Internal : During sexual union , or , the male deposits sperm inside the female's . External : It occurs in the . The females deposit the in the water and the male deposits . The sperm the ova .