Answer:
Both parents are heterozygous
Explanation:
Assuming the allele for colour in the sheep is represented by S.
A white sheep will have a genotype of SS or Ss assuming S is dominant over s and a black sheep will have a genotype of ss.
Over the couse of several years, a cross betweem two white sheep (SS or Ss?) produced three white and one black offspring. For them to have produced one black offspring (ss), it thus means that the two white sheep are heterozygous:
Ss x Ss = SS (white), Ss (white), Ss (white) and ss (black).
<em>The best explanation is that both parental sheep are heterozygous for the trait.</em>
The small, heart-shaped gametophyte called a prothallus is part of the life cycle of ferns. So, the correct option is (b).
A fern (Polypodiopsida or Polypodiophyta) is a type of vascular plant that reproduces through spores and lacks both seeds and flowers. Vascular plants have xylem and phloem. Their vascularity, or the presence of specialised tissues that conduct water and nutrients, sets them apart from mosses and other bryophytes.
A fern's prothallus is a flat, green, autotrophic, cordate (heart-shaped), dorsiventral, free-living, autonomous, nonvascular gametophyte that ranges in size from 1/8 to 113 inches (5-l0 mm). Typically, the gametophyte stage of the life cycle is known as the protothallium or prothallus. The spore that germinates becomes the prothallium.
Learn more about prothallus here:
brainly.com/question/7719914
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Answer:
Through the process of photosynthesis, carbon dioxide is pulled from the air to produce food made from carbon for plant growth. Carbon moves from plants to animals. Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too.
When meditation is done properly, brain waves change to include more theta waves.
<span>Theta waves are more active when the thinking mind transitions to the meditative mind. Theta waves represent a deeper state of awareness with stronger intuition. During meditation, those waves are the most abundant in the frontal and middle parts of the brain.</span>
