Answer:
It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule.
Explanation:
Acetyl-CoA(2C) associates with oxalacetate(4C) to form citric acid(6C). Then through redox reactions, CO2 molecules result from decarboxylation (COOH becomes R-(R1)CH-R2). And through dehydrogenation H2 molecules are incorporated in NADH+ in FADH2, resulting in the 4-carbon molecule at the beginning (oxalacetate). That's why it's called a cycle(Kreb's cycle or citric acid cycle)
Answer: parthenogenesis (apomixis and automixis)
Explanation: parthenogenesis can be simply defined as a form of asexual reproduction where the developmental process begins i.e egg develop into an embryo without the prior fertilization from sperm cells.
Egg cells or sex cell (oocyte) are reproduced by replications which produces two diploid cells having full complement of chromosomes that is required for the developmental process to begin.
This form of reproduction occurs in plants as well as some lower invertebrates such as anthropods (insects) and some species of aves, amphibians and reptilians.
It should be noted that parthenogenesis doesn't occur in mammals.
Answer:
Limited resources for the population
Seedless vascular plants are classified into three phyla namely the club mosses, horsetails and ferns. Ferns form the numerous seedless plants with true vascular tissue, creeping underground stems called the rhizomes and large leaves called the fronds. They reproduce via spores.
Ferns crowd on the forest floors even after cutting them down. They invade the cleared zone of forest which has been cut for timber via numerous spores. The spores are in clusters called sori on the underside of the leaves. The spores develop into haploid gametophytes by mitosis. They also grow by spreading their rhizomes or from the tips of their fronds.
