The Option B is correct.
When ozone near the ground mixes with other polluting gases, then air pollution results in smog.
Smog:
smog is a kind of air pollution, originally named for the mixture of smoke and fog in the air. Classic smog results from large amounts of coal burning in an area and is caused by a mixture of smoke and sulfur dioxide. In the 1950s a new type of smog, known as Photochemical Smog, was first described.
clearing forests
leaving fields unplanted
careless farming
contour plowing
crop rotation
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Lost soil nutrients can be replaced through _____.
contour plowing
recycling
crop rotation
erosion
Answer:
First one is
-careless farming
-leaving fields unplanted
-clearing forests
And the second is
-crop rotation
Explanation:
Genes are the hereditary units, which carry information from the parent to offspring. The variant form of the gene, an allele codes for different traits, but is present at the same locus of the chromosome.
Given that:
The phenotypes of crawfish are long, medium, and short.
Parents have medium antennae.
The progeny have long and short antennae.
Let us assume the genotype as:
Let allele A be dominant that codes for long antennae.
Allele a is recessive and codes for short antennae.
The expression of three phenotypes suggests that the alleles are inherited through incomplete dominance.
Incomplete dominance is the phenomenon in which both the alleles will be expressed incompletely. The alleles for long and short will not be expressed properly, leading to medium-length antennae.
The expression can be given as:
AA - Long antennae
Aa - Medium Length antennae
aa - Short Length antennae
The cross for the given alleles is given in the attachment below.
Thus, F1 progeny will have 25 % purebred dominant for long antennae, 50% of the progeny will have heterozygous medium antennae, and 25% of the progeny will have purebred recessive short antennae.
To know more about the cross, refer to the following link:
Offspring trait variations, such as antennae length in crawfish, are a result of genetic recombination during sexual reproduction. Each parent contributes a set of chromosomes that contain genes for these traits.
The traits of offspring, like antennae length in crawfish, are determined by their parents' genes, which carry information for various physical characteristics. We see this in the diversity of freshwater crustaceans such as crawfish, where children may inherit different traits like short or long antennae.
Each parent crawfish contributes one set of chromosomes, which include genes for traits like antennae length. The actual trait an offspring exhibits, such as short or long antennae, depends on the combination of the alleles (versions of the gene) it receives from its parents. This is an example of Mendelian genetics and shows that although the parents may both have medium-length antennae, they carry alleles for other antenna lengths which can appear in their offspring.
For the offspring to have short or long antennae, one parent must have contributed the 'short' allele and the other the 'long' allele while both also carry the 'medium' allele. The combination of these alleles results in offspring with different antennae length traits due to the process known as genetic recombination during sexual reproduction.
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Answer: The desert and tundra biomes have very different temperatures as well as extremely different plants and animals. The desert can get very hot during the day, but cool off quickly at night. It has sandy soil and supports very little plant life. Animals found in the desert include lizards, javelinas, Gila monsters, coyotes, bobcats, scorpions, and kangaroo rats. The tundra is cold, dry, and often dark. The average temperature is about 10°F. The soil below the surface is permanently frozen, and is called permafrost. A few types of plants grow during the short summer season. Animals found in the tundra include caribou, foxes, wolves, and Arctic hares.
related?
O A. Echinodermata and Annelida
O B. Mollusca and Arthropoda
O C. Mollusca and Echinodermata
O D. Annelida and Chordata
Invertebrates with an exoskeleton, segmented bodies, and paired jointed appendages are known as arthropods.
Molluscan animals have soft bodies that are triploblastic, bilaterally symmetrical, and coelomate. Malacology is the study of Mollusks. They are slow-moving invertebrates with a thin fleshy envelope or mantle that protects the visceral organs.
Thus, we can conclude that option B, Mollusca, and Arthropoda are correct.
You can learn more about Mollusca here:
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Answer: B
Explanation:
AP*X
Answer:
Explanation:
You have external defense systems, which include your skin, tears, mucus, saliva, stomach acid, cilia (small hairs) and helpful bacteria. ... The skin stops pathogens from entering the blood, at least when you're not bleeding. The tears, mucus, and cilia trap them and help push them back out of your body.
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