Answer:
In the Cretaceous period, Mesozoic Era forests begin to look like modern day forests and included a variety of conifers and decidous trees.
Explanation:
The Cretaceous period was the last and longest segment of the Mesozoic Era.It lasted approximated 79 million years from the minor extinction events that closed the Jurassic Period about 145.5 million years ago to the Cretaceous - Palogene ( K-Pg) extinction event dated at 65.5 million years ago. This era have seen more dinosaurs than before.The horned Cretaceous dinosaurs appeared, like the Triceratops and Centrosaurus. The armored Ankylosaurus, duckbilled Parasaurolophus, and large carnivore Tyrannosaurus were a few of the quickly evolving dinosaurs.
Chemical. Needs to break down the starch and glucoses into sugars.
Answer:
b. They are carried throughout the body in the bloodstream, and each hormone affects target cells that have receptors for it.
Explanation:
Hormones are secreted by hormonal glands after they get signals to secrete or release the hormone. Then these hormones are carried by the bloodstream to their destination. Each hormone has its target organ or tissue which do not response to other hormones because it the cells in those tissue have specific receptor which binds to specific hormones.
For example, luteinizing hormone in male is produced by the pituitary gland which reach to the testis through blood and influence the Leydig cell to release testosterone. So Leydig cells have receptors for LH not for insulin hormone so it binds specifically to LH hormone. So the correct answer is b.
Answer:
Homozygous recessive individual
Explanation:
A testcross is a cross performed to test the genotype of an organism. The test cross is performed when the nature of the phenotype that is if the phenotype is dominant or recessive is known.
We know that a recessive trait is the result of the homozygous condition or phenotype is expressed when the genotype has two recessive alleles. But the genotype of the dominant trait could be determined when the genotype has either both the dominant alleles (homozygous dominant) or the either one of them is dominant allele (heterozygous condition).
So to determine if the dominant phenotype is determined by homozygous genotype or the heterozygous genotype, testcross is performed between the homozygous recessive genotype and the unknown dominant phenotype organism.
Thus, Homozygous recessive individual is the correct answer.
